<i>Punica granatum</i> (pomegranate) carpellary membrane and its modified form used as adsorbent for removal of cadmium (II) ions from aqueous solution

Abstract

Research Article| November 10 2017 Punica granatum (pomegranate) carpellary membrane and its modified form used as adsorbent for removal of cadmium (II) ions from aqueous solution Suman Saini; Suman Saini 1Department of Chemistry, Manav Rachna International University (Faculty of Engineering & Technology), Sector-43, Delhi-Surajkund Road, Aravali Hills, Faridabad, Haryana 121004, India Search for other works by this author on: This Site PubMed Google Scholar Rajeev Kumar; Rajeev Kumar 1Department of Chemistry, Manav Rachna International University (Faculty of Engineering & Technology), Sector-43, Delhi-Surajkund Road, Aravali Hills, Faridabad, Haryana 121004, India E-mail: rajeevkumar.fet@mriu.edu.in Search for other works by this author on: This Site PubMed Google Scholar Jyoti Chawla; Jyoti Chawla 1Department of Chemistry, Manav Rachna International University (Faculty of Engineering & Technology), Sector-43, Delhi-Surajkund Road, Aravali Hills, Faridabad, Haryana 121004, India Search for other works by this author on: This Site PubMed Google Scholar Inderpreet Kaur Inderpreet Kaur 2Department of Chemistry, Centre of Advanced Study, Guru Nanak Dev University, Amritsar, India Search for other works by this author on: This Site PubMed Google Scholar Journal of Water Supply: Research and Technology-Aqua (2018) 67 (1): 68–83. https://doi.org/10.2166/aqua.2017.026 Article history Received: February 15 2017 Accepted: September 25 2017 Views Icon Views Article contents Figures & tables Video Audio Supplementary Data Share Icon Share Facebook Twitter LinkedIn MailTo Tools Icon Tools Cite Icon Cite Permissions Search Site Search Dropdown Menu toolbar search search input Search input auto suggest filter your search All ContentAll JournalsThis Journal Search Advanced Search Citation Suman Saini, Rajeev Kumar, Jyoti Chawla, Inderpreet Kaur; Punica granatum (pomegranate) carpellary membrane and its modified form used as adsorbent for removal of cadmium (II) ions from aqueous solution. Journal of Water Supply: Research and Technology-Aqua 1 February 2018; 67 (1): 68–83. doi: https://doi.org/10.2166/aqua.2017.026 Download citation file: Ris (Zotero) Reference Manager EasyBib Bookends Mendeley Papers EndNote RefWorks BibTex Abstract Punica granatum carpellary membrane (PGCM) has been chemically modified with 2,4-dinitrophenylhydrazine by one step reaction process. Pristine PGCM and modified Punica granatum carpellary membrane (MPGCM) have been employed as adsorbents for removal of cadmium (II) ions from aqueous solution. Modification on the surface of PGCM was characterized by Fourier transform infrared, scanning electron microscope, energy dispersive X-ray spectroscopy and X-ray diffraction techniques. Removal of Cd (II) ions was carried out at various optimized conditions, i.e. adsorbent dose (20 mg/l), pH (7), contact time (2 h), and temperature (303 K). The Langmuir isotherm model was the best fit with a high value of regression coefficient (R2 = 0.991–0.999) compared with the Freundlich and Temkin models. Langmuir maximum adsorption capacity for cadmium was found to be 111.11 mg/g for PGCM and 142.85 mg/g for MPGCM. Kinetics of adsorption of cadmium onto MPGCM was best described by pseudo-second-order kinetics model compared with pseudo-first-order. The negative value of free energy change showed that adsorption was highly spontaneous and favorable. Also the positive value of entropy and enthalpy showed that the process of adsorption was associated with increased randomness and endothermic in nature. Mechanism of removal of cadmium ions from water by MPGCM has also been explicated. 2,4-dinitrophenylhydrazine, adsorption, cadmium (II) ions, Langmuir isotherm, Punica granatum carpellary membrane, thermodynamic parameters © IWA Publishing 2018 You do not currently have access to this content.