Effect of KMP Stabilization on Chemical Properties of a Heavy-Metal Contaminated Site Soil
This paper presents a comprehensive investigation of chemical properties, including soil pH, acid neutralizing capacity, metal leachability and chemical speciation, of a Zn, Pb and Cd contaminated site soil stabilized by KMP. The results show that the KMP stabilized soils have lower pH and higher resistance to acid attack than the untreated soil; the KMP is effective in reducing the metal leachability and changing the metal speciation, and the corresponding leached concentrations significantly below their regulatory limits; furthermore, lower acid soluble fraction contents contributes to the lower metal leachability in contaminated soils.
KeywordsChemical speciation Phosphate Leachability Heavy metal contaminated soil
The authors appreciate the support of Environmental Protection Scientific Research Project of Jiangsu Province (Grant No. 2016031), National Natural Science Foundation of China (Grant No. 41330641 and 41472258), and National High Technology Research and Development Program of China (Grant No. 2013AA06A206).
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