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	Effect of soil fulvic and humic acids on pb binding to the goethite/solution interface: ligand charge distribution modeling and speciation distribution of pb
	Xiong, Juan1; Weng, Liping2; Koopal, Luuk K.1,3; Wang, Mingxia1; Shi, Zhihua1; Zheng, Lirong4; Tan, Wenfeng1
刊名	Environmental science & technology
	2018-02-06
卷号	52期号:3页码:1348-1356
ISSN号	0013-936X
DOI	10.1021/acs.est.7b05412
通讯作者	Tan, wenfeng(wenfeng.tan@hotmail.com)
英文摘要	The effect of adsorbed soil fulvic (jgfa) and humic acid (jgha) on pb binding to goethite was studied with the ligand charge distribution (lcd) model and x-ray absorption fine structure (xafs) spectroscopy analysis. in the lcd model, the adsorbed small jgfa particles were evenly located in the stern layer, but the large jgha particles were distributed over the stern layer and the diffuse layer, which mainly depended on the jgha diameter and concentrations. specific interactions of humic substances (hs) with goethite were modeled by inner-sphere complexes between the -feoh20.5+ of goethite and the -coo- of hs and by pb bridges between surface sites and coo- groups of hs. at low pb levels, nearly 100% of pb was bound as pb bridges for both jgfa and jgha. at high pb levels and low hs loading, pb-goethite almost dominated over the entire studied ph range, but at high hs loading, the primary species was goethite-hs-pb at acidic ph and goethite-pb at alkaline ph. compared with jgfa, there was a constant contribution of pb bridges of about 10% for jgha. the linear combination fit of exafs, using pb-hs and pb-goethite as references, indicated that with increased hs loading more pb was bound to adsorbed hs and less to goethite, which supported the lcd calculations.
WOS关键词	NATURAL ORGANIC-MATTER ; METAL-ION BINDING ; WATER INTERFACE ; SURFACE COMPLEXATION ; LEAD BINDING ; IRON-OXIDES ; GOETHITE ; ADSORPTION ; SUBSTANCES ; COPPER
WOS研究方向	Engineering ; Environmental Sciences & Ecology
WOS类目	Engineering, Environmental ; Environmental Sciences
语种	英语
出版者	AMER CHEMICAL SOC
WOS记录号	WOS:000424851700047
内容类型	期刊论文
URI标识	http://www.corc.org.cn/handle/1471x/2178023
专题	高能物理研究所
通讯作者	Tan, Wenfeng
作者单位	1.Huazhong Agr Univ, Coll Resources & Environm, Wuhan 430070, Hubei, Peoples R China 2.Wageningen Univ, Dept Soil Qual, POB 8005, NL-6700 EC Wageningen, Netherlands 3.Wageningen Univ & Res, Phys Chem & Soft Matter, POB 8038, NL-6703 HB Wageningen, Netherlands 4.Chinese Acad Sci, Inst High Energy Phys, Beijing Synchrotron Radiat Facil, Beijing 100039, Peoples R China
推荐引用方式 GB/T 7714	Xiong, Juan,Weng, Liping,Koopal, Luuk K.,et al. Effect of soil fulvic and humic acids on pb binding to the goethite/solution interface: ligand charge distribution modeling and speciation distribution of pb[J]. Environmental science & technology,2018,52(3):1348-1356.
APA	Xiong, Juan.,Weng, Liping.,Koopal, Luuk K..,Wang, Mingxia.,Shi, Zhihua.,...&Tan, Wenfeng.(2018).Effect of soil fulvic and humic acids on pb binding to the goethite/solution interface: ligand charge distribution modeling and speciation distribution of pb.Environmental science & technology,52(3),1348-1356.
MLA	Xiong, Juan,et al."Effect of soil fulvic and humic acids on pb binding to the goethite/solution interface: ligand charge distribution modeling and speciation distribution of pb".Environmental science & technology 52.3(2018):1348-1356.

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