Esakku, S., Karthikeyan, O.P., Joseph, Kurian, and Nagendran, R. (2008) Heavy metal fractionation and leachability studies on fresh and partially decomposed municipal solid waste. Practice Periodical of Hazardous, Toxic, and Radioactive Waste Management, 12 (2). pp. 127-132.

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Abstract

Leaching of Cd, Cr, Cu, Pb, Ni, and Zn from fresh and partially decomposed municipal solid wastes using acid digestion (AD), multiple extraction procedure (MEP), toxicity characteristic leaching procedure (TCLP), and equilibrium leach test (ELT) was carried out. Sequential extraction studies were conducted to evaluate the mobility of heavy metal ions by fractionating into exchangeable, acid extractable, oxidizable, reducible, and residual fractions. The extraction efficiency of the tests decreased in the following order: AD > MEP > TCLP > ELT. Less than 45 of the metal contents were in bioavailable (exchangeable and acid extractable) form, except Ni. Total and TCLP extractable metal contents were within the limits prescribed for USEPA compost and TCLP regulating limits, respectively.

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