STP1123

    Chemical Fixation of Flue Gas Desulfurization Sludges and Fly Ash

    Published: Jan 1992


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    Abstract

    A study is under way to investigate the heavy metal binding mechanisms in solidified/stabilized high sulfur coal fly ash and flue gas desulfurization (FGD) sludges. Fly ash and sludge from a typical wet FGD process and dry flue gas desulfurization by-product from a demonstration lime injection multistage burner (LIMB) process are being evaluated. The latter material contains substantial portions of available lime and may prove amenable as a solidifying agent with the fly ash. This paper describes initial results on the waste characterization, solidified/stabilized waste form formulation, and influence of liquid/solid ratio on metal leaching from the waste forms.

    Keywords:

    stabilization/solidification, fixation, fly ash, flue gas desulfurization sludge, leaching, metals, LIMB ash


    Author Information:

    Bishop, PL
    Professor and head, University of Cincinnati, Cincinnati, OH

    Keener, TC
    Associate professor, University of Cincinnati, Cincinnati, OH

    Dusing, DC
    Graduate research assistants, University of Cincinnati, Cincinnati, OH

    Gong, R
    Graduate research assistants, University of Cincinnati, Cincinnati, OH

    Li, C-L
    Graduate research assistants, University of Cincinnati, Cincinnati, OH


    Paper ID: STP19545S

    Committee/Subcommittee: D34.07

    DOI: 10.1520/STP19545S


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