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Enhanced transport of ferrihydrite colloid by chain-shaped humic acid colloid in saturated porous media
Ma, Jie1,2,3,4,5; Guo, Huaming1,2; Lei, Mei3; Li, Yongtao4,5; Weng, Liping5; Chen, Yali5; Ma, Yuling5; Deng, Yingxuan5; Feng, Xiaojuan3; Xiu, Wei1,2
2018-04-15
Source PublicationSCIENCE OF THE TOTAL ENVIRONMENT
ISSN0048-9697
Volume621Pages:1581-1590
Corresponding AuthorGuo, Huaming(hmguo@cugb.edu.cn)
AbstractBoth humic acid and colloid particle size effectively regulate colloid transport. However, little is known about effect of particle size and configuration of humic acid colloid (HA(colloid)) on enhanced-transport of ferrihydrite colloid (FHcolloid) in porous media. Co-transport of HA(colloid) and FHcolloid at different pH was systematically investigated by monitoring breakthrough curves (BTCs) in saturated sand columns. The colloid transport model and the (X)DLVO theory were used to reveal the mechanism of HA(colloid)-enhanced FHcolloid transport in the columns. Results showed that HA(colloid) enhanced FHcolloid transport in neutral and alkaline conditions. In neutral conditions, small HA(colloid) (F-HA(colloid)) with chain-shaped structure enhanced FHcolloid transport more prominently than pristine granular HA(colloid). The chain-shaped F-HA(colloid) caused osmotic repulsion and elastic-steric repulsion between colloids and sand, leading to enhanced transport. However, the granular HA(colloid) readily occurred as deposition due to attachment and straining, which decreased the enhanced transport of FHcolloid. In alkaline conditions, both HA(colloid) and F-HA(colloid) were chain-shaped, with longer chains of HA(colloid) than F-HA(colloid). Ferrihydrite colloid transport was enhanced by HA(colloid) more significantly than F-HA(colloid) due to stronger repulsion between mixed HA(colloid)-FHcolloid and sand. It suggested that regulation of particle size and morphology of HA(colloid) would enhance FHcolloid transport and further help in understanding FHcolloid-facilitated contaminants transport in porous media. (C) 2017 Elsevier B.V. All rights reserved.
KeywordFerrihydrite colloid Humic acid colloid Morphology XDLVO Transport
DOI10.1016/j.scitotenv.2017.10.070
WOS KeywordOXIDE NANOPARTICLES ; IONIC-STRENGTH ; SAND COLUMNS ; QUARTZ SAND ; FLOW-RATE ; GRAPHENE OXIDE ; ORGANIC-MATTER ; PARTICLE-SIZE ; DEPOSITION ; WATER
Indexed BySCI
Language英语
Funding ProjectNational Key Research and Development Program of China[2016YFD0800304] ; National Natural Science Foundation of China[41222020] ; National Natural Science Foundation of China[41172224] ; National Natural Science Foundation of China[U1401234] ; 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:000424196800155
PublisherELSEVIER SCIENCE BV
Citation statistics
Document Type期刊论文
Identifierhttp://ir.igsnrr.ac.cn/handle/311030/57131
Collection中国科学院地理科学与资源研究所
Corresponding AuthorGuo, Huaming
Affiliation1.China Univ Geosci, State Key Lab Biogeol & Environm Geol, Beijing 100083, Peoples R China
2.China Univ Geosci, Sch Water Resources & Environm, Beijing 100083, Peoples R China
3.Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, Beijing 100101, Peoples R China
4.South China Agr Univ, Coll Nat Resources & Environm, Guangzhou 510642, Guangdong, Peoples R China
5.Minist Agr, Agroenvironm Protect Inst, Tianjin 300191, Peoples R China
Recommended Citation
GB/T 7714
Ma, Jie,Guo, Huaming,Lei, Mei,et al. Enhanced transport of ferrihydrite colloid by chain-shaped humic acid colloid in saturated porous media[J]. SCIENCE OF THE TOTAL ENVIRONMENT,2018,621:1581-1590.
APA Ma, Jie.,Guo, Huaming.,Lei, Mei.,Li, Yongtao.,Weng, Liping.,...&Xiu, Wei.(2018).Enhanced transport of ferrihydrite colloid by chain-shaped humic acid colloid in saturated porous media.SCIENCE OF THE TOTAL ENVIRONMENT,621,1581-1590.
MLA Ma, Jie,et al."Enhanced transport of ferrihydrite colloid by chain-shaped humic acid colloid in saturated porous media".SCIENCE OF THE TOTAL ENVIRONMENT 621(2018):1581-1590.
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