The use of chitin shrimp shells for the biosorption of zinc from aqueous solutions

Document Type : Research Paper

Authors

1 Ahvaz JundiShapur University of Medical Sciences

2 Ahvuz Jundishapur University of Medical Sciences

Abstract

The removal of zinc ions from aqueous solutions on the chitin extracted of shrimp shells has been studied by using batch adsorption method. Experiments were performed as a function of initial pH (3-7), initial metal concentration (50-500mg/l), and adsorbent dose (0/5-10 gr) at 25°C. .The equilibrium metal uptake was increased and percentage biosorption was decreased with an increase in the initial concentration. So, the data showed that optimum pH for efficient biosorption of zinc by chitin was 7. The pseudo first order and pseudo second order kinetic models were used to describe the kinetic data. The dynamic data fitted with the pseudo second order kinetic model for zinc. So, Experimental data obtained were tested with the adsorption models like Langmuir and Freundlich models and Biosorption isothermal data were well correspond by Freundlich model. So that chitin extracted of shrimp shells relatively high sorption capacity, when comparing with other sorbents that was evaluated as 270.270 mg/g.

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Journal of Water and Wastewater; Ab va Fazilab ( in persian )
Volume 25, Issue 1 - Serial Number 1
Serial number:89
March and April 2014
Pages 53-62

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