Adsorption of chrorniurn(VI) on low cost adsorbents derived from agricultural waste material: A comparative study

被引：225

作者：

Dubey, Shashi Prabha ^{[1
]}

Gopal, Krishna ^{[1
]}

机构：

[1] Ind Toxicol Res Ctr, Aquat Toxicol Div, Lucknow 226001, Uttar Pradesh, India

来源：

JOURNAL OF HAZARDOUS MATERIALS | 2007年 / 145卷 / 03期

关键词：

adsorption; groundnut husk carbon; silver; hexavalent chromium; Freundlich isotherm; ACTIVATED CARBON; HEXAVALENT CHROMIUM; AQUEOUS-SOLUTIONS; INDUSTRIAL-WASTE; CR(VI) REMOVAL; WATER; KINETICS; EQUILIBRIUM; CHITOSAN; SAWDUST;

D O I：

10.1016/j.jhazmat.2006.11.041

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

Two low cost adsorbents were prepared by using groundnut husk and were tested for the removal of chromium. All the experiments were carried out in batch process with chromium spiked samples of drinking water. Silver impregnated groundnut husk carbon and groundnut husk carbon were tested for the removal of chromium(VI). Effects of adsorbent quantity, pH, contact time and agitation rate were investigated on removal of chromium. The adsorption data were fitted well by Freundlich adsorption isotherm. Approximately, 97% of hexavalent chromium was removed at pH 3 within 5 It. It was found that adsorbents chemically modified with an oxidizing agent demonstrated better chromium removal capabilities as compared to pure adsorbents in terms of their adsorption rate. On the basis of present studies, it can be concluded that groundnut husk carbon oxidized with silver treatment, has a higher chromium adsorption capacities. (c) 2006 Elsevier B.V. All rights reserved.

引用

页码：465 / 470

页数：6

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