Adsorption of uranium (VI) from aqueous solution onto cross-linked chitosan

被引：323

作者：

Wang, Guanghui ^{[1
]}

Liu, Jinsheng ^{[1
]}

Wang, Xuegang ^{[1
]}

Xie, Zhiying ^{[1
]}

Deng, Nansheng ^{[2
]}

机构：

[1] E China Inst Technol, Dept Civil & Environm Engn, Fuzhou 344000, Jiangxi, Peoples R China

[2] Wuhan Univ, Sch Resources & Environm Sci, Wuhan 430079, Peoples R China

来源：

JOURNAL OF HAZARDOUS MATERIALS | 2009年 / 168卷 / 2-3期

关键词：

Uranium (VI); Cross-linked chitosan; Adsorption; Isotherm; Kinetics; ACTIVATED CARBON; SELECTIVE ADSORPTION; CONTAMINATED WATER; REACTIVE DYE; REMOVAL; EQUILIBRIUM; BEADS; ADSORBENTS; CHARCOAL; SORPTION;

D O I：

10.1016/j.jhazmat.2009.02.157

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

Cross-linked chitosan (CCTS) was synthesized by the reaction of chitosan with epichlorohydrin under alkaline conditions. Adsorption of uranium (VI) from aqueous solution onto cross-linked chitosan was investigated in a batch system. Adsorption isotherm and adsorption kinetic studies of uranium (VI) onto cross-linked chitosan were carried out. The influence factors on uranium (VI) adsorption were also investigated and described in detail, such as contact time, pH value and initial uranium (I) concentration. Langmuir and Freundlich adsorption models were used for the mathematical description of the adsorption equilibrium. Equilibrium data agreed very well with the Langmuir model. Adsorption kinetics data were tested using pseudo-first-order and pseudo-second-order models. Kinetic studies showed that the adsorption followed a pseudo-second-order kinetic model, indicating that the chemical adsorption was the rate-limiting step. Results also showed that cross-linked chitosan was favourable adsorbent. (C) 2009 Elsevier B.V. All rights reserved

引用

页码：1053 / 1058

页数：6

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