Table of Contents
Overview
Definition of Bioremediation
Bioremediation is defined as an environmentally friendly process for the removal of harmful pollutants from soil, water, and air using microbes.[3.1] This process involves treating contaminated water, soil, and subsurface materials by stimulating microbial growth to degrade target pollutants, making it an eco-friendly and cost-effective method for addressing environmental contamination.[1.1] Bioremediation encompasses various procedures aimed at mitigating the adverse effects of pollutants on the environment, highlighting its versatility in addressing different types of contaminants.[3.1] Additionally, a brief outline of the development of bioremediation technologies is presented, discussing the major features and limitations, as well as providing an overview of the current state of the art in field applications.[4.1]Importance and Benefits
Bioremediation plays a crucial role in addressing environmental contamination through sustainable practices that utilize microorganisms, fungi, and plants to degrade pollutants. The integration of bioremediation into the circular economy framework is particularly significant, as it optimizes resource use, minimizes environmental impacts, and fosters resilient systems for managing contaminated sites while preserving environmental quality.[7.1] The effectiveness of bioremediation is evidenced by numerous successful case studies, which highlight its potential as a sustainable approach to environmental cleanup. For instance, bioremediation techniques were employed in the Exxon Valdez oil spill of 1989, where oil-degrading bacteria were introduced to facilitate a responsible and eco-friendly cleanup.[29.1] Other notable applications include the treatment of wastewater and the remediation of PCB-contaminated rivers, demonstrating the versatility and effectiveness of bioremediation across various scenarios.[26.1] Moreover, bioremediation not only addresses environmental concerns but also offers significant economic benefits. For example, a project in Ontario, Canada, showcased that by utilizing bioremediation instead of off-site disposal, remediation costs were reduced by over 50%, saving the client nearly $200,000.[28.1] This highlights the dual advantage of bioremediation in providing cost-effective solutions while ensuring environmental safety. The importance of robust policy frameworks and proactive public engagement cannot be overstated in the context of bioremediation. Effective policies are essential for the safe and responsible implementation of bioremediation strategies, ensuring that scientific advancements are balanced with regulatory oversight and community involvement.[14.1] Furthermore, enhancing public perception of bioremediation as an environmentally responsible practice can significantly bolster support for such initiatives.[16.1] By showcasing successful projects and fostering dialogue among stakeholders, the potential for bioremediation to contribute positively to environmental remediation efforts can be maximized.[17.1]History
Discovery of Bioremediation
The discovery of bioremediation can be traced back to the 1940s when scientists first recognized that various microbes could degrade petroleum hydrocarbons, laying the groundwork for future developments in the field.[41.1] The significance of bioremediation became particularly evident following the Exxon Valdez oil spill in 1989, which catalyzed advancements in the application of microbial techniques for environmental cleanup. This event is often categorized into three distinct periods: the "Courtship" period leading up to 1989, the "Honeymoon" period from 1989 to 1991, and the "Establishment" period beginning in 1992.[42.1] In the aftermath of the Exxon Valdez spill, the Environmental Protection Agency (EPA) supported Exxon’s proposal to utilize bioremediation as a cleanup strategy, providing critical information to facilitate this approach.[43.1] The spill's extensive environmental damage and its media coverage prompted a reevaluation of oil spill response strategies in the United States, ultimately leading to the enactment of the Oil Pollution Act of 1990. This legislation established the National Oceanic and Atmospheric Administration's Damage Assessment, Remediation, and Restoration Program (DARRP).[46.1] The Exxon Valdez incident not only highlighted the potential of bioremediation but also served as a benchmark for comparing future oil spills, such as the BP Deepwater Horizon spill in 2010, despite the differing contexts of these environmental disasters.[44.1] Research conducted in the years following the spill revealed valuable insights into the effectiveness of bioremediation, including assessments of oil residue concentrations in affected areas 18 years post-spill.[45.1] Thus, the Exxon Valdez oil spill played a pivotal role in shaping public perception and policy regarding bioremediation, marking a significant turning point in the history of environmental remediation practices.Development Over the Decades
Bioremediation, defined as the use of living organisms to degrade wastes, has roots that trace back to the earliest human civilizations, where people unknowingly relied on microorganisms in soil and water to manage waste from domestic, agricultural, and industrial activities.[40.1] This practice has evolved significantly over the decades, particularly in response to increasing environmental concerns and ecological disasters. The recognition of bioremediation as a vital environmental technology has developed significantly over the decades, particularly in response to major ecological disasters. A notable event was the fire on the Cuyahoga River in 1969, which triggered a wave of water pollution control initiatives, including the Clean Water Act and the Great Lakes Water Quality Agreement. These legislative actions spurred a substantial increase in water pollution control activities and shaped the funding and research priorities in bioremediation technologies.[67.1] Additionally, the engagement of ecologists in the disaster cycle has been instrumental, focusing on trends in training and education, research funding, and the prevalence of community engagement in ecological research.[64.1] This collective response to environmental crises has underscored the importance of bioremediation in restoring ecosystems and preventing further contamination. Recent advancements have demonstrated the efficacy of bioremediation in addressing anthropogenic pollutants resulting from industrial and agricultural processes. Compared to traditional chemical and physical remediation methods, bioremediation is recognized for being more eco-friendly, easier to implement, and less invasive.[65.1] The growing awareness of ecosystem destruction and the financial investments directed towards restoration efforts have further solidified bioremediation as a critical tool in combating the biodiversity crisis and repairing damaged ecosystems.[66.1]Types Of Bioremediation
In Situ Bioremediation
In situ bioremediation is a process employed to clean up and detoxify polluted sites by utilizing microorganisms, plants, or their enzymes to break down and degrade environmental contaminants. This method offers a sustainable and environmentally friendly approach to addressing pollution issues, as it relies on natural biological processes to remediate contaminated environments.[79.1] Bioremediation can be categorized into two main types: intrinsic and extrinsic. Intrinsic bioremediation capitalizes on the inherent ability of native organisms to mitigate pollution without human intervention, while extrinsic bioremediation involves enhancements, such as the addition of nutrients or other amendments, to improve microbial activity and degradation rates.[76.1] In situ bioremediation is significantly influenced by various environmental factors, including temperature and nutrient availability. Temperature plays a crucial role in determining the rate of bacterial growth, enzymatic activity, and the overall chemistry of pollutants, which are essential for effective degradation processes.[87.1] Furthermore, the addition of nutrients can positively impact the biostimulation of microbial communities, enhancing the biodegradation of specific contaminants such as phenanthrene. However, research indicates that optimal biostimulation may occur at lower concentrations of nutrients, as demonstrated in studies of hydrocarbon-contaminated arctic soils.[88.1] Thus, understanding these environmental factors is vital for optimizing in situ bioremediation strategies. In situ bioremediation is a crucial approach for mitigating environmental hazards, such as soil contamination and oil spills, through various bioremediation techniques.[77.1] Among these techniques, phytoremediation stands out due to its ecological benefits and effectiveness in managing a diverse array of contaminants. The selection of appropriate plant species is vital for the success of phytoremediation, as these plants must meet several important criteria. Specifically, they should exhibit high metal tolerance, possess a short life cycle, have a broad distribution, produce substantial biomass, and maintain a translocation factor greater than 1.[80.1] These criteria ensure that the selected plants can effectively uptake and remove contaminants from the environment. Therefore, understanding these selection criteria is essential for the effective application of phytoremediation strategies in contaminated sites.Ex Situ Bioremediation
Ex situ bioremediation involves the removal of contaminated materials from their original location to a controlled environment for treatment. This method is particularly effective for addressing pollutants that are difficult to degrade in situ. Various innovative techniques have emerged within this category, enhancing the effectiveness and efficiency of the remediation process. One notable approach is mycoremediation, which utilizes specific fungi, particularly mushrooms, to break down pollutants and toxins in soil, water, and air. This biological remediation method has shown promise in eliminating a wide range of contaminants, making it a valuable tool in ex situ bioremediation efforts.[104.1] Additionally, green bioremediation has gained traction as an innovative technique that addresses toxic waste in polluted environments, targeting a variety of contaminants such as heavy metals, polychlorinated biphenyls, and plastics.[103.1] Innovative remediation techniques are essential for effectively removing persistent organic pollutants (POPs) from soil and water, thereby protecting human health and the environment from these harmful substances (Camacho-Jiménez et al., 2023).[101.1] These techniques include a thorough review of cutting-edge approaches that aim to enhance the degradation of POPs, comparing their effectiveness and cost to traditional methods (Camacho-Jiménez et al., 2023).[101.1] Among the advancements being explored are various optimization strategies for classical bioremediation technologies and the application of synthetic biology-driven remediation (Camacho-Jiménez et al., 2023).[101.1] Additionally, innovative and efficient amendment delivery strategies, along with ex situ biological treatment methods, are being developed to overcome the limitations of conventional bioremediation approaches (Camacho-Jiménez et al., 2023).[101.1]Mechanisms Of Bioremediation
Microbial Processes
Microbial processes play a crucial role in bioremediation, utilizing various microorganisms to degrade environmental pollutants. Bioremediation broadly encompasses any process where biological systems, including bacteria, fungi, and microalgae, are employed to remove contaminants from air, water, and soil, making it a sustainable and eco-friendly alternative to traditional remediation methods.[116.1] Microbial bioremediation is recognized as a cost-effective and eco-friendly solution for environmental restoration, significantly reducing the financial burdens often associated with traditional remediation methods.[119.1] There are seven different types of bioremediation mechanisms, which include in situ bioremediation, phytoremediation, mycoremediation, ex situ bioremediation, biosimulation, and bioaugmentation.[117.1] In situ bioremediation involves treating contaminated material directly at the site of contamination, while ex situ bioremediation entails the removal of contaminated material for treatment elsewhere. Biostimulation, which can be synergized with other remediation strategies such as bioaugmentation or bioventing, involves adding specific nutrients to boost microbial activity and enhance the degradation of pollutants.[119.1] Bioventing, a subset of extrinsic bioremediation, utilizes aeration to energize microbial activities in unsaturated soil, thereby accelerating the degradation of pollutants, particularly petroleum hydrocarbon contaminants.[119.1] Phytoremediation is a bioremediation process that utilizes various types of plants to remove, transfer, stabilize, and/or destroy contaminants in soil and groundwater.[118.1] This process includes several different types of mechanisms, one of which is rhizosphere biodegradation.[118.1] Microbial bioremediation is significantly influenced by various environmental conditions, particularly soil pH, which is often referred to as the "master soil variable" due to its profound impact on biogeochemical processes in the soil.[130.1] The optimal pH value for effective bioremediation processes is around pH 6; however, microbial activity can be severely inhibited at pH levels ranging from 8 to 10, leading to microbial death.[127.1] Additionally, soil microorganisms play a crucial role in the degradation of polycyclic aromatic hydrocarbons (PAHs) through various metabolic pathways, highlighting the importance of understanding how pH can be manipulated to enhance bioremediation efforts.[128.1] Emerging technologies, particularly synthetic biology, are enhancing the efficiency of microbial bioremediation. Advances in this field allow for the engineering of microbial strains with specific genetic circuits designed to improve their pollutant-degrading capabilities.[143.1] This manipulation of biodegradative pathways represents a promising avenue for developing tailored microbial solutions to complex environmental challenges.[141.1]Role of Plants and Fungi
Plants and fungi are integral to bioremediation, each contributing unique mechanisms that enhance the detoxification of contaminated environments. Plants utilize processes such as phytoremediation, rhizofiltration, and phytoextraction to absorb and neutralize pollutants, including heavy metals and organic compounds, from soil and water sources [134.1]. The choice of plant species is critical and depends on factors like contaminant tolerance, growth rate, and biomass yield, which can be systematically evaluated using multi-criteria decision analysis (MCDA) tools [121.1][120.1]. Fungi, particularly through mycoremediation, offer a complementary approach by breaking down complex pollutants using enzymatic processes. This method is especially effective in ex situ settings where controlled conditions can optimize fungal activity [104.1]. The synergy between plant and fungal systems can be harnessed to address a broader spectrum of contaminants, leveraging their respective strengths in different environmental contexts. Environmental factors such as temperature, pH, and nutrient availability significantly influence the success of bioremediation efforts [122.1]. Advances in genetic engineering are enhancing plant capabilities, enabling improved uptake and tolerance of metals like cadmium [136.1]. Understanding plant-microbe interactions at the biochemical and molecular levels is crucial for optimizing these bioremediation strategies, as these interactions facilitate the detoxification and transport of contaminants [137.1][135.1]. By integrating plant biology with environmental science, we can develop more effective and sustainable bioremediation solutions.In this section:
Recent Advancements
Emerging Contaminants
Emerging contaminants pose significant challenges to environmental management, necessitating innovative approaches such as bioremediation. Bioremediation is a microorganism-mediated process that transforms or degrades contaminants into nonhazardous or less-hazardous substances, utilizing various organisms including bacteria, fungi, algae, and plants for effective pollutant remediation.[171.1] This biological mechanism is essential for the degradation, eradication, immobilization, or detoxification of diverse chemical wastes and hazardous materials from the environment.[172.1] Recent advancements in bioremediation have highlighted the role of genetically modified microorganisms (GEMs) in addressing specific pollutants that natural bacterial populations may not effectively decompose.[173.1] These GEMs are engineered to enhance the efficiency of pollutant elimination, particularly in environments heavily impacted by pollution.[173.1] The application of bioremediation techniques, such as biostimulation and bioaugmentation, has been reported globally, showcasing the versatility of microbial interventions in tackling various contaminants, including hydrocarbons, heavy metals, pesticides, and dyes.[172.1] The mechanisms through which microorganisms degrade pollutants are diverse and depend on several factors, including the bioavailability of contaminants and environmental conditions.[177.1] Microbial communities exhibit complex interactions that enhance their metabolic potential, allowing them to degrade a wider array of pollutants effectively.[177.1] These interactions facilitate a division of labor among species, optimizing the degradation processes for specific contaminants.[177.1] Overall, the integration of bioremediation strategies represents a cutting-edge and ecologically sustainable approach to mitigating the impacts of emerging contaminants on the environment.[174.1]Genetic Engineering in Bioremediation
Recent advancements in bioremediation have underscored its significance as an advanced and environmentally sustainable technology that utilizes biological microorganisms to mitigate pollution.[159.1] This technology operates through the catalytic reaction mechanisms of microbial enzymes, which are capable of degrading and eliminating harmful environmental pollutants, thereby transforming them into non-toxic forms.[176.1] The primary types of microbial enzymes involved in this degradation process include hydrolases, lipases, oxidoreductases, oxygenases, and laccases, each of which plays a crucial role in breaking down various hazardous environmental contaminants.[176.1] One significant application of genetic engineering in bioremediation is the development of genetically modified bacteria that can degrade oil spills. These engineered microbes are designed to express specific enzymes that facilitate the breakdown of hydrocarbons into less harmful byproducts, thus accelerating the cleanup process in contaminated environments.[168.1] The Exxon Valdez oil spill serves as a notable case where bioremediation techniques, including the use of genetically engineered bacteria, were employed to mitigate environmental damage.[168.1] Bioremediation is an advanced and environmentally sustainable technology that utilizes biological microorganisms to mitigate pollution.[159.1] Recent advancements in this field have highlighted the transformative potential of integrating technologies such as the Internet of Things (IoT), Artificial Intelligence (AI), and biosensors. AI models play a crucial role in enhancing bioremediation strategies by predicting the outcomes of different approaches, which aids in selecting the most efficient and cost-effective methods tailored to specific pollutants.[170.1] This integration leads to a better understanding of contamination sources and facilitates the development of more effective remediation strategies, ultimately contributing to improved environmental cleanup efforts.[170.1]In this section:
Applications Of Bioremediation
Industrial Applications
The leather industry has increasingly adopted bioremediation techniques to address the environmental challenges posed by tannery effluents. These techniques utilize microorganisms to effectively degrade organic pollutants, thereby making leather production more sustainable and marketable both nationally and internationally. Recent studies have highlighted various bioremediation methods that show promise in mitigating tannery wastewater contamination, emphasizing the need for innovative solutions in this sector.[203.1] One significant advancement in the treatment of leather wastewater is the implementation of Moving-Bed Biofilm Reactor (MBBR) technology, which incorporates activated sludge and biocarriers to efficiently remove organic and nitrogen pollutants from the wastewater.[204.1] This technology not only enhances the efficiency of the treatment process but also contributes to economic benefits by reducing the need for chemicals used in pH adjustment.[204.1] Furthermore, discussions surrounding leather waste often focus on its consequences and management approaches; however, innovative strategies for solid leather waste reutilization are emerging, particularly within a biorefinery concept that aims to build a circular economy.[205.1] Such frameworks are expected to enhance the triple bottom line of the tannery industry, promoting sustainability while also creating value-added products.[205.1] The degradation pathway of leather industry wastewater through bioremediation involves the breakdown of organic pollutants by microbial organisms, which is crucial for reducing the environmental impact of leather production.[213.1] The leather industry predominantly uses chromium-based tanning agents, which pose significant risks due to their toxicity. The presence of chromium and other heavy metals in effluents can lead to severe health issues, including skin irritation and lung cancer, necessitating effective removal strategies to comply with environmental regulations.[217.1] The leather industry, while considered sustainable, faces significant environmental challenges due to the effluents it releases. To address these issues, various bioremediation strategies are being employed to treat leather industrial effluents in an eco-friendly manner.[215.1] One innovative approach involves the use of keratinase enzymes, particularly those derived from microbial sources such as Bacillus cereus, which can degrade poultry waste, including feathers. This method serves as an alternative to traditional chemical dehairing processes, thereby reducing environmental pollution.[216.1] Furthermore, the implementation of solid leather waste reutilization strategies within a biorefinery concept can enhance the circular economy and improve the triple bottom line of the tannery industry.[205.1]Environmental Restoration
Bioremediation is a crucial strategy for environmental restoration, employing biological processes to detoxify polluted sites. This method uses microorganisms, plants, or their enzymes to break down environmental contaminants, providing a sustainable and eco-friendly solution to pollution issues.[191.1] The effectiveness of bioremediation depends on factors such as pollutant concentration, microbial population availability, and environmental conditions like temperature and pH.[195.1] This approach is both cost-effective and environmentally friendly, utilizing natural processes to manage pollutants at contaminated sites.[190.1] Bioremediation techniques are divided into in situ and ex situ methods. In situ bioremediation treats polluted soil at its original location, making it more economical than ex situ methods, which require off-site treatment.[196.1] In situ techniques often enhance naturally occurring microorganisms through nutrient or oxygen addition, boosting their biodegradation capabilities.[198.1] For example, bioventing, an in situ technique, uses aeration to stimulate microbial activity in unsaturated soils, effectively degrading petroleum hydrocarbons.[190.1] Biostimulation can be combined with bioaugmentation to tackle complex contamination scenarios, offering a comprehensive approach to pollution.[190.1] The choice of bioremediation technique is influenced by the nature and concentration of pollutants, the environment type, and relevant environmental policies.[196.1] Bioremediation has been successfully applied in various industries, such as leather production, where it addresses the health risks posed by heavy metals and toxic oxides from tanning processes.[189.1] The integration of advanced technologies, including the Internet of Things (IoT) and Artificial Intelligence (AI), is being explored to enhance the efficiency and monitoring of bioremediation processes.[192.1]Challenges And Limitations
Factors Affecting Efficiency
The efficiency of bioremediation is influenced by several critical factors, including the nature of the pollutants, environmental conditions, and the characteristics of the microbial communities involved. One significant limitation is that bioremediation is primarily effective for compounds that are biodegradable and can undergo rapid and complete degradation. In some cases, the by-products of biodegradation may be more persistent or toxic than the original contaminants, complicating the remediation process.[226.1] Bioremediation is often a time-consuming process compared to other treatment methods, such as excavation and incineration, which can result in delays in achieving effective remediation outcomes.[227.1] The efficiency of microbial bioremediation is influenced by various environmental factors, including pH, temperature, and nutrient availability. Specifically, soil pH, which reflects the acidity, basicity, and alkalinity of the environment, significantly impacts microbial metabolic activity and can either enhance or hinder the removal process of contaminants. Measurements of soil pH can indicate the potential for microbial growth, with both higher and lower pH values generally yielding inferior results in metabolic processes.[235.1] Additionally, the rate of biodegradation is known to decrease with lower temperatures, while it accelerates with increasing temperatures, indicating that microorganisms require an optimal temperature range for effective hydrocarbon degradation.[234.1] Moreover, the inherent characteristics of the microbial communities present at contaminated sites can impact the degradation process. Indigenous microorganisms may lack the necessary capabilities to degrade certain complex pollutants, necessitating strategies such as bioaugmentation or genetic engineering to introduce specialized microbes.[232.1] The competition between indigenous and introduced strains can further limit the success of bioremediation efforts, as exogenous strains may struggle to survive due to nutrient deficiencies or competition for resources.[229.1]Regulatory Considerations
The implementation of bioremediation projects is significantly influenced by various federal environmental regulations that have been enacted over the past two decades. Key legislative acts, including the Resource Conservation and Recovery Act (RCRA), the Comprehensive Environmental Response, Compensation and Liability Act (CERCLA), the Toxic Substances Control Act (TSCA), and the Federal Plant Pest Act (FPPA), are crucial in shaping the regulatory landscape for bioremediation practices.[254.1] These regulations aim to control the release of pollutants into the air, water, and land, thereby impacting the bioremediation industry and its potential markets.[252.1] The provisions of these acts are essential to understanding their effects on bioremediation applications, particularly in the context of hazardous waste management.[254.1] One of the primary challenges faced by the bioremediation industry is the need for lawmakers to balance regulations that foster innovation while ensuring the protection of human health and the environment.[255.1] Current regulations may impose limitations that hinder the adoption of genetically modified microorganisms (GMMs) and other advanced bioremediation techniques, which could otherwise enhance the effectiveness of contaminant degradation.[255.1] Furthermore, bioremediation processes often require more time compared to traditional remediation methods, such as excavation and incineration, which can deter stakeholders from choosing this eco-friendly approach.[256.1] Bioremediation is an eco-friendly approach that utilizes living organisms, primarily microorganisms, to break down or metabolize contaminants in soil and water, offering a sustainable alternative to traditional remediation methods.[257.1] Traditional remediation techniques often prioritize immediate containment, which can overlook the potential long-term ecological benefits associated with bioremediation.[259.1] The decision to adopt either bioremediation or traditional methods should be made on a case-by-case basis, taking into account factors such as the type and extent of contamination, site-specific conditions, and project objectives.[259.1] By integrating the strengths of both bioremediation and traditional methods, hybrid strategies can provide a more comprehensive and effective solution for site remediation, balancing the need for rapid containment with long-term sustainability.[259.1]Future Directions
Integrated Bioremediation Strategies
The future of bioremediation is increasingly focused on the integration of advanced technologies such as synthetic biology, genetic engineering, and metagenomics to enhance the effectiveness of remediation strategies. The development of robust and versatile microbial communities capable of degrading a wide range of pollutants is essential for addressing the growing environmental challenges posed by hazardous contaminants.[264.1] Advances in synthetic biology are enabling the design of tailor-made organisms specifically for bioremediation purposes, showcasing current achievements in xenobiotic clean-up while also highlighting the limitations that need to be overcome for real-world applications.[276.1] Metagenomic approaches have emerged as pivotal tools in bioremediation, providing deeper insights into the structure and function of microbial communities involved in pollutant degradation. These approaches facilitate the discovery of novel systems for microbial remediation and enable the efficient analysis of large amounts of sequence data, which is crucial for characterizing biomes for their bioremediation potential.[266.1] Furthermore, the integration of synthetic biology with metabolic engineering at the community level is vital for optimizing synthetic consortia, which can enhance bioprocessing applications.[273.1] The use of genetically engineered microbes (GEMs) represents a significant advancement in bioremediation, as these organisms are created by introducing stronger proteins into bacteria through biotechnology or genetic engineering to enhance their pollutant-degrading capabilities.[267.1] Additionally, the creation of artificial microbial consortia allows for the distribution of multiple catalytic enzyme expression pathways across different strains, enabling the co-culturing of these strains to effectively degrade complex compounds that are otherwise resistant to decomposition.[275.1]Innovations in Bioremediation Technologies
Recent advancements in bioremediation technologies have highlighted the effectiveness of eco-friendly methods in mitigating the impacts of anthropogenic pollutants resulting from industrial and agricultural activities. Compared to traditional chemical and physical remediation methods, bioremediation is recognized for being more environmentally sustainable, easier to implement, and less invasive.[260.1] Innovative approaches, such as the integration of nanotechnology with bioremediation, have emerged as a promising direction for enhancing pollutant degradation. Nanobioremediation utilizes nanomaterials synthesized by microorganisms and plants to improve the efficiency of pollutant removal during environmental restoration processes.[263.1] The application of nanomaterials has been shown to benefit microbial growth, heavy metal tolerance, and photosynthetic performance, thereby facilitating more effective bioremediation strategies.[269.1] Furthermore, the combination of nanomaterials with traditional bioremediation methods holds immense potential for addressing specific environmental contaminants more effectively.[283.1] Research has also focused on the bioremediation of per- and polyfluoroalkyl substances (PFAS), which are persistent environmental pollutants. Key findings indicate that microbial community composition, field application, and the presence of co-substrates significantly influence the biotransformation and fate of PFAS in contaminated soil and water systems.[262.1] Additionally, the symbiotic relationships between algae and bacteria have been identified as beneficial for reducing microalgae growth inhibition and enhancing PFAS removal.[262.1] Moreover, the immobilization technique has been recognized for promoting microbial development, which enhances the capacity of bacterial cells for environmental adaptation and reduces microbial loss to the environment.[261.1] This technique is particularly relevant in the context of marine pollution management, where establishing successful oil-degrading microbial consortia is crucial.[261.1] Despite these advancements, challenges remain in the implementation of nanomaterials for bioremediation. Issues such as the toxicology, transport, fate, and bioaccumulation of nanomaterials need further exploration to ensure responsible and sustainable practices.[272.1] Additionally, while the integration of nanotechnology with bioremediation presents significant opportunities, it also necessitates careful consideration of potential inhibitory effects on microbial growth.[271.1]References
[1] Bioremediation - an overview | ScienceDirect Topics — Bioremediation is a process used to treat contaminated water, soil, and subsurface material by stimulating microbial growth to degrade the target pollutants. Bioremediation is regarded as an ecofriendly and inexpensive process. However, efficient microbial remediation of heavy metals resulted in trapping of the metals within the cells using
[3] Bioremediation - an overview | ScienceDirect Topics — Bioremediation is defined as an environmentally friendly process for the removal of harmful pollutants from soil, water, and air using microbes (Alexander and Loehr, 1992). ... 11.3.1. Bioremediation techniques: an overview. Bioremediation alludes to any procedure used to dispose of unwanted impacts of contaminations from climate. It is 11.3.1. Bioremediation techniques: an overview. Bioremediation alludes to any procedure used to dispose of unwanted impacts of contaminations from climate. It is
[4] Bioremediation. An overview - De Gruyter — A brief outline of the development of bioremediation technologies is presented. The major features and limitations are discussed, and an overview of the current state of the art in field applications is sketched.
[7] Soil Remediation: Biological Approaches, Regulatory Frameworks, and ... — In the current scenario of environmental upheaval, integrating bioremediation practices into the circular economy framework can help optimize resource use, minimize environmental impacts, and create more resilient and sustainable systems for managing contaminated sites and preserving environmental quality (Tiwari et al. 2023). By leveraging the
[14] Comprehensive approaches to heavy metal bioremediation: Integrating ... — Moreover, robust policy frameworks and proactive public engagement are crucial to ensuring the responsible implementation of bioremediation strategies. The future of HMs cleanup hinges on a balanced integration of scientific advancements, regulatory oversight, and community involvement to achieve large-scale, sustainable environmental remediation.
[16] 21 Pros And Cons Of Bioremediation — Enhances Public Perception Bioremediation reflects a commitment to environmentally responsible practices, which can significantly enhance public perception of organizations or projects that implement it.
[17] Public Viewpoints on Bioremediation: Acceptance & Impact — Highlighting successful projects, like cleaning up oil spills with bacteria or treating wastewater using plant-based systems, can showcase its effectiveness and inspire confidence. The Role of Policy and Regulation: Strong policies and regulations are essential for ensuring the safe and responsible implementation of bioremediation.
[26] Case Studies: Successful Wastewater Treatment through Bioremediation ... — These case studies exemplify the success and potential of bioremediation as a sustainable and effective approach to wastewater treatment. From remediating PCB-contaminated rivers to cleaning up oil spills and addressing mining wastewater challenges, bioremediation has proven its worth in diverse real-world scenarios.
[28] Bioremediation Case Study - AEL Environment — Bioremediation Case Study. Project Location: Ontario, Canada ... Since the bioremediation was successful the soil was able to be re-used at the Site. By using bioremediation instead of off-site disposal, AEL reduced the cost of the remediation by more than 50%, saving the client close to $200,000.
[29] Delta Remediation — Delta Remediation From oil spill cleanups to wastewater treatment, landfill remediation, and heavy metal cleanup, explore how microorganisms, fungi, and plants work together to create sustainable solutions. Case Study: Exxon Valdez Oil Spill (1989) In the Exxon Valdez oil spill, bioremediation techniques introduced oil-degrading bacteria for a responsible and sustainable cleanup, showcasing an eco-friendly approach to industrial accidents. Contact Delta Remediation Delta Remediation is at the forefront, offering rapid bioremediation techniques. Join us in our mission for a cleaner, healthier environment with Delta Remediation’s innovative bioremediation solutions. Delta Remediation Delta Remediation, an Alberta leader in bioremediation, uses natural bacteria to degrade hydrocarbons, turning contaminants into water and CO2. © 2023 Delta Remediation - Premier In-Situ & Ex-Situ Bioremediation Providers.
[40] Thirty Years and Counting: Bioremediation in Its Prime? — Extract. Bioremediation in its formal sense, meaning any use of living organisms to degrade wastes, has been practiced since humans first populated the world and had to dispose of their trash. Without knowing about the microorganisms in soil and water, people relied on them to destroy waste products from human domestic, agricultural, and industrial activities by converting them to carbon
[41] History of Bioremediation - Study.com — The history of bioremediation goes back to the 1940s. Back then, scientists understood that petroleum hydrocarbons could be degraded (broken down) by various microbes.
[42] HISTORY - bioremediation — The history of bioremediation in response to the Exxon Valdez oil spill can be divided into three development periods: the "Courtship" period until 1989, the "Honeymoon" period from 1989 until 1991, and the "Establishment" period since 1992. (3.3)
[43] Bioremediation of Exxon Valdez Oil Spill | About EPA | US EPA — EPA informed Exxon on July 26 that it would support a proposal by the company to use bioremediation to aid in cleaning up the oil spilled from the Exxon Valdez in Prince William Sound. In a letter to Exxon, EPA provided information that would support the use of bioremediation as a cleanup technique for the Valdez oil spill.
[44] Oil Biodegradation and Bioremediation: A Tale of the Two Worst Spills ... — The devastating environmental impacts of the Exxon Valdez spill in 1989 and its media notoriety made it a frequent comparison to the BP Deepwater Horizon spill in the popular press in 2010, even though the nature of the two spills and the environments impacted were vastly different. Fortunately, unlike higher organisms that are adversely impacted by oil spills, microorganisms are able to
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[46] Exxon Valdez | Oil Spills | Damage Assessment, Remediation, and ... — Ultimately, the Exxon Valdez spill resulted in a close examination of the status of oil spill prevention, response, and cleanup in the United States. One result was the passage of the Oil Pollution Act of 1990, which led to the establishment of NOAA's DARRP program. Learn more about the Exxon Valdez spill assessment and restoration activities.
[64] Toward an ecology of disasters: a primer for the pursuit of ecological ... — We first examine how ecologists have engaged in the disaster cycle, focusing on trends in training and education, research funding, and the prevalence of community engagement in ecological research.
[65] A comprehensive review of sustainable bioremediation techniques: Eco ... — Recent advancements in the field have underscored the effectiveness of bioremediation in mitigating the impacts of anthropogenic pollutants resulting from industrial and agricultural processes (Raajasubramanian et al., 2015).Compared to traditional chemical and physical remediation methods, bioremediation is more eco-friendly, easier to implement, and less invasive.
[66] Restoration and repair of Earth's damaged ecosystems — 1. Introduction. The pace of ecosystem destruction from anthropogenic and natural impacts is rapid, with billions of US dollars spent annually to restore damaged ecosystems .As most of the Earth is impacted either directly or indirectly by people [], restoration has emerged as one of the most important tools to stem the biodiversity crisis and repair damaged ecosystems [].
[67] Milestones in EPA and Environmental History — Milestones in EPA and Environmental History | US EPA About EPA About EPA Milestones in EPA and Environmental History Milestones in U.S. EPA and Environmental History The fire helped spur an avalanche of water pollution control activities such as the Clean Water Act and the Great Lakes Water Quality Agreement. Milestones in U.S. EPA and Environmental History EPA Takes National Action on Air Quality EPA Defines Air Pollution Danger Levels EPA Bans DDT EPA Sets New National Air Pollution Standard for Lead Launch of EPA Radon Program EPA Strengthens National Air Quality Standards EPA Proposes First Carbon Pollution Standard for New Power Plants EPA Updates Air Pollution Standards for Oil and Natural Gas EPA Strengthens Air Standards for Fine Particles, Reducing Harmful Soot Pollution EPA's Administrators
[76] 12 Types Of Bioremediation - Applications And Benefits — Intrinsic and Extrinsic Bioremediation: An Overview. Understanding the types of bioremediation necessitates a grasp of its two overarching categories—intrinsic (natural) and extrinsic (enhanced) bioremediation. Intrinsic bioremediation capitalizes on the inherent ability of native organisms to mitigate pollution, functioning without human
[77] Understanding the Different Types of Bioremediation — Types of Bioremediation: A Detailed Overview. Classic bioremediation technologies have been an integral component in combating environmental hazards such as soil contamination and oil spills in our oceans. Let us examine the three primary types of bioremediation that have been a core of environmental restorations:
[79] Bioremediation - Definition, Types, Application - Biologynotesonline.com — Bioremediation is a process used to clean up and detoxify polluted sites by utilizing microorganisms, plants, or their enzymes to break down and degrade environmental contaminants. Bioremediation offers a sustainable and environmentally friendly approach to address pollution issues, as it relies on natural biological processes to remediate contaminated sites. Bioremediation is the use of microorganisms, plants, or their enzymes to clean up and detoxify polluted environments by breaking down and degrading contaminants. A slurry bioreactor is a vessel and apparatus used to create a three-phase (solid, liquid, gas) mixing condition to increase the rate of bioremediation of soil-bound and water-soluble pollutants as a water slurry of contaminated soil and biomass (typically indigenous microorganisms) capable of degrading target contaminants.
[80] Phytoremediation technologies and their mechanism for removal of heavy ... — Plants associated with the process of phytoremediation. The selection criteria for the plants used in phytoremediation are that they should be highly metal tolerant and have a short life cycle, broad distribution, large biomass, and a translocation factor (TF) greater than 1 (Mazumdar and Das, 2015). Some plant species are more suitable for
[87] Factors Influencing the Bacterial Bioremediation of Hydrocarbon ... — 7.2.6. Effect of Temperature. The temperature has a significant effect on the rate of bacterial growth, the activity of the enzymes, the chemistry of the pollutants, physiology, and diversity of the bacterial community responsible for degradation processes . Thus, temperature is considered an important factor in biological remediation
[88] Effectiveness of biostimulation through nutrient content on the ... — Among the eleven, eight factors had the positive effect on phenanthrene removal which confirms the biostimulation of phenanthrene biodegradation by nutrient addition, but Braddock et al. (1997) in their research for bioremediation of hydrocarbon-contaminated arctic soils showed the most biostimulation in the less concentration of nutrients .
[101] Innovative remediation strategies for persistent organic pollutants in ... — Innovative remediation techniques that may successfully remove POPs from soil and water are crucial for safeguarding human health and the environment from these contaminants (Camacho-Jiménez et al., 2023).The objective is to provide a thorough review of cutting-edge POPs in soil and water remediation techniques. The article is broken down into
[103] Recent Strategies for Natural Bioremediation of Emerging Pollutants ... — Green bioremediation is an innovative and rapidly expanding technique that holds great promise for tackling the issue of toxic waste in polluted environments. Our planet is burdened with a wide array of contaminants, ranging from heavy metals and polychlorinated biphenyls to plastics and agrochemicals. These pollutants persist in the environment due to their resistance to biodegradation
[104] Fungal bioremediation approaches for the removal of toxic pollutants ... — Mycoremediation is a biological remediation method that eliminates or breaks down pollutants and toxins from soil, water, and even the air by using specific fungi, especially mushrooms. This method falls under the category of bioremediation, which refers to the use of organisms to eliminate or reduce pollutants (Khatua et al., 2023). Later
[116] Bioremediation - Wikipedia — Bioremediation broadly refers to any process wherein a biological system (typically bacteria, microalgae, fungi in mycoremediation, and plants in phytoremediation), living or dead, is employed for removing environmental pollutants from air, water, soil, flue gasses, industrial effluents etc., in natural or artificial settings. The natural ability of organisms to adsorb, accumulate, and degrade common and emerging pollutants has attracted the use of biological resources in treatment of contaminated environment. In comparison to conventional physicochemical treatment methods bioremediation may offer advantages as it aims to be sustainable, eco-friendly, cheap, and scalable.
[117] Bioremediation: Types, Advantages, and Risks • Microbe Online — The delivery mechanisms commonly used are: Good vertical recirculation. Horizontal good recirculation. ... So, based on these factors there are seven different types of bioremediation; in situ bioremediation, phytoremediation, mycoremediation, ex situ bioremediation, biosimulation, and bioaugumentation.
[118] Introduction to Bioremediation - Microbe Notes — Phytoremediation is a bioremediation process that uses various types of plants to remove, transfer, stabilize, and/or destroy contaminants in the soil and groundwater. There are several different types of phytoremediation mechanisms. Rhizosphere biodegradation.
[119] 12 Types Of Bioremediation - Applications And Benefits — Bioremediation is a cost-effective, eco-friendly solution for environmental restoration, reducing financial burdens often associated with traditional remediation methods. For instance, adding specific nutrients to boost microbial activity or introducing pollutant-degrading microorganisms to the contaminated site falls under extrinsic bioremediation. Bioventing, a subset of extrinsic bioremediation, utilizes aeration to energize microbial activities in unsaturated soil, accelerating the degradation of pollutants, notably petroleum hydrocarbon contaminants. Moreover, biostimulation can be synergized with other remediation strategies like bioaugmentation or bioventing when dealing with complex contamination scenarios, enhancing its effectiveness and providing a more holistic solution to environmental pollution. At AOTC, we harness the power of these bioremediation techniques to offer tailored, effective, and eco-friendly environmental remediation services.
[120] Combining phytoremediation with bioenergy production: developing a ... — The process of selecting plant species must consider all the underlying suitability criteria for the plant species and determine the most suitable fit. A multi-criteria decision analysis (MCDA) tool may satisfy this requirement. It provides a platform to evaluate all the complex suitability criteria for different plant species in a
[121] Phytoremediation: Mechanisms, plant selection and enhancement by ... — The extraction potential of plant species is mainly determined by plant biomass and the concentration of HMs in aboveground plant tissues (Li et al., 2010). Therefore, a best suited phytoremediation species not only need to tolerate and effectively absorb HMs but also be fast-growing with high biomass production and provide economic benefits
[122] Factors affecting bioremediation, Role of plant roots and associated ... — Factors affecting bioremediation Various factors affect bioremediation, such as contaminant concentration, availability of the microbes, and environmental factors such as temperature, pH, the presence of oxygen or other electron acceptors, soil type, and nutrients status (Vidali et al. 2001, Parsons Corporation 2004, ICSCS 2006).
[127] Effect of Initial pH on the Bioremediation of Crude Oil Polluted Water ... — The optimal pH value for the bioremediation process is at pH 6, but microbes will die at pH range of 8 to 10 . Dissolved oxygen at the two research stations are 7.55 mg/l and 9.7 mg/l
[128] The Effect of Soil pH on Bioremediation of Polycyclic Aromatic ... — Environmental fate of polycyclic aromatic hydrocarbons (PAHs) is a significant issue raising interest in bioremediation. Soil microorganism plays a vital role in degradation of PAHs and uses various metabolic pathways for degradation process. The effect of soil pH on degradation of PAH with a view to manipulating soil pH to enhance the bioremediation of PAH's was studied. The degradation
[130] The Role of Soil pH in Plant Nutrition and Soil Remediation — In the natural environment, soil pH has an enormous influence on soil biogeochemical processes. Soil pH is, therefore, described as the "master soil variable" that influences myriads of soil biological, chemical, and physical properties and processes that affect plant growth and biomass yield. This paper discusses how soil pH affects processes that are interlinked with the biological
[134] (PDF) Exploring the Role of Plants in Bio-remediation: Harnessing ... — This research delves into the diverse mechanisms by which plants contribute to bioremediation, including phytoremediation, rhizofiltration, and phytoextraction.
[135] Phytoremediation: Mechanisms, plant selection and enhancement by ... — This review article summarizes existing information and synthesizes the recent findings on plant species suitable for use in phytoremediation through utilizing different mechanisms, aids that can enhance the efficiency of phytoremediation processes, and strengths and limitations that comes with the application of this technique.
[136] Phytoremediation of Cadmium: Physiological, Biochemical, and Molecular ... — Plants' development via genetic engineering tools, like enhanced metal uptake, metal transport, Cd accumulation, and the overall Cd tolerance, unlocks new directions for phytoremediation. In this review, we outline the physiological, biochemical, and molecular mechanisms involved in Cd phytoremediation.
[137] Biochemical and Molecular Mechanisms of Plant-Microbe-Metal ... — This review presents the recent advances and applications made hitherto in understanding the biochemical and molecular mechanisms of plant-microbe interactions and their role in the major processes involved in phytoremediation, such as heavy metal detoxification, mobilization, immobilization, transformation, transport, and distribution.
[141] Synthetic biology tools for environmental protection — Computational methods running in conjunction with synthetic biology approaches have found different applications in bioremediation studies. Manipulation of biodegradative pathways has been introduced as one of the most promising ways to improve the ability of microbes to decontaminate wastes at large scales (Sanghvi et al., 2020).
[143] How synthetic biology can help bioremediation - ScienceDirect — Biology offers enormous potential as a tool to develop microbial and plant-based solutions to remediate and restore our environment. Advances in synthetic biology are unlocking this potential enabling the design of tailor-made organisms for bioremediation.
[159] A comprehensive review of sustainable bioremediation techniques: Eco ... — Bioremediation, an advanced and environmentally sustainable technology, utilizes biological microorganisms to mitigate pollution. This review combines insights from two perspectives: one focusing on the mechanisms, applications, and types of bioremediation, and the other examining the transformative potential of integrating Internet of Things (IoT), Artificial Intelligence (AI), and biosensors
[168] Delta Remediation — Delta Remediation From oil spill cleanups to wastewater treatment, landfill remediation, and heavy metal cleanup, explore how microorganisms, fungi, and plants work together to create sustainable solutions. Case Study: Exxon Valdez Oil Spill (1989) In the Exxon Valdez oil spill, bioremediation techniques introduced oil-degrading bacteria for a responsible and sustainable cleanup, showcasing an eco-friendly approach to industrial accidents. Contact Delta Remediation Delta Remediation is at the forefront, offering rapid bioremediation techniques. Join us in our mission for a cleaner, healthier environment with Delta Remediation’s innovative bioremediation solutions. Delta Remediation Delta Remediation, an Alberta leader in bioremediation, uses natural bacteria to degrade hydrocarbons, turning contaminants into water and CO2. © 2023 Delta Remediation - Premier In-Situ & Ex-Situ Bioremediation Providers.
[170] A comprehensive review of sustainable bioremediation techniques: Eco ... — This leads to a better understanding of contamination sources and more effective remediation strategies. AI models can predict the outcomes of different bioremediation approaches, helping to select the most efficient and cost-effective methods by considering variables like pollutant type, environmental conditions, and microbial activity.
[171] Role of Microbial Enzymes in the Bioremediation of Pollutants: A Review ... — Bioremediation is a microorganism mediated transformation or degradation of contaminants into nonhazardous or less-hazardous substances. The employability of various organisms like bacteria, fungi, algae, and plants for efficient bioremediation of pollutants has been reported . The involvement of plants in the bioremediation of pollutants
[172] 10 - The role of microorganism in bioremediation for sustainable ... — The role of microorganism in bioremediation for sustainable environment management - ScienceDirect Skip to main contentSkip to article Journals & Books Help Search My account Sign in Access through your organization Purchase PDF Search ScienceDirect Article preview Abstract Cited by (25) Bioremediation of Pollutants From Genetic Engineering to Genome Engineering 2020, Pages 227-249 10 - The role of microorganism in bioremediation for sustainable environment management Author links open overlay panelArun Kumar Pal 1 †, Jyotsna Singh 1 †, Ramendra Soni 1 †, Pooja Tripathi 2, Madhu Kamle 3, Vijay Tripathi 1, Pradeep Kumar 3 Show more Outline Add to Mendeley Share Cite https://doi.org/10.1016/B978-0-12-819025-8.00010-7Get rights and content Abstract Bioremediation is a biological mechanism, used by microorganisms for the degradation of pollutants. Bioremediation is highly involved in degradation, eradication, immobilization, or detoxification of diverse chemical wastes and physical hazardous materials from the environment through the all-inclusive and action of microorganisms. The main principle is degrading and transforming pollutants such as hydrocarbons, oil, heavy metal, pesticides, dyes, etc., which is carried out in an enzymatic way through metabolization and helps solve many environmental problems. Currently, different methods are applied in different parts of the world; some common ones include biostimulation, bioaugementation, bioventing, biopiles, and bioattenuation.
[173] Microbial remediation of polluted environment by using recombinant — Microbial remediation of polluted environment by using recombinant E. Microbial remediation of polluted environment by using recombinant E. Microbial remediation of polluted environment by using recombinant E. The increased pollution in the environment prompted the development of genetically modified microorganisms (GEMs) for pollution abatement via bioremediation. Environmental pollution refers to the degradation of the natural environment because of the introduction of pollutants. In contemporary bioremediation methods, genetically modified organisms play a pivotal role in addressing environmental pollution, particularly in situations where natural bacterial populations are insufficient to handle specific pollutants. In the current bioremediation technique, genetically modified organisms are employed to efficiently eliminate pollutants that native bacteria are unable to decompose . Microbial remediation of polluted environment by using recombinant E.
[174] A comprehensive review of sustainable bioremediation techniques: Eco ... — Bioremediation represents a cutting-edge and ecologically sustainable technology that utilizes biological microorganisms to decompose and neutralize pollutants (Ajona and Vasanthi, 2021).This technique plays a crucial role in removing environmental toxins, thereby restoring ecosystems to their natural state and preventing further contamination (Sardrood et al., 2013, Arregui et al., 2019
[176] A comprehensive review on the potential of microbial enzymes in ... — Through their catalytic reaction mechanism, microbial enzymes may degrade and eliminate harmful environmental pollutants and transform them into non-toxic forms. The principal types of microbial enzymes which can degrade most hazardous environmental contaminants include hydrolases, lipases, oxidoreductases, oxygenases, and laccases.
[177] Microbial Bioremediation: Mechanisms and Interactions Explained — Microbial Bioremediation: Mechanisms and Interactions Explained - BiologyInsights Microbial bioremediation offers a promising approach to environmental pollution by utilizing microorganisms to degrade or transform contaminants. Microbial bioremediation mechanisms are diverse, reflecting the adaptability of microorganisms in various environments. The efficiency of bioremediation depends on factors such as the bioavailability of contaminants, environmental conditions, and the presence of specific microbial strains. Metabolic pathways are crucial to bioremediation, determining how effectively microorganisms transform pollutants into non-toxic compounds. These communities are complex networks of interacting species that work together to degrade pollutants. These interactions can enhance the metabolic potential of microbial communities, allowing them to tackle a wider array of pollutants. Such specialization can lead to a more efficient division of labor within microbial communities, where each species optimally degrades certain pollutants.
[189] An Introduction To Bioremediation And Its Applications - Environmental XPRT — Industrial Application Example of Bioremediation Bioremediation can be used in a variety of applications and industries. A few industrial application examples are provided below. Leather Production: Tanneries produce heavy metals, which in turn produce toxic oxides. The oxides can be the cause of diseases like asthma, lung cancer, paralysis
[190] 12 Types Of Bioremediation - Applications And Benefits — Bioremediation is a cost-effective, eco-friendly solution for environmental restoration, reducing financial burdens often associated with traditional remediation methods. For instance, adding specific nutrients to boost microbial activity or introducing pollutant-degrading microorganisms to the contaminated site falls under extrinsic bioremediation. Bioventing, a subset of extrinsic bioremediation, utilizes aeration to energize microbial activities in unsaturated soil, accelerating the degradation of pollutants, notably petroleum hydrocarbon contaminants. Moreover, biostimulation can be synergized with other remediation strategies like bioaugmentation or bioventing when dealing with complex contamination scenarios, enhancing its effectiveness and providing a more holistic solution to environmental pollution. At AOTC, we harness the power of these bioremediation techniques to offer tailored, effective, and eco-friendly environmental remediation services.
[191] Bioremediation - Definition, Types, Application - Biology Notes Online — Bioremediation is a process used to clean up and detoxify polluted sites by utilizing microorganisms, plants, or their enzymes to break down and degrade environmental contaminants. Bioremediation offers a sustainable and environmentally friendly approach to address pollution issues, as it relies on natural biological processes to remediate contaminated sites. Bioremediation is the use of microorganisms, plants, or their enzymes to clean up and detoxify polluted environments by breaking down and degrading contaminants. A slurry bioreactor is a vessel and apparatus used to create a three-phase (solid, liquid, gas) mixing condition to increase the rate of bioremediation of soil-bound and water-soluble pollutants as a water slurry of contaminated soil and biomass (typically indigenous microorganisms) capable of degrading target contaminants.
[192] A comprehensive review of sustainable bioremediation techniques: Eco ... — Bioremediation, an advanced and environmentally sustainable technology, utilizes biological microorganisms to mitigate pollution. This review combines insights from two perspectives: one focusing on the mechanisms, applications, and types of bioremediation, and the other examining the transformative potential of integrating Internet of Things (IoT), Artificial Intelligence (AI), and biosensors
[195] Environmental factors affecting the bioremediation potential of ... — Bioremediation processes are intricately influenced by a range of physical, chemical, and biological factors but not limited to temperature, dissolved oxygen content, and the pollutant load in the soil. Other critical determinants encompass the concentration of heavy metals and the availability of nutrients in the soil, both of which significantly impact the efficacy of bioremediation
[196] Bioremediation techniques as affected by limiting factors in soil ... — Choice of bioremediation technique depends on some factors that include nature of pollutant, concentration of pollutant, type of environment, cost of remediation technique, depth of contaminant, and environmental policies [1, 3, and 7]. The polluted soil is treated right at the site of pollution and is, therefore, more cost-effective than the ex-situ bioremediation techniques (26) . Some in-situ bioremediation techniques are enhanced by microbes present in the polluted soil. Bioremediation is uses natural processes to remove, remediate, clean, manage, recover, or solve the problem of polluted soils. Citation: Alori ET, Gabasawa AI, Elenwo CE and Agbeyegbe OO (2022) Bioremediation techniques as affected by limiting factors in soil environment.
[198] Bioremediation: using microorganisms to clean up the environment — Bioremediation is a biotechnology procedure, in which microorganisms adapted to degrade pollutants from a contaminated site are stimulated to achieve a better biodegradation rate by enrichment with fertilizers and/or oxygen. Another variation of the technology is introducing microorganisms adapted in a laboratory into the contaminated site.
[203] Bioremediation strategies for leather industrial wastewater — Recent studies have unveiled a range of bioremediation techniques that hold significant promise in addressing tannery wastewater contamination. This paper delineates the latest advancements in tannery wastewater bioremediation. ... Substances employed in leather production and contaminants released into the surrounding ecosystem (Kumar et al
[204] What are the economic benefits of biological treatment of leather ... — The biological treatment of leather wastewater offers several economic benefits. One benefit is the use of Moving-Bed Biofilm Reactor (MBBR) technology, which incorporates activated sludge and biocarriers to efficiently remove organic and nitrogen pollutants from the wastewater. Another benefit is the reduction in the use of chemicals for pH adjustment in the treatment process. Instead of
[205] Biorefining of leather solid waste to harness energy and materials—A ... — Many articles typically discuss leather waste consequences and their management approaches only. This article presents solid leather waste reutilization strategies for energy and value-added products in a biorefinery concept, building a circular economy. Such a framework would enhance the triple bottom line of any tannery industry.
[213] Bioremediation strategies for leather industrial wastewater — The degradation pathway of leather industry wastewater through bioremediation involves the use of microbial organisms to break down organic pollutants present in the wastewater.
[215] PDF — Leather industry is considered to be a sustainable industry but due to the nature of the effluents released, effects on environment are enormous. In this review we discuss the various bioremediation strategies being employed for treating leather industrial effluents in an ecofriendly manner.
[216] Microbial Bioremediation of Feather Waste for Keratinase Production: An ... — Batch cultivation of B. cereus using 1 L fermentor indicates a potential candidate for large-scale keratinase production. Thus, keratinase enzyme by degrading poultry wastes (feather) can be an alternative approach to chemical dehairing in leather industries, thus preventing environmental pollution through bioremediation.
[217] Bioremediation strategies for leather industrial wastewater — The existence of chromium and other contaminants in leather industry effluents heightens the risks of skin irritation, ulcers, and even lung cancer. Industrial guidelines strictly prohibit the discharge of sulfide or chromium into wastewater according to environmental standards, necessitating the urgent removal of these highly hazardous
[226] Advantages and limitations of bioremediation - Academic library — Limitations of bioremediation There are some limitations and challenges associated with bioremediation. It is limited to compounds that are biodegradable and susceptible to rapid and complete degradation. Sometimes, by-products of biodegradation may be more persistent or toxic than the parent compound.
[227] Challenges of bioremediation - Academic library — Bioremediation may take more time than other treatment options, such as excavation and removal of soil or incineration to remediate the contaminants (Zeyaullah et al. There are numerous limitations with electro-bioremediation technology that need to be overcome such as solubility of the pollutant and its desorption from the soil matrix, the availability of potential microorganisms at the site of contamination, the ratio between target and non-target ion concentrations, and toxic electrode effects on microbial metabolism (Virkutyte et al. Pollutants, such as petroleum hydrocarbons, polycyclic aromatic hydrocarbons and some chlorinated pesticides among others, are not easily available to the microorganisms because of their hydrophobicity and persistence in soil.googletag.cmd.push(function() { googletag.display('div-336x280_1'); });The composting efficiency depends on the type of contaminants, temperature, and soil/waste amendment ratio for bioremediation (Antizar-Ladislao et al.
[229] Engineering microbiomes for enhanced bioremediation — In this Perspective, we outline 5 important considerations for the rational design of pollutant-degrading microbiomes for enhanced bioremediation. The effectiveness of single-strain-based bioremediation is frequently limited by various factors, including the low survival rate of inoculated exogenous degrading strains due to competition with indigenous community members or nutrient deficiencies, the inability of a single strain to fully catabolize complicated pollutants, the inhibition of metabolic activities by non-target pollutants or their intermediates, and the difficulty in determining necessary exogenous nutrients for effective biostimulation [3–5]. We envision that the use of synthetic microbiomes will help to overcome existing bottlenecks in designing enhanced pollutant-degrading microbiomes, fully realizing the potential of microbial bioremediation.
[232] Microbial Bioremediation: Harnessing Microorganisms to Clean the ... — Factors such as pH, temperature, oxygen availability, and nutrient levels can influence the efficiency of microbial bioremediation. Additionally, microbial communities may not naturally possess the capacity to degrade certain complex pollutants, necessitating the use of bioaugmentation or genetic engineering to introduce specialized microbes [ 8 ].
[234] Factors Influencing the Bacterial Bioremediation of Hydrocarbon ... — In general, the rate of biodegradation decreases with decreasing temperature, while it accelerates with increasing temperature. As a result, potential bacteria need an optimal temperature range for complete hydrocarbon degradation. 7.2.7. Effect of pH. Soil pH (neutral, acidic, or alkaline) affects bacterial growth and bioremediation strategies.
[235] PDF — pH of compound which is acidity, basicity and alkalinity nature of compound, it has its own impact on microbial metabolic activity and also increase and decrease removal process. The measurement of pH in soil could indicate the potential for microbial growth . Higher or lower pH values showed inferior results; metabolic processes are highly
[252] Impact of present and future regulations on bioremediation — Search: Search Your saved search Name of saved search: Over the last two decades, at least a dozen Federal environmental statutes have been enacted and hundreds of regulations implemented to control releases of pollutants into the air, water and on land. This paper summarizes the Federal statutes (i.e., the Toxic Substances Control Act (TSCA); the Resource Conservation and Recovery Act (RCRA); the Comprehensive Environmental Response, Compensation and Liability Act (CERCLA); and the Federal Plant Pest Act (FPPA], and regulations that may impact the bioremediation industry; outlines potential markets for bioremediation that are being driven by regulations; and highlights, within the regulatory framework, promising applications for the bioremediation of hazardous wastes. US environmental regulations and policies--their impact on the commercial development of bioremediation.
[254] Environmental regulations: A brief overview of their applications to ... — The primary legislative acts of concern are the Resource Conservation and Recovery Act, the Comprehensive Environmental Response, Compensation and Liability Act, the Toxic Substance Control Act and the Federal Plant Pest Act. This paper will briefly discuss the impact on bioremediation of the key provisions of these acts.
[255] Bioremediation: Breaking Down the Regulations of Genetically Modified ... — To further develop GMMs for bioremediation, lawmakers must bal-ance regulations that allow the bioremediation industry's continued innovation while also protecting human health and the environment. This Article first reviews laws that regulate waste management and the limitations of their current technology requirements. Part III ex-
[256] Challenges of bioremediation - Academic library — Bioremediation may take more time than other treatment options, such as excavation and removal of soil or incineration to remediate the contaminants (Zeyaullah et al. There are numerous limitations with electro-bioremediation technology that need to be overcome such as solubility of the pollutant and its desorption from the soil matrix, the availability of potential microorganisms at the site of contamination, the ratio between target and non-target ion concentrations, and toxic electrode effects on microbial metabolism (Virkutyte et al. Pollutants, such as petroleum hydrocarbons, polycyclic aromatic hydrocarbons and some chlorinated pesticides among others, are not easily available to the microorganisms because of their hydrophobicity and persistence in soil.googletag.cmd.push(function() { googletag.display('div-336x280_1'); });The composting efficiency depends on the type of contaminants, temperature, and soil/waste amendment ratio for bioremediation (Antizar-Ladislao et al.
[257] Bioremediation vs. Traditional Remediation Methods: A Comparative Analysis — In this article, we will conduct a comparative analysis of bioremediation and traditional remediation methods to understand their respective advantages and limitations. Bioremediation is an eco-friendly approach that utilizes living organisms, primarily microorganisms, to break down or metabolize contaminants in soil and water.
[259] PDF — Traditional Remediation Methods: A Com-parative Analysis Nigam Reynolds* Department of Biodiversity, Suzhou University of Science and Technology, Suzhou, China Introduction In the face of environmental pollution and contamination, the choice of remediation methods is crucial for mitigating the damage caused to ecosystems. Traditional remediation methods prioritize immediate containment, often neglecting the potential long-term ecological benefits associated with bioremediation . The choice between bioremediation and traditional remediation methods should be based on a case-by-case analysis, considering factors such as the type and extent of contamination, site-specific conditions and project objectives. By integrating the strengths of both bioremediation and traditional methods, hybrid strategies aim to strike a balance between rapid containment and long-term sustainability, providing a more comprehensive and effective solution for site remediation . Văcar, Cristina L., Enikö Covaci, Somsubhra Chakraborty and Bin Li, et al.
[260] A comprehensive review of sustainable bioremediation techniques: Eco ... — Recent advancements in the field have underscored the effectiveness of bioremediation in mitigating the impacts of anthropogenic pollutants resulting from industrial and agricultural processes (Raajasubramanian et al., 2015).Compared to traditional chemical and physical remediation methods, bioremediation is more eco-friendly, easier to implement, and less invasive.
[261] Recent trends in bioremediation and bioaugmentation strategies for ... — By bridging the gap between traditional biological methods and modern technological tools, this work provides a unique perspective on enhancing the efficiency and effectiveness of bioremediation approaches, addressing critical gaps in current knowledge, and outlining pathways for future research and application in marine pollution management . Immobilization technique promotes microbial development, which enhances bacterial cells’ capacity for environmental adaptation, reduces microbial loss to the environment, and provides a significant source of bacteria for bioremediation . Halotolerant and halophilic bacteria have been effectively added as additional microbial consortium bioaugmentation for the bioremediation of PHCs. As having more varieties of microorganisms does not always translate into more effective degradation, it is crucial to look into practical approaches to establish successful marine oil-degrading microbial consortia.
[262] Advances in bioremediation strategies for PFAS-contaminated water and ... — Advances in bioremediation strategies for PFAS-contaminated water and soil - ScienceDirect Advances in bioremediation strategies for PFAS-contaminated water and soil This review aims to address these gaps by providing a comprehensive analysis of recent developments in the bioremediation of PFAS-contaminated soil and water systems. The key findings from this review include: 1) microbial community composition, field application, presence of co-substrate and cationic complexation govern biotransformation and fate of PFAS, 2) long chain PFAS are more susceptible to accumulate in the roots due to high hydrophobicity, and 3) algae-bacteria symbiotic relationships reduce microalgae growth inhibition and stimulates PFAS removal. This article is part of a special issue entitled: Emerging contaminants published in Soil & Environmental Health. For all open access content, the Creative Commons licensing terms apply.
[263] Advancements in Bioremediation: Harnessing Nanomaterials and ... — The article focuses on the advancements of bioremediation, specifically, nanobioremediation, in enhancing pollutant degradation. This study is the application of nanomaterials synthesized by microorganisms and plants to enhance efficiency in pollutant removal in the environmental restoration process.
[264] Beyond Traditional Bioremediation: The Potential of Engineered SynComs ... — The future of bioremediation lies in the continued innovation and integration of synthetic biology, genetic engineering, and environmental science. The development of more robust and versatile microbial communities capable of degrading a wide range of pollutants will be crucial in addressing the growing environmental challenges ( Pant et al
[266] Metagenomic approaches in bioremediation of environmental pollutants — Metagenomic approaches in bioremediation of environmental pollutants - ScienceDirect Metagenomics has emerged as a pivotal tool in bioremediation, providing a deeper understanding of the structure and function of the microbial communities involved in pollutant degradation. The metagenomic approach has also been applied to bioremediation, where novel systems for the microbial remediation of contaminants have been discovered (Behera et al., 2020; Gao et al., 2021; Shi et al., 2019; Xing et al., 2020). The integration of computational and bioinformatics capabilities in bioremediation studies enables the efficient analysis of large amounts of metagenomic sequence data generated in the characterization of any biome for its bioremediation potential (Nigam et al., 2023).
[267] Genetically engineered microorganisms for environmental remediation — Abstract In the recent era, the increasing persistence of hazardous contaminants is badly affecting the globe in many ways. Advances in newer remediation approaches may help enhance bioremediation's quality, while conventional procedures have failed to remove hazardous compounds from the environment. Thus, there has been a rise in the use of bioremediation due to an increase in environmental contamination, which led to the development of genetically engineered microbes (GEMs). GEMs are created by introducing a stronger protein into bacteria through biotechnology or genetic engineering to enhance the desired trait.
[269] Perspectives on nanomaterial-empowered bioremediation of heavy metals ... — The broader integration of nanomaterials in bioremediation efforts involving unicellular phototrophs may be driven by two key factors: firstly, the documented beneficial effects of nanomaterials on the growth, HM tolerance and photosynthetic performance of microorganisms, and secondly, the capability of nanomaterials to interact with HMs
[271] Nanomaterials and Microbial Compatibility - Nano‐Bioremediation for ... — The chapter also addresses the antagonistic mechanisms, where nanomaterials exert inhibitory effects and unintended consequences on microbial growth, and discusses the challenges associated with the development and implementation of nanomaterials, emphasizing the importance of responsible and sustainable nanotechnology practices.
[272] Nano-bioremediation of environmental contaminants: applications ... — There are however many limitations to using nanomaterials for bioremediation and hence, their toxicology, transport, fate, and bioaccumulation needs to be further explored and understood [116
[273] Towards synthetic microbial consortia for bioprocessing — The integration of synthetic biology with metabolic engineering at the community level is vital to our ability to apply system-level approaches to building and optimizing synthetic consortia for bioprocessing applications. This review details new methods, tools and opportunities that together have the potential to enable a new paradigm of
[275] Construction of microbial consortia for microbial degradation of ... — Microbial consortia bioremediation and reuse of complex compounds. Creating an artificial microbial consortia system distributes the desired multiple catalytic enzyme expression pathways to different strains, and then co-culturing all strains to complete the task (Zhang and Stephanopoulos, 2016; Li Z. et al., 2019).The microbial consortia can degrade complex compounds that cannot be decomposed
[276] How synthetic biology can help bioremediation - ScienceDirect — Advances in synthetic biology are unlocking this potential enabling the design of tailor-made organisms for bioremediation. In this article, we showcase examples of xenobiotic clean-up to illustrate current achievements and discuss the limitations to advancing this promising technology to make real-world improvements in the remediation of
[283] Nano-bioremediation of environmental contaminants: applications ... — The application of single technology is inappropriate for the remediation of the contaminants. The combination of the nanomaterials and bioremediation has immense potential to be effective and sustainable (Rizwan, Singh, Mitra, & Morve, 2014).Keeping this in mind, application of nanotechnology with biological processes is found beneficial.