Adsorption of Zn (II) from aqueous solution by using chitin extracted from shrimp shells

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How to Cite: Adsorption of Zn (II) from aqueous solution by using chitin extracted from shrimp shells, Jentashapir J Health Res. Online ahead of Print ; 5(3):131-139.

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Jentashapir Journal of Health Research: 5 (3); 131-139
Published Online: July 5, 2013
Article Type: Research Article

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Abstract

Background: Chitin and its derivatives (chitosan) are natural biopolymer produced from crustacean shell, which due to their active functional groups such as amine and hydroxyl have high ability to absorb heavy metals from water and wastewater. The aim of this study was to investigate zinc removal from aqueous solutions by using chitin extracted from shrimp shells.

Material and methods: To study the removal of zinc, chitin extracted from shrimp shells was used as biosorption in a batch system. In addition, the influence of pH, initial metal concentration, amount of adsorbent and contact time on adsorption process was investigated.

Results: The results of this research showed that the absorption capacity of zinc closely depended on the pH of solution, as zinc absorption concentration increased in terms of mg/g with increasing pH. The results of equilibrium studies revealed that zinc absorption process on the extracted chitin was desirable and followed the Freundlich isotherm model and pseudo second kinetic model. Moreover, Fourier Transform Infrared Spectroscopy (FTIR) results indicated that functional groups such as amine (-NH2 (and hydroxyl (-OH) had the highest effect on adsorption of zinc.

Background: Chitin and its derivatives (chitosan) are natural biopolymer produced from crustacean shell, which due to their active functional groups such as amine and hydroxyl have high ability to absorb heavy metals from water and wastewater. The aim of this study was to investigate zinc removal from aqueous solutions by using chitin extracted from shrimp shells.

Material and methods: To study the removal of zinc, chitin extracted from shrimp shells was used as biosorption in a batch system. In addition, the influence of pH, initial metal concentration, amount of adsorbent and contact time on adsorption process was investigated.

Results: The results of this research showed that the absorption capacity of zinc closely depended on the pH of solution, as zinc absorption concentration increased in terms of mg/g with increasing pH. The results of equilibrium studies revealed that zinc absorption process on the extracted chitin was desirable and followed the Freundlich isotherm model and pseudo second kinetic model. Moreover, Fourier Transform Infrared Spectroscopy (FTIR) results indicated that functional groups such as amine (-NH2 (and hydroxyl (-OH) had the highest effect on adsorption of zinc.

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© 2013, Jentashapir Journal of Health Research. This is an open-access article distributed under the terms of the Creative Commons Attribution-NonCommercial 4.0 International License (http://creativecommons.org/licenses/by-nc/4.0/) which permits copy and redistribute the material just in noncommercial usages, provided the original work is properly cited.

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