Synthesis and evaluation of a thiourea-modified chitosan derivative applied for adsorption of Hg(II) from synthetic wastewater

被引：48
作者：
Wang, Lin [1 ,2 ]
Xing, Ronge [1 ]
Liu, Song [1 ]
Cai, Shengbao [1 ,2 ]
Yu, Huahua [1 ]
Feng, Jinhua [1 ,2 ]
Li, Rongfeng [1 ,2 ]
Li, Pengcheng [1 ]
机构：
[1] Chinese Acad Sci, Inst Oceanol, Qingdao 266071, Peoples R China
[2] Chinese Acad Sci, Grad Sch, Beijing 100039, Peoples R China
来源：
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES | 2010年 / 46卷 / 05期
基金：
国家高技术研究发展计划(863计划);
关键词：
Adsorption; Mercury; Thiourea; Chitosan; AQUEOUS-SOLUTIONS; CHELATING RESIN; MERCURY(II); SORPTION; EXTRACTION; REMOVAL; GLUTARALDEHYDE; EQUILIBRIUM; PALLADIUM(II); DESORPTION;
D O I：
10.1016/j.ijbiomac.2010.03.003
中图分类号：
Q5 [生物化学]; Q7 [分子生物学];
学科分类号：
071010 ; 081704 ;
摘要：
In this work, a thiourea-modified chitosan derivative (TMCD) was synthesized through two steps, O-carboxymethylated first and then modified by a polymeric Schiff's base of thiourea/glutaraldehyde. The adsorption behavior of mercury (II) ions onto TMCD was investigated through batch method. The maximum adsorption capacity for Hg(II) was found to be 6.29 mmol/g at pH 5.0 and both kinetic and thermodynamic parameters of the adsorption process were obtained. The results indicated that adsorption process was spontaneous exothermic reaction and kinetically followed pseudo-second-order model. The adsorption experiments also demonstrated TMCD had high adsorption selectivity towards Hg(II) ions when coexisted with Cu(II), Zn(II), Cd(II) and Ca(II) in solution and it could be easily regenerated and efficiently reused. (C) 2010 Elsevier B.V. All rights reserved.
引用
收藏
页码：524 / 528
页数：5
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