Journal
PLANT SOIL AND ENVIRONMENT
Volume 52, Issue 1, Pages 25-34Publisher
CZECH ACADEMY AGRICULTURAL SCIENCES
DOI: 10.17221/3342-PSE
Keywords
lead; soil remediation; risk assessment; heap leaching
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Funding
- Slovenian Ministry for Education, Science and Sport [J4-6134-0481-04/4.03]
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The risk of Pb contaminated sod 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, hut 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.
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