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Selective removal of mercury ions using a chitosan-poly(vinyl alcohol) hydrogel adsorbent with three-dimensional network structure
Wang, Xiaohuan; Deng, Wenye; Xie, Yuyu; Wang, Chuanyi; Wang, XH
2013
发表期刊Chemical Engineering Journal
ISSN13858947
卷号228期号:7页码:232-242
摘要The chitosan-poly(vinyl alcohol) (CTS-PVA) hydrogel with three-dimensional network structure was developed via a glutaraldehyde cross-linking method in combination with an alternate freeze-thawed process. The formation of the three-dimensional network structure was confirmed by SEM and parallel FT-IR measurements. According to the analysis of parallel FT-IR measurements and MM+ molecular mechanics theoretical simulation, the three-dimensional network architecture is built mainly by inter- and intra-molecular hydrogen bonds as well as C=N bonds formed by the reaction of -NH2 groups of CTS and -CHO groups of glutaraldehyde. Parallel adsorption experiments and comparative studies showed that the hydrogel adsorbent has superior adsorption capacity and selectivity for Hg(II) ions. Its adsorption capacity for Hg(II) ions reaches 585.90 mg/g. Its selectivity coefficient of the hydrogel for Hg(II) ions is 487.7, 36642.5, 284298.5 times higher than that for Cu(II) ions, Pb(II) ions, and Cd(II) ions, respectively. Its selective adsorption mechanism for Hg(II) ions was proposed based on FT-IR and XPS spectral analysis before and after Hg(II) adsorption. All nitrogen-containing functional groups are involved in Hg(II) adsorption, especially, -NHCOCH3 and C=N groups are the main selective functional groups responsible for Hg(II) adsorption. The existing form of the adsorbed Hg(II) may be in mercury acetate.
关键词Three-dimensional Network Hg(Ii) Adsorption Selectivity Mechanism Chitosan
DOI10.1016/j.cej.2013.04.104
收录类别SCI
WOS记录号WOS:000326203500026
引用统计
被引频次:44[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.xjipc.cas.cn/handle/365002/3879
专题环境科学与技术研究室
通讯作者Wang, XH
作者单位Chinese Acad Sci, Xinjiang Tech Inst Phys & Chem, LEST, Urumqi 830011, Xinjiang, Peoples R China;Chinese Acad Sci, Xinjiang Tech Inst Phys & Chem, Anal & Testing Ctr, Urumqi 830011, Xinjiang, Peoples R China
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GB/T 7714
Wang, Xiaohuan,Deng, Wenye,Xie, Yuyu,et al. Selective removal of mercury ions using a chitosan-poly(vinyl alcohol) hydrogel adsorbent with three-dimensional network structure[J]. Chemical Engineering Journal,2013,228(7):232-242.
APA Wang, Xiaohuan,Deng, Wenye,Xie, Yuyu,Wang, Chuanyi,&Wang, XH.(2013).Selective removal of mercury ions using a chitosan-poly(vinyl alcohol) hydrogel adsorbent with three-dimensional network structure.Chemical Engineering Journal,228(7),232-242.
MLA Wang, Xiaohuan,et al."Selective removal of mercury ions using a chitosan-poly(vinyl alcohol) hydrogel adsorbent with three-dimensional network structure".Chemical Engineering Journal 228.7(2013):232-242.
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