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Efficiency of Chemical Amendments for Reducing Ecotoxicity in Heavy Metal Polluted Agricultural Fields
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 Title & Authors
Efficiency of Chemical Amendments for Reducing Ecotoxicity in Heavy Metal Polluted Agricultural Fields
Choi, Won-Suk; Kim, Dae-Bok; Hong, Young-Kyu; Kim, Soon-Oh; Lee, Sang-Woo; Lee, Byung-Tae; Lee, Sang-Hwan; Park, Mi-Jung; Kim, Sung-Chul;
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This study was conducted to evaluate effect of chemical amendments on reducing bioavailable fraction of heavy metals in soil along with ecotoxicological effect on earthworms, Eisenia fetida. Three different chemical amendments, lime (L), steel slag (SS), and acid mine drainage sludge (AMDS), were applied with varied application ratio (1, 3, 5%). Heavy metal contaminated soil was mixed with chemical amedments and earthworms, Eisenia fetida, were cultivated for 28 days. Bioavailable fraction of heavy metals (Cd, Cu, Pb, and Zn) extracted with 0.1N HCl was monitored and also, mortality, growth, and metal concentration in earthworm were assessed. Result showed that all three amendments had high efficiency to reduce bioavailable fraction of heavy metals in soil. In particular, lime showed the highest reduction rate of Cu (63.9-87.7%), Pb (7.90-24.65%), and Zn (40.83-77.60%) among three amendments. No mortality of earthworm was observed during experimental period except 3% and 5% AMDS treatment indicating that application of chemical amendments is safe in terms of ecotoxicological aspect. However, no positive correlation was observed between reduction of bioavaialble fraction of heavy metals in soil and earthworms. Overall, application of chemical amendments in agricultural field can be adapted for reducing bioavailable fraction of heavy metals and detoxification in soil.
Heavy metals;Soil;Earthworms;Mortality;Ecotoxicity;
 Cited by
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