Adsorption of mercury on lignin: Combined surface complexation modeling and X-ray absorption spectroscopy studies

CORC > 生态环境研究中心 > 中国科学院生态环境研究中心 > 环境化学与生态毒理学国家重点实验室

	Adsorption of mercury on lignin: Combined surface complexation modeling and X-ray absorption spectroscopy studies
	Lv, Jitao ; Luo, Lei ; Zhang, Jing ; Christie, Peter ; Zhang, Shuzhen
刊名	ENVIRONMENTAL POLLUTION
	2012
卷号	162 页码:255－261
关键词	Hg(II) Lignin Adsorption Surface complexation model XAS
ISSN号	0269-7491
中文摘要	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.
WOS记录号	WOS:000301087800032
公开日期	2014-11-04
内容类型	期刊论文
源URL	[http://ir.rcees.ac.cn/handle/311016/7770]
专题	生态环境研究中心_环境化学与生态毒理学国家重点实验室
推荐引用方式 GB/T 7714	Lv, Jitao,Luo, Lei,Zhang, Jing,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, Jitao,Luo, Lei,Zhang, Jing,Christie, Peter,&Zhang, Shuzhen.(2012).Adsorption of mercury on lignin: Combined surface complexation modeling and X-ray absorption spectroscopy studies.ENVIRONMENTAL POLLUTION,162,255－261.
MLA	Lv, Jitao,et al."Adsorption of mercury on lignin: Combined surface complexation modeling and X-ray absorption spectroscopy studies".ENVIRONMENTAL POLLUTION 162(2012):255－261.