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  • Title: Influence of particle size preparation of MSW incineration residues on heavy metal leaching behavior in leaching tests.
    Author: Mizutani S, Watanabe N, Sakai S, Takatsuki H.
    Journal: Environ Sci; 2006; 13(6):363-70. PubMed ID: 17273152.
    Abstract:
    This study examines the influence of particle size preparation on leaching tests of heavy metal leaching behavior of municipal solid waste (MSW) incineration fly ash and MSW melting slag. The MSW incineration fly ash and melting slag were divided into 2-3 fractions by sieving. The metal contents of the respective fractions were determined and the representativeness of the samples was verified. Differences in the metal contents of the fractions with different particle sizes were significant for MSW incineration fly ash. Therefore, particle size preparation by sieving should not be done prior to these leaching tests. In contrast, differences in metal contents of different particle sizes of melting slag were not significant. Therefore, sample fractions with identical metal contents are obtainable by sieving. The metal leaching quantities by the Japanese Leaching Test Method No. 19 (JLT-19) depend on the chemical stability and particle size preparation of slag. The modified basicity, [(CaO+MgO+Na(2)O+K(2)O) / (SiO(2)+Al(2)O(3))], is useful as an index of the chemical stability of slag.
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