Heavy Metal Fractionation and Leachability Studies on Fresh and Partially Decomposed Municipal Solid Waste

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: