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Please use this identifier to cite or link to this item: http://hdl.handle.net/1942/2583

Title: Amendment-induced immobilization of lead in a lead-spiked soil: Evidence from phytotoxicity studies
Authors: Geebelen, Wouter
Vangronsveld, Jaco
Adriano, Domy
Carleer, Robert
Clijsters, Herman
Issue Date: 2002
Citation: WATER AIR AND SOIL POLLUTION, 140(1-4). p. 261-277
Abstract: Lead immobilization was evaluated on soils spiked with increasing concentrations of Pb (as Pb-acetate) using the following soil amendments: bentonite, zeolite, cyclonic ash, compost, lime, steelshot, and hydroxyapatite. The immobilization efficacy of the amendments was evaluated according to the following criteria: Ca(NO3)(2)-extractable Pb as an indicator of Pb phytoavailability, morphological and enzymatic parameters of bean plants (Phaseolus vulgaris) as indicator of phytotoxicity, and Pb concentration in edible tissue of lettuce (Lactuca sativa). The lowest reductions in Ca(NO3)(2)-extractable soil Pb occurred when bentonite and steelshot were applied. Phytotoxicity from application of steelshot was confounded by toxic amounts of Fe and Mn released from the by-product which killed the lettuce seedlings. Addition of zeolite induced poor plant growth independent of Pb concentration due to its adverse effect on soil structure. Substantial reductions in Ca(NO3)(2)-extractable Pb were observed when cyclonic ash, lime, compost and hydroxyapatite were applied. In general, these amendments reduced Pb phytotoxicity concomitant with reduced Pb concentration in lettuce tissue. Cyclonic ash, lime and compost further improved plant growth and reduced oxidative stress at low soil Pb concentrations due to soil pH increase mitigating Al or Mn toxicity.
Notes: Limburgs Univ Ctr, Ctr Environm Sci, B-3590 Diepenbeek, Belgium. Univ Georgia, Savannah River Ecol Lab, Aiken, SC 29802 USA.Geebelen, W, Limburgs Univ Ctr, Ctr Environm Sci, Univ Campus, B-3590 Diepenbeek, Belgium.
URI: http://hdl.handle.net/1942/2583
DOI: 10.1023/A:1020147901365
ISI #: 000177838900015
ISSN: 0049-6979
Category: A1
Type: Journal Contribution
Validation: ecoom, 2003
Appears in Collections: Research publications

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