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Distinct effect of humic acid on ferrihydrite colloid-facilitated transport of arsenic in saturated media at different pH
Ma, Jie1,2,3,4,5; Guo, Huaming3,4,5; Weng, Liping2; Li, Yongtao1,2; Lei, Mei6; Chen, Yali2
2018-12-01
Source PublicationCHEMOSPHERE
ISSN0045-6535
Volume212Pages:794-801
Corresponding AuthorGuo, Huaming(hmguo@cugb.edu.cn)
AbstractBoth humic acid and arsenic (As) have a strong affinity to ferrihydrite colloids (FHc). However, little is known about effects of humic acid colloid (HAc) and FHc interaction on transport and deposition of As in porous media. Co-transport of HAc-FHc and As at different pH was systematically investigated by monitoring their breakthrough curves (BTCs) in saturated sand columns. Colloid and solute transport models were used to reveal mechanisms of As transport with HAc-FHc in porous media. Results showed that HAc-FHc regulated As transport. Under neutral pH conditions, As transport was facilitated by FHc loading small chain-shaped HAc, while it was slightly retarded by FHc loading granular HAc. Under alkaline conditions, HAc was chain-shaped and coupled with FHc to facilitate As transport. However, mobile colloid-adsorbed As was less evident due to relatively low adsorption on FHc under alkaline pH in comparison with the transport under neutral pH. The presence of HAc occupied adsorption sites on FHc and thus decreased As adsorption. Arsenic adsorption on mobile FHc decreased with increasing HAc concentration. Therefore, HAc had an antagonistic effect on mixed colloid-facilitated As transport at neutral and alkaline conditions. Arsenic was readily co-deposited with FHc, especially at low pH. This study suggested that morphology and concentration of HAc, mobility of FHc, and solution pH would control As transport in porous media. The fate of As changed from co-transport with HAc-FHc to co-deposition when environmental pH decreased. (C) 2018 Elsevier Ltd. All rights reserved.
KeywordArsenic Transport Deposition Inorganic colloid Organic colloid
DOI10.1016/j.chemosphere.2018.08.131
WOS KeywordNATURAL ORGANIC-MATTER ; POROUS-MEDIA ; SAND COLUMNS ; HYDROXYAPATITE NANOPARTICLES ; AGGREGATION KINETICS ; IONIC-STRENGTH ; PARTICLE-SIZE ; QUARTZ SAND ; FLOW-RATE ; ADSORPTION
Indexed BySCI
Language英语
Funding ProjectNational Key Research and Development Program of China[2016YFD0800304] ; National Natural Science Foundation of China[41701262] ; National Natural Science Foundation of China[U1401234] ; National Natural Science Foundation of China[41222020] ; National Natural Science Foundation of China[41172224] ; China Postdoctoral Science Foundation[2017M610532] ; Fundamental Research Funds for the Central Universities[2652013028] ; Fok Ying-Tung Education Foundation, China[131017]
Funding OrganizationNational Key Research and Development Program of China ; National Natural Science Foundation of China ; China Postdoctoral Science Foundation ; Fundamental Research Funds for the Central Universities ; Fok Ying-Tung Education Foundation, China
WOS Research AreaEnvironmental Sciences & Ecology
WOS SubjectEnvironmental Sciences
WOS IDWOS:000447478100086
PublisherPERGAMON-ELSEVIER SCIENCE LTD
Citation statistics
Cited Times:5[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.igsnrr.ac.cn/handle/311030/52684
Collection中国科学院地理科学与资源研究所
Corresponding AuthorGuo, Huaming
Affiliation1.South China Agr Univ, Coll Nat Resources & Environm, Guangzhou 510642, Guangdong, Peoples R China
2.Minist Agr, Agroenvironm Protect Inst, Tianjin 300191, Peoples R China
3.China Univ Geosci, State Key Lab Biogeol & Environm Geol, Beijing 100083, Peoples R China
4.China Univ Geosci Beijing, MOE Key Lab Groundwater Circulat & Environm Evolu, Beijing 100083, Peoples R China
5.China Univ Geosci Beijing, Sch Water Resources & Environm, Beijing 100083, Peoples R China
6.Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, Beijing 100101, Peoples R China
Recommended Citation
GB/T 7714
Ma, Jie,Guo, Huaming,Weng, Liping,et al. Distinct effect of humic acid on ferrihydrite colloid-facilitated transport of arsenic in saturated media at different pH[J]. CHEMOSPHERE,2018,212:794-801.
APA Ma, Jie,Guo, Huaming,Weng, Liping,Li, Yongtao,Lei, Mei,&Chen, Yali.(2018).Distinct effect of humic acid on ferrihydrite colloid-facilitated transport of arsenic in saturated media at different pH.CHEMOSPHERE,212,794-801.
MLA Ma, Jie,et al."Distinct effect of humic acid on ferrihydrite colloid-facilitated transport of arsenic in saturated media at different pH".CHEMOSPHERE 212(2018):794-801.
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