Vol 3 No 1 (2009)
Scientific and Technological Research Articles.

BIOSORPTION OF CHROMIUM FROM TANNERY WASTEWATERS BY CHITOSAN OBTAINED FROM EXOSKELETON SHRIMP

Published May 11, 2009
How to Cite
BIOSORPTION OF CHROMIUM FROM TANNERY WASTEWATERS BY CHITOSAN OBTAINED FROM EXOSKELETON SHRIMP. (2009). Revista Productos Naturales, 3(1), 3-11. https://doi.org/10.3407/10.3407/rpn2009v3n1.21

Abstract

Chromium in the effluent is a major concern for tanning industry. Chemical precipitation methods are commonly employed for the removal of chromium but this leads to formation of chrome-bearing solid waste. Ion exchange and membrane separation methods are relatively expensive. In this study a chitosan bioadsorbent has been employed to remove chromium from tannery effluent. The effect of pH and chromium concentration showed chitosan to exhibit uptake of about 52 mg Cr (III)/g at optimum pH of 4.0. Langmuir and Freundlich models were applied. Increase of initial concentration of Cr resulted to a decrease in adsorption efficiency.