Plant Soil Environ., 2006, 52(1):25-34 | DOI: 10.17221/3342-PSE

Bioavailability and mobility of Pb after soil treatment with different remediation methods

N. Finžgar, B. Kos, D. Leštan
Biotechnical Faculty, University of Ljubljana, Slovenia

The risk of Pb contaminated soil after treatment with different remediation techniques was assessed. Soil vitrification (microwaves) reduced Pb orally available from the stomach and intestinal phase measured by a physiologically based extraction test. Solidification of Pb (Slovakite) did not reduce the concentration of orally available Pb and increased the Pb uptake by Thlaspi goesingens for 2-times compared to plants grown on the original soil. Soil extraction with 40 mmol/kg EDTA removed 57.6% of Pb. However, the concentration of orally available Pb and Pb uptake by T. goesingens increased. The concentration of mobile soil Pb also increased for 14-times measured by a toxicity characteristic leaching procedure. Soil leaching with 10 mmol/kg biodegradable chelator [S,S] ethylenediamine disuccinate and using a horizontal permeable reactive barrier for Pb accumulation from the washing solution removed 17.8% of Pb, but increased Pb uptake by T. goesingens by 3-times and slightly increased the concentration of Pb in the intestinal phase. Leaching did not significantly effects Pb availability from the stomach phase or Pb mobility.

Keywords: lead; soil remediation; risk assessment; heap leaching

Published: January 31, 2006  Show citation

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Finžgar N, Kos B, Leštan D. Bioavailability and mobility of Pb after soil treatment with different remediation methods. Plant Soil Environ. 2006;52(1):25-34. doi: 10.17221/3342-PSE.
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