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Microstructure and morphological characterization of lead-contaminated clay with nanoscale zero-valent iron (nZVI) treatment
Yong-Zhan Chen1; Wan-Huan Zhou1; Fuming Liu1,2,3; Shuping Yi2; Xueyu Geng4
2019-05-03
Source PublicationEngineering Geology
ISSN0013-7952
Volume256Pages:84-92
Abstract

The increasing use of nanoscale zero-valent iron (nZVI) for soil and groundwater remediation has raised concerns about its potential effect on soil properties. Numerous laboratory and field studies have demonstrated its excellent capability to immobilize contaminants and enhance contaminated soil. However, a few studies have shed light on the changes in the microstructure and morphology of the soil due to nZVI treatment. This study explores the variation in particle morphology and microstructure in nZVI-treated soil. A series of microscale experiments, including field emission scanning electron microscopy (FESEM), particle size analysis, mercury injection porosimetry (MIP), optical microscopic analysis, and particle shape tests, were conducted on nZVI-treated samples. The dosages of nZVI used were 0%, 0.2%, 1%, 5%, and 10% of the contaminated soil. Morphological characterization suggested that the addition of nZVI resulted in the occurrence of larger-sized particles, on-particle branched structures, finer pore size distribution, aggregation, and a flocculent network in the soil structure. The aggregated and bonded soil particles via nZVI could be one of the mechanisms for its variation in geotechnical characteristics. The findings of this study may improve our understanding of soil improvement using nZVI treatment.

KeywordNanoscale Zero-valent Iron Clay Microstructure Aggregation Morphology
DOI10.1016/j.enggeo.2019.05.001
URLView the original
Indexed BySCIE
Language英語English
WOS Research AreaEngineering ; Geology
WOS SubjectEngineering, Geological ; Geosciences, Multidisciplinary
WOS IDWOS:000472690300006
PublisherELSEVIER, RADARWEG 29, 1043 NX AMSTERDAM, NETHERLANDS
Scopus ID2-s2.0-85065623516
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Cited Times [WOS]:12   [WOS Record]     [Related Records in WOS]
Document TypeJournal article
CollectionUniversity of Macau
Corresponding AuthorWan-Huan Zhou
Affiliation1.State Key Laboratory of Internet of Things for Smart City and Department of Civil and Environmental Engineering,University of Macau,Macau S.A.R.,China
2.School of Environmental Science and Engineering,Southern University of Science and Technology,Shenzhen,China
3.Guangdong Provincial Key Laboratory of Soil and Groundwater Pollution Control,Shenzhen,China
4.School of Engineering,University of Warwick,Coventry,CV4 7AL,United Kingdom
First Author AffilicationUniversity of Macau
Corresponding Author AffilicationUniversity of Macau
Recommended Citation
GB/T 7714
Yong-Zhan Chen,Wan-Huan Zhou,Fuming Liu,et al. Microstructure and morphological characterization of lead-contaminated clay with nanoscale zero-valent iron (nZVI) treatment[J]. Engineering Geology,2019,256:84-92.
APA Yong-Zhan Chen,Wan-Huan Zhou,Fuming Liu,Shuping Yi,&Xueyu Geng.(2019).Microstructure and morphological characterization of lead-contaminated clay with nanoscale zero-valent iron (nZVI) treatment.Engineering Geology,256,84-92.
MLA Yong-Zhan Chen,et al."Microstructure and morphological characterization of lead-contaminated clay with nanoscale zero-valent iron (nZVI) treatment".Engineering Geology 256(2019):84-92.
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