Plastics degradation by microbes: A sustainable approach

TLDR

Plastics are ubiquitous in modern society but their accumulation in land and sea threatens ecosystems and human health, necessitating biodegradable solutions. This review aims to examine the classification of plastics, their degradation and biodegradation pathways, and the factors influencing microbial degradation. It surveys plastics based on thermal and biodegradable properties, outlines degradation and biodegradation types, characterizes biodegradation processes, and evaluates influencing factors. The review concludes that microbial degradation offers a promising green chemistry approach to eliminate harmful plastics from the environment.

Abstract

Plastics play an important part in every sector of economy all over the world due to their extensive use in agriculture, building and construction, health and consumer goods. They are the backbone of many industries because they are used in the manufacturing of different products including defense materials, sanitary wares, tiles, plastic bottles, artificial leather and different other household items. Plastics are also used in packaging of food items, pharmaceuticals, detergents, and cosmetics. Excessive use of plastics poses a serious threat to the ecosystem and human life on the planet. Plastics accumulation on land and sea has aroused interest to degrade these polymers. There is a need to use adequate biodegradable methods in order to reduce plastics burden from the environment. In order to overcome plastics associated environmental problems, understanding of the interaction between microbes and polymers is of prime importance. Many living organisms but predominantly microorganisms have evolved strategies to survive and degrade plastics. The present review focuses on the types of plastics on the basis of thermal and biodegradable nature, degradation and biodegradation types, types of degradable plastics, characterization of biodegradation, and factors affecting biodegradation. Plastic degradation and bioremediation potential make these microorganisms propitious for green chemistry to eliminate harmful plastics from the ecosystem.