Dynamic adsorption of chromium ions onto natural and crosslinked chitosan membranes for wastewater treatment

Materials Research

Emerson Meneghetti¹  Paula Baroni¹  Rodrigo Silveira Vieira¹  Meuris Gurgel Carlos Da Silva¹  Marisa Masumi Beppu¹ 

[1] ,State University of Campinas School of Chemical Engineering Campinas SP ,Brazil

关键词: chitosan;    heavy metal;    chromium;    adsorption;   

DOI  :  10.1590/S1516-14392010000100018

来源: SciELO

【 摘 要 】

Water pollution with heavy metals is a matter of major concern for public health and also for natural resource management. The present study investigated the effect of chemical modifications on biopolymeric adsorbents (based on chitosan membranes) for chromium removal using fixed-bed dynamic adsorption technique. Parameters such as flow rate, initial concentration and crosslinking agents were evaluated, from a practical point-of-view, in order to optimize the adsorption capacity of natural, glutaraldehyde and epichlorohydrin crosslinked chitosan membranes. The adsorption capacity of natural and epiclorohydrin-crosslinked chitosan membranes were very close to each other; however, glutaraldehyde-crosslinked chitosan membranes presented nearly twice the adsorption capacity compared to the other membranes, being the most promising adsorbent in such mass-transfer systems.

【 授权许可】

CC BY   
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