Publication: Fractionation of lead in soils affected by smelter activities using a continuous-flow sequential extraction system
Issued Date
2005-07-15
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ISSN
10290397
03067319
03067319
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2-s2.0-33745058972
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Mahidol University
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SCOPUS
Bibliographic Citation
International Journal of Environmental Analytical Chemistry. Vol.85, No.8 (2005), 567-583
Suggested Citation
Namfon Tongtavee, Juwadee Shiowatana, Ronald G. McLaren Fractionation of lead in soils affected by smelter activities using a continuous-flow sequential extraction system. International Journal of Environmental Analytical Chemistry. Vol.85, No.8 (2005), 567-583. doi:10.1080/03067310500140345 Retrieved from: https://repository.li.mahidol.ac.th/handle/123456789/16438
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Title
Fractionation of lead in soils affected by smelter activities using a continuous-flow sequential extraction system
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Abstract
A continuous-flow sequential extraction system was used to study the distribution of Pb, and its association with other elements (Fe, Al and Ca), in soils around a Pb smelter. Soil samples were analysed by a four-step continuous-flow sequential extraction procedure employing a modified Tessier/BCR scheme. Recoveries of Pb using the flow system (88-111%) were higher than those obtained using a conventional batch extraction system. There were also some differences in Pb distribution between fractions as determined using the two extraction systems. The most abundant fraction of Pb was extracted during the dissolution of soil oxides (Fe/Al). Extractograms (plots of concentration of elements vs . extractant volume/time) indicated that anthropogenic Pb was predominantly adsorbed onto Fe oxide surfaces in contaminated soils. In soil profiles, the highest amounts of Pb were found in the topsoil surface layers (0-5 cm) of the contaminated soils with only limited movement into subsurface layers. © 2005 Taylor & Francis Group Ltd.