Study on Removal of Cr(VI) from Aqueous Solution by Cross-Linked Chitosan

Abstract

Abstract:In this paper, the adsorbent for the removal of hexavalent Cr (Chromium) from aqueous solutions has been prepared by modifying chitosan composite with EP (Epichlorohydrin) or GA (Glutaraldehyde). The modified cross-linked chitosan was characterized by SEM (Scanning Electron Microscopy) and FT-IR (Fourier Transform Infrared Spectroscopy). Batch adsorption experiments were carried out to evaluate the adsorption of Cr(VI) by the cross-linked chitosan under different conditions. Furthermore, the sorption mechanism of Cr(VI) by the cross-linked chitosan was investigated by applying Langmuir and Freundlich isotherm equations to the data obtained. The concentration of Cr in solution was determined by ICP-MS (Inductively Coupled Plasma Mass Spectrometry). The cross-linked chitosan can be an efficient sorbent for Cr(VI).