Influence of calcium and phosphate on pH dependency of arsenite and arsenate adsorption to goethite
文献类型：期刊论文
| 作者 | Deng, Yingxuan1; Li, Yongtao1,2; Li, Xiaojing1; Sun, Yang1; Ma, Jie1,2; Lei, Mei3 ; Weng, Liping1,4
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| 刊名 | CHEMOSPHERE
 |
| 出版日期 | 2018-05-01 |
| 卷号 | 199页码:617-624 |
| 关键词 | Arsenic Adsorption Multi-component Modeling CD-MUSIC |
| ISSN号 | 0045-6535 |
| DOI | 10.1016/j.chemosphere.2018.02.018 |
| 通讯作者 | Weng, Liping(liping.weng@wur.nl) |
| 英文摘要 | In the environment, simultaneous presence of arsenic (As) of different oxidation states is common, which hampers our understanding of As behavior. In the current study, the pH dependency of arsenite (As(III)) and arsenate (As(V)) adsorption to goethite under the influence of calcium (Ca2+) (as a major cation) and phosphate (PO43-) (as a major anion) was studied, and the reliability of the CD-MUSIC model prediction was tested. The results show that the presence of the major ions led in general to a weaker and more complicated pH dependency of As adsorption. Calcium promoted As(V) adsorption especially at high pH, which can reverse the direction of the pH dependency. The presence of Ca2+ can even decrease As(III) adsorption when As(V) and/or PO43- are present. Phosphate competed strongly with both As(III) and As(V) in their adsorption, especially at intermediate and low pH. In the multi-component system, As(III) adsorbs weaker than As(V) over the environmental relevant pH range, therefore it is often the dominant As species in solution and soluble As(III) concentration generally decreases with increasing pH. In the same pH range, As(V) adsorption shows a complicated pH dependency. Soluble As(V) reaches a minimum around pH 6 at high concentration of major bivalent cations (e.g. Ca2+), whereas soluble As(V) will decrease with pH at low bivalent cation concentrations. The experimental results can be reliably predicted and explained with the CD-MUSIC model. The outcome of this study can provide understanding needed in the risk assessment and remediation of As contaminated soils and water. (C) 2018 Elsevier Ltd. All rights reserved. |
| WOS关键词 | COMPETITIVE ADSORPTION ; WATER INTERFACE ; CHARGE-DISTRIBUTION ; ION ADSORPTION ; CONTAMINATED SOILS ; FULVIC-ACID ; FERRIHYDRITE ; ENVIRONMENT ; OXIDATION ; MOBILITY |
| 资助项目 | National Key Research and Development Program of China[2016YFD0800304] ; National Natural Science Foundation of China[U1401234] ; National Natural Science Foundation of China[41771277] ; National Natural Science Foundation of China[41701262] ; Postdoctoral Science Foundation of China[2017M610532] |
| WOS研究方向 | Environmental Sciences & Ecology |
| 语种 | 英语 |
| WOS记录号 | WOS:000428973200071 |
| 出版者 | PERGAMON-ELSEVIER SCIENCE LTD |
| 资助机构 | National Key Research and Development Program of China ; National Natural Science Foundation of China ; Postdoctoral Science Foundation of China |
| 源URL | [http://ir.igsnrr.ac.cn/handle/311030/57262]  |
| 专题 | 中国科学院地理科学与资源研究所 |
| 通讯作者 | Weng, Liping |
| 作者单位 | 1.Minist Agr, Agroenvironm Protect Inst, Tianjin 300191, Peoples R China 2.South China Agr Univ, Coll Nat Resources & Environm, Guangzhou 510642, Guangdong, Peoples R China 3.Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, Beijing 100101, Peoples R China 4.Wageningen Univ, Dept Soil Qual, POB 47, NL-6700 AA Wageningen, Netherlands |
| 推荐引用方式 GB/T 7714 | Deng, Yingxuan,Li, Yongtao,Li, Xiaojing,et al. Influence of calcium and phosphate on pH dependency of arsenite and arsenate adsorption to goethite[J]. CHEMOSPHERE,2018,199:617-624. |
| APA | Deng, Yingxuan.,Li, Yongtao.,Li, Xiaojing.,Sun, Yang.,Ma, Jie.,...&Weng, Liping.(2018).Influence of calcium and phosphate on pH dependency of arsenite and arsenate adsorption to goethite.CHEMOSPHERE,199,617-624. |
| MLA | Deng, Yingxuan,et al."Influence of calcium and phosphate on pH dependency of arsenite and arsenate adsorption to goethite".CHEMOSPHERE 199(2018):617-624. |
入库方式： OAI收割
来源：地理科学与资源研究所
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