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KMID : 1024520100190020255
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Journal of the Environmental Sciences
2010 Volume.19 No. 2 p.255 ~ p.260
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Stabilization of Heavy Metal Contaminated Soil Amended with Waste Cow Bone
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Lim Jung-Hyeon
Choi Myung-Chan
Moon Duk-Hyeon
Kim Ji-Hyung
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Abstract
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A stabilization/solidification (S/S) process for lead (Pb) contaminated soils was evaluated using waste cow bone containing apatite like compounds. Soil samples obtained form firing range were treated with waste cow bone. The effectiveness of stabilization was evaluated based on the Korean Standard Leaching Test (KSLT) and soil pH. The leached concentration reduced with increased in dose of waste cow bone. Overall, the KSLT results showed that Pb concentration in soils are significantly affected by amount of waste cow bone. When soil amended with 20 % of waste cow bone, less than 0.1 mg/kg was leached, and soil pH was increased from 6.5 to 8.4. Same results were obtained when finer waste cow bone was applied. The reachable concentration of Pb in soil showed in inversely proportional to solid/liquid ratio. Aging periods indicate improving mix design was applied. Relatively high lead concentrations was observed at the first 1 days, however leaching profile are reduced significantly over time for all mix designs.
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KEYWORD
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Heavy metal, Contaminated soil, Waste cow bone, Mixing ratio, Water content curing period
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