Alterations of municipal solid waste incineration residues in a landfill

Research output: Contribution to journalArticle

8 Citations (Scopus)

Abstract

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.

Original languageEnglish
Pages (from-to)1444-1451
Number of pages8
JournalWaste Management
Volume27
Issue number10
DOIs
Publication statusPublished - Jul 30 2007

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municipal solid waste
landfill
hydroxide
weathering
leaching
heavy metal
hydration
thin section
stabilization
drilling
adsorption
carbonate
incineration residue
mineral
test

All Science Journal Classification (ASJC) codes

  • Waste Management and Disposal

Cite this

Alterations of municipal solid waste incineration residues in a landfill. / Shimaoka, Takayuki; Zhang, R.; Watanabe, Koichiro.

In: Waste Management, Vol. 27, No. 10, 30.07.2007, p. 1444-1451.

Research output: Contribution to journalArticle

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