TY - JOUR
T1 - Alterations of municipal solid waste incineration residues in a landfill
AU - Shimaoka, T.
AU - Zhang, R.
AU - Watanabe, K.
N1 - Funding Information:
This research was undertaken in the Laboratory of Environmental Systems Analysis and Control Engineering, Kyushu University, Japan. The authors want to express their sincere gratitude to the Ministry of Environment and the 21 st century Center of Excellence (COE) program of the Ministry of Education, Culture, Sports, Science and Technology in Japan for financial support of this research. Field surveys were conducted with the cooperation of the Okagaki Cleaning Center, Northern Fukuoka Prefecture, Japan. The authors sincerely appreciate their support. The authors also thank Prof. Koichiro Watanabe and Mr. Ryuta Yoshikawa for modal compositions analysis; and appreciate all members of our group for contributions to field surveys and sampling.
PY - 2007
Y1 - 2007
N2 - Fresh municipal solid waste incineration residues (MSWIR) and a drilling core of 2-10 years old landfilled MSWIR were investigated to determine the alterations due to weathering in a landfill. Physical and geochemical properties and transformations of major components and heavy metals were analyzed for fresh and landfilled residues. Carbonates and hydroxides (10-12 vol%) as major mineralogical compositions in the 8-10 years weathered MSWIR were observed by modal analysis of thin sections. Three step sequential extractions indicated that reducible phases, mainly the Fe, Al and Mn hydroxides increased with depth in the landfill. A pH controlled leaching test (including availability test and pH dependent leaching test) was then conducted. Results indicated lower concentrations of leachable contents at pH values from 6 to 10 for the four elements (Pb, Zn, Al and Fe) in the 8-10 years landfilled residues than in the fresh and 1-2 years landfilled residues. This means that 8-10 years weathered MSWIR became more stable than fresh landfilled residues. The reasons for the stabilization of these elements might be the hydration of Al and Fe during weathering in the landfill, which then results in the heavy metals adsorptions of these minerals.
AB - Fresh municipal solid waste incineration residues (MSWIR) and a drilling core of 2-10 years old landfilled MSWIR were investigated to determine the alterations due to weathering in a landfill. Physical and geochemical properties and transformations of major components and heavy metals were analyzed for fresh and landfilled residues. Carbonates and hydroxides (10-12 vol%) as major mineralogical compositions in the 8-10 years weathered MSWIR were observed by modal analysis of thin sections. Three step sequential extractions indicated that reducible phases, mainly the Fe, Al and Mn hydroxides increased with depth in the landfill. A pH controlled leaching test (including availability test and pH dependent leaching test) was then conducted. Results indicated lower concentrations of leachable contents at pH values from 6 to 10 for the four elements (Pb, Zn, Al and Fe) in the 8-10 years landfilled residues than in the fresh and 1-2 years landfilled residues. This means that 8-10 years weathered MSWIR became more stable than fresh landfilled residues. The reasons for the stabilization of these elements might be the hydration of Al and Fe during weathering in the landfill, which then results in the heavy metals adsorptions of these minerals.
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U2 - 10.1016/j.wasman.2007.03.011
DO - 10.1016/j.wasman.2007.03.011
M3 - Article
C2 - 17656082
AN - SCOPUS:34547100535
SN - 0956-053X
VL - 27
SP - 1444
EP - 1451
JO - Waste Management
JF - Waste Management
IS - 10
ER -
