Heavy Metal Fractionation and Leachability Studies on Fresh and Partially Decomposed Municipal Solid Waste
Publication: Practice Periodical of Hazardous, Toxic, and Radioactive Waste Management
Volume 12, Issue 2
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: . 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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Acknowledgments
The writers acknowledge financial support from the Swedish International Development Cooperation Agency (Sida) and technical coordination from the Asian Institute of Technology (AIT), Thailand. Corporation of Chennai is gratefully acknowledged for their coordination during sample collection.
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Published In
Practice Periodical of Hazardous, Toxic, and Radioactive Waste Management
Volume 12 • Issue 2 • April 2008
Pages: 127 - 132
Copyright
© 2008 ASCE.
History
Received: Oct 17, 2007
Accepted: Oct 17, 2007
Published online: Apr 1, 2008
Published in print: Apr 2008
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