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Assessment of Heavy Metals from Landfill Leachate Contaminated to Soil: A Case Study of Kham Bon Landfill, Khon Kaen Province, NE Thailand

Author(s): Udomporn Chuangcham | Wanpen Wirojanagud | Punya Charusiri | William Milne-Home | Rungruang Lertsirivorakul

Journal: Journal of Applied Sciences
ISSN 1812-5654

Volume: 8;
Issue: 8;
Start page: 1383;
Date: 2008;
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Keywords: hazardous waste | municipal waste | heavy metals contamination | Soil contamination | opened dump site | red loess

The distribution of heavy metals in landfill leachate contaminated to soil was investigated. Soil samples were collected at different times of the year as well as at various locations and depths in and around the landfill and throughout the contaminated area. The physical and chemical properties of the samples were analyzed. The results indicated that the heavy metals, namely Cd, Cr, Pb, Cu and Zn were significant concentrations in the soil within a radius of 2,000 m from the landfill. The Spearman�s rank correlation coefficient indicated that the appearance of high Cation exchange capacity, clay content and organic matter are statistically correlated with the high heavy metals accumulation. Moreover, the Fe and Mn oxide/oxyhydroxides plays important role in controlling heavy metals sink in soil as pointed out by the Spearman �s rank correlation coefficient which corresponding to the soil type, red loess with high iron oxide, in the study area.
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