Distinct effect of humic acid on ferrihydrite colloid-facilitated transport of arsenic in saturated media at different pH

doi:10.1016/j.chemosphere.2018.08.131

	Distinct effect of humic acid on ferrihydrite colloid-facilitated transport of arsenic in saturated media at different pH
	Ma, Jie 1,2,3,4,5; Guo, Huaming 3,4,5; Weng, Liping 2; Li, Yongtao 1,2; Lei, Mei 6; Chen, Yali 2
刊名	CHEMOSPHERE
	2018-12-01
卷号	212 页码:794-801
关键词	Arsenic Transport Deposition Inorganic colloid Organic colloid
ISSN号	0045-6535
DOI	10.1016/j.chemosphere.2018.08.131
通讯作者	Guo, Huaming(hmguo@cugb.edu.cn)
英文摘要	Both 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.
资助项目	National 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]
WOS关键词	NATURAL ORGANIC-MATTER ; POROUS-MEDIA ; SAND COLUMNS ; HYDROXYAPATITE NANOPARTICLES ; AGGREGATION KINETICS ; IONIC-STRENGTH ; PARTICLE-SIZE ; QUARTZ SAND ; FLOW-RATE ; ADSORPTION
WOS研究方向	Environmental Sciences & Ecology
语种	英语
出版者	PERGAMON-ELSEVIER SCIENCE LTD
WOS记录号	WOS:000447478100086
资助机构	National 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
内容类型	期刊论文
源URL	[http://ir.igsnrr.ac.cn/handle/311030/52683]
专题	中国科学院地理科学与资源研究所
通讯作者	Guo, Huaming
作者单位	1.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
推荐引用方式 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.