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Influence of calcium and phosphate on pH dependency of arsenite and arsenate adsorption to goethite
Deng, Yingxuan1; Li, Yongtao1,2; Li, Xiaojing1; Sun, Yang1; Ma, Jie1,2; Lei, Mei3; Weng, Liping1,4
2018-05-01
Source PublicationCHEMOSPHERE
ISSN0045-6535
Volume199Pages:617-624
Corresponding AuthorWeng, Liping(liping.weng@wur.nl)
AbstractIn 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.
KeywordArsenic Adsorption Multi-component Modeling CD-MUSIC
DOI10.1016/j.chemosphere.2018.02.018
WOS KeywordCOMPETITIVE ADSORPTION ; WATER INTERFACE ; CHARGE-DISTRIBUTION ; ION ADSORPTION ; CONTAMINATED SOILS ; FULVIC-ACID ; FERRIHYDRITE ; ENVIRONMENT ; OXIDATION ; MOBILITY
Indexed BySCI
Language英语
Funding ProjectNational 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]
Funding OrganizationNational Key Research and Development Program of China ; National Natural Science Foundation of China ; Postdoctoral Science Foundation of China
WOS Research AreaEnvironmental Sciences & Ecology
WOS SubjectEnvironmental Sciences
WOS IDWOS:000428973200071
PublisherPERGAMON-ELSEVIER SCIENCE LTD
Citation statistics
Cited Times:6[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.igsnrr.ac.cn/handle/311030/57263
Collection中国科学院地理科学与资源研究所
Corresponding AuthorWeng, Liping
Affiliation1.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
Recommended Citation
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.
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