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Arsenate sorption on two Chinese red soils evaluated with macroscopic measurements and extended X-ray absorption fine-structure spectroscopy
Luo, L; Zhang, SZ; Shan, XQ; Jiang, W; Zhu, YG; Liu, T; Xie, YN; McLaren, RG; Liu T(刘涛); Xie YN(谢亚宁)
2006
发表期刊ENVIRONMENTAL TOXICOLOGY AND CHEMISTRY
卷号25期号:12页码:3118-3124
通讯作者Chinese Acad Sci, Ecoenvironm Sci Res Ctr, State Key Lab Environm Chem & Ecotoxicol, Beijing 100085, Peoples R China ; Chinese Acad Sci, Inst High Energy Phys, State Key Lab Synchtron Radiat, Beijing 100039, Peoples R China ; Lincoln Univ, Agr & Life Sci Div, Canterbury, New Zealand
文章类型Article
摘要Arsenic sorption is the primary factor that affects the bioavailability and mobility of arsenic in soils. To elucidate the characteristics and mechanisms of arsenate, As(V), sorption on soils, a combination of sorption isotherms, zeta potential measurements, and extended X-ray absorption fine-structure (EXAFS) spectroscopy was used to investigate As(V) sorption on two Chinese red soils. Arsenate sorption increased with increasing As(V) concentration and was insensitive to ionic strength changes at pH 6.0. Arsenate, mainly as H2AsO4- in soil solution at pH 6.0, was strongly sorbed mainly through ligand exchange by the two soils. The sorption capacity was affected by the iron and aluminum mineral contents in the soils. The zeta potential measurements showed that As(V) sorption lowered the zeta potential and the points of zero charge of the soils. The EXAFS data indicate that adsorbed As(V) forms inner-sphere complexes with bidentate-binuclear configurations, as evidenced by an As-Fe bond distance of 3.28 +/- 0.04 angstrom and an As-Al bond distance of 3.17 +/- 0.03 angstrom. The two As(V) complexes were stable at different As(V) loadings, whereas the proportions were related to the aluminum and iron mineral contents in the soils. This study illuminated the importance of inclusion of microscopic and macroscopic experiments to elucidate sorption behavior and mechanisms.
关键词arsenate sorption extended X-ray absorption fine structure soil
学科领域Environmental Sciences & Ecology; Toxicology
研究领域[WOS]Environmental Sciences & Ecology ; Toxicology ; Environmental Sciences & Ecology ; Toxicology
DOI10.1897/06-184R.1
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语种英语
研究领域[WOS]Environmental Sciences & Ecology ; Toxicology ; Environmental Sciences & Ecology ; Toxicology
WOS类目Environmental Sciences ; Toxicology
WOS记录号WOS:000242050000005
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被引频次:14[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/311005/239871
专题多学科研究中心
作者单位中国科学院高能物理研究所
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Luo, L,Zhang, SZ,Shan, XQ,et al. Arsenate sorption on two Chinese red soils evaluated with macroscopic measurements and extended X-ray absorption fine-structure spectroscopy[J]. ENVIRONMENTAL TOXICOLOGY AND CHEMISTRY,2006,25(12):3118-3124.
APA Luo, L.,Zhang, SZ.,Shan, XQ.,Jiang, W.,Zhu, YG.,...&谢亚宁.(2006).Arsenate sorption on two Chinese red soils evaluated with macroscopic measurements and extended X-ray absorption fine-structure spectroscopy.ENVIRONMENTAL TOXICOLOGY AND CHEMISTRY,25(12),3118-3124.
MLA Luo, L,et al."Arsenate sorption on two Chinese red soils evaluated with macroscopic measurements and extended X-ray absorption fine-structure spectroscopy".ENVIRONMENTAL TOXICOLOGY AND CHEMISTRY 25.12(2006):3118-3124.
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