Adsorption of mercury on lignin: Combined surface complexation modeling and X-ray absorption spectroscopy studies
Lv, JT; Luo, L; 张静;Zhang, J; Christie, P; Zhang, SZ
刊名ENVIRONMENTAL POLLUTION
2012
卷号162页码:255-261
关键词Hg(II) Lignin Adsorption Surface complexation model XAS
学科分类Environmental Sciences & Ecology
DOI10.1016/j.envpol.2011.11.012
英文摘要Adsorption of mercury (Hg) on lignin was studied at a range of pH values using a combination of batch adsorption experiments, a surface complexation model (SCM) and synchrotron X-ray absorption spectroscopy (XAS). Surface complexation modeling indicates that three types of acid sites on lignin surfaces, namely aliphatic carboxylic-, aromatic carboxylic- and phenolic-type surface groups, contributed to Hg(II) adsorption. The bond distance and coordination number of Hg(II) adsorption samples at pH 3.0, 4.0 and 5.5 were obtained from extended X-ray absorption fine structure (EXAFS) spectroscopy analysis. The results of SCM and XAS combined reveal that the predominant adsorption species of Hg(II) on lignin changes from HgCl20 to monodentate complex C-O HgCl and then bidentate complex -C-O-Hg-O-C- with increasing pH value from 2.0 to 6.0. The good agreement between SCM and XAS results provides new insight into understanding the mechanisms of Hg(II) adsorption on lignin. (C) 2011 Elsevier Ltd. All rights reserved.
收录类别SCI
WOS记录号WOS:000301087800032
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被引频次:26[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.ihep.ac.cn/handle/311005/223912
专题中国科学院高能物理研究所_多学科研究中心_期刊论文
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Lv, JT,Luo, L,张静;Zhang, J,et al. Adsorption of mercury on lignin: Combined surface complexation modeling and X-ray absorption spectroscopy studies[J]. ENVIRONMENTAL POLLUTION,2012,162:255-261.
APA Lv, JT,Luo, L,张静;Zhang, J,Christie, P,&Zhang, SZ.(2012).Adsorption of mercury on lignin: Combined surface complexation modeling and X-ray absorption spectroscopy studies.ENVIRONMENTAL POLLUTION,162,255-261.
MLA Lv, JT,et al."Adsorption of mercury on lignin: Combined surface complexation modeling and X-ray absorption spectroscopy studies".ENVIRONMENTAL POLLUTION 162(2012):255-261.
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