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Immobilization of lead by application of zeolite: Leaching column and rhizobox incubation studies
Shi, WY (Shi, Wei-yu)[ 1 ]; Li, H (Li, Hua)[ 2 ]; Du, S (Du, Sheng)[ 3 ]; Wang, KB (Wang, Kai-bo)[ 1 ]; Shao, HB (Shao, Hong-bo)[ 4 ]
2013-11-30
Source PublicationAPPLIED CLAY SCIENCE
Volume85Pages:103-108
Subtype期刊论文
Abstract

Application of zeolite can reduce lead (Pb) mobility in soil. Leaching columns and rhizobox incubation experiments were carried out to investigate the leaching processes and rhizosphere behavior of Pb in a Pb-contaminated soil amended with zeolite. Zeolite addition reduced Pb release from the contaminated soil as well as increasing leachate pH and decreasing the bioavailable Pb concentration. Leachate pH was not significantly different among different zeolite dose treatments at the same measurement time. Leaching of Pb from the treated soil was lower than that from the untreated soil for the first nine weeks but the trend was reversed for the final weeks of the study. The Pb concentration in the leachate did not appear to be sensitive to changes in pH. It was concluded that when a relatively low amount of zeolite was added (<20 mg kg(-1)), the cation exchange capacity was the dominant factor for regulating Pb leaching behavior. The DTPA extractable Pb in the rhizosphere was similar to 15% higher than that in the close-root and bulk soil. In addition, the amounts of DTPA extractable Pb in the rhizosphere soil not treated with zeolite were 10% and 16% higher than in the rhizosphere soil with 10 and 20 g kg-1 zeolite addition, respectively. It could be concluded that zeolite addition inhibits uptake of Pb by affecting rhizospheric behavior.

KeywordZeolite Lead (Pb) Leaching Processes Rhizospheric Behavior Polluted-soil Remediation
DOI10.1016/j.clay.2013.08.022
Indexed BySCI ; EI
Language英语
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Document Type期刊论文
Identifierhttp://ir.ieecas.cn/handle/361006/9988
Collection生态环境研究室
Corresponding AuthorShi, WY (Shi, Wei-yu)[ 1 ]
Affiliation1.State Key Laboratory of Loess and Quaternary Geology, Institute of Earth Environment, Chinese Academy of Sciences, Xi'an, Shaanxi 710075, China;
2.School of Environmental Science and Resources, Shanxi University, Taiyuan, Shanxi 030006, China;
3.State Key Laboratory of Soil Erosion and Dryland Farming on Loess Plateau, Institute of Soil and Water Conservation, Northwest A&F University, Yangling, Shaanxi 712100, China;
4.Yantai Institute of Coastal Zone Research, Chinese Academy of Sciences, Yantai, Shandong 264003, China
Recommended Citation
GB/T 7714
Shi, WY ,Li, H ,Du, S ,et al. Immobilization of lead by application of zeolite: Leaching column and rhizobox incubation studies[J]. APPLIED CLAY SCIENCE,2013,85:103-108.
APA Shi, WY ,Li, H ,Du, S ,Wang, KB ,&Shao, HB .(2013).Immobilization of lead by application of zeolite: Leaching column and rhizobox incubation studies.APPLIED CLAY SCIENCE,85,103-108.
MLA Shi, WY ,et al."Immobilization of lead by application of zeolite: Leaching column and rhizobox incubation studies".APPLIED CLAY SCIENCE 85(2013):103-108.
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