Arsenate sorption on two Chinese red soils evaluated with macroscopic measurements and extended X-ray absorption fine-structure spectroscopy
文献类型：期刊论文
| 作者 | Luo, Lei; Zhang, Shuzhen; Shan, Xiao-Quan; Jiang, Wei; Zhu, Yong-Guan; Liu, Tao; Xie, Ya-Ning; McLaren, Ronald G. |
| 刊名 | ENVIRONMENTAL TOXICOLOGY AND CHEMISTRY
 |
| 出版日期 | 2006 |
| 卷号 | 25期号:12页码:3118-3124 |
| 关键词 | arsenate sorption extended X-ray absorption fine structure soil |
| 英文摘要 | 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. |
| WOS记录号 | WOS:000242050000005 |
| 源URL | [http://ir.rcees.ac.cn/handle/311016/22831]  |
| 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 | Luo, Lei,Zhang, Shuzhen,Shan, Xiao-Quan,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, Lei.,Zhang, Shuzhen.,Shan, Xiao-Quan.,Jiang, Wei.,Zhu, Yong-Guan.,...&McLaren, Ronald G..(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, Lei,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. |
入库方式： OAI收割
来源：生态环境研究中心
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