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

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

Plant, Soil and Environment, 2006, vol. 52, issue 1, 25-34

Abstract: 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 (search for similar items in EconPapers)
Date: 2006
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Persistent link: https://EconPapers.repec.org/RePEc:caa:jnlpse:v:52:y:2006:i:1:id:3342-pse

DOI: 10.17221/3342-PSE

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