兰州大学机构库 >核科学与技术学院
Colloidal stability and correlated migration of illite in the aquatic environment: The roles of pH, temperature, multiple cations and humic acid
Wei, Xiaoyan1; Pan, DQ(潘多强)1; Xu, Zhen1; Xian, Dongfan2; Li, Xiaolong3; Tan, Zhaoyi3; Liu, Chunli2; Wu, WS(吴王锁)1
2021-05-10
Source PublicationSCIENCE OF THE TOTAL ENVIRONMENT
ISSN0048-9697
Volume768
AbstractThe mobility and environmental risk of colloids and associated pollutants are dependent on their dispersion stability under various conditions. In this work, the stability and correlated migration of illite colloids (IC) were systematically investigated over a wide range of aquatic chemistry conditions. The results showed that IC was aggregation favorable at low pH, low temperature and high ionic strength. The critical coagulation concentration (CCC) of IC increased exponentially with increasing values of r/Z(3), following the Schulze-Hardy and Hofmeister series. Humic acid (HA) greatly mitigated colloid aggregation since the attachment of HA on IC surface increased the steric hindrance and electrostatic potential, and the enhancement of stability was linearly correlated with the HA concentration. The Derjaguin-Landau-Verwey-Overbeek (DLVO) model revealed that the interaction force deriving from van der Waals forces and electrostatic double-layer energy evolved as the aquatic chemistry varied, and the reduction in repulsion force between particles facilitated the colloid collision and then aggregation. The migration of IC in the porous sand column was highly correlated with the dispersion stability and filtration effect, the agglomerated colloids were redispersed and released when conditions favored dispersion. The illite colloids acted as efficient carriers for Eu(III) transport. These findings are essential for improving the understanding of the geological fate of environmental colloids and associated radionuclides. (C) 2020 Elsevier B.V. All rights reserved.
KeywordIllite Colloids Stability Migration Environment
PublisherELSEVIER
DOI10.1016/j.scitotenv.2020.144174
Indexed ByEI ; SCOPUS ; SCIE
Language英语
WOS Research AreaEnvironmental Sciences & Ecology
WOS SubjectEnvironmental Sciences
WOS IDWOS:000625384700003
Citation statistics
Cited Times:3[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.lzu.edu.cn/handle/262010/449236
Collection核科学与技术学院
Corresponding AuthorPan, Duoqiang
Affiliation1.Lanzhou Univ, Sch Nucl Sci & Technol, Radiochem Lab, Lanzhou 730000, Peoples R China;
2.Peking Univ, Fundamental Sci Lab Radiochem & Radiat Chem, Beijing Natl Lab Mol Sci, Coll Chem & Mol Engn, Beijing 100871, Peoples R China;
3.China Acad Engn Phys, Inst Nucl Phys & Chem, Mianyang 621900, Sichuan, Peoples R China
First Author AffilicationSchool of Nuclear Science and Technology
Corresponding Author AffilicationSchool of Nuclear Science and Technology
Recommended Citation
GB/T 7714
Wei, Xiaoyan,Pan, Duoqiang,Xu, Zhen,et al. Colloidal stability and correlated migration of illite in the aquatic environment: The roles of pH, temperature, multiple cations and humic acid[J]. SCIENCE OF THE TOTAL ENVIRONMENT,2021,768.
APA Wei, Xiaoyan.,Pan, Duoqiang.,Xu, Zhen.,Xian, Dongfan.,Li, Xiaolong.,...&Wu, Wangsuo.(2021).Colloidal stability and correlated migration of illite in the aquatic environment: The roles of pH, temperature, multiple cations and humic acid.SCIENCE OF THE TOTAL ENVIRONMENT,768.
MLA Wei, Xiaoyan,et al."Colloidal stability and correlated migration of illite in the aquatic environment: The roles of pH, temperature, multiple cations and humic acid".SCIENCE OF THE TOTAL ENVIRONMENT 768(2021).
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