STP851

    Chemical Interactions of Soluble Silicates in the Management of Hazardous Wastes

    Published: Jan 1984


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    Abstract

    Batch and flow leaching studies were carried out using a lime-precipitated plating waste sludge to study the influence of soluble silicates on metal ion leachability. A reduction in metal ion leaching was observed when soluble silicates were used either alone or with a portland cement/fly ash combination. These results suggest that sodium silicate reduces the solubility of metal ions in the waste matrix in addition to protecting the matrix from mild acidic breakdown.

    Keywords:

    hazardous wastes, industrial wastes, soluble silicates, solidification, leaching, cement, fly ash


    Author Information:

    Falcone, JS
    Technical manager, Industrial Chemicals Research and Development, research and development chemist, technical service representative, and senior chemist, The PQ Corp., Research and Development Center, Lafayette Hill, Pa.

    Spencer, RW
    Technical manager, Industrial Chemicals Research and Development, research and development chemist, technical service representative, and senior chemist, The PQ Corp., Research and Development Center, Lafayette Hill, Pa.

    Reifsnyder, RH
    Technical manager, Industrial Chemicals Research and Development, research and development chemist, technical service representative, and senior chemist, The PQ Corp., Research and Development Center, Lafayette Hill, Pa.

    Katsanis, EPL
    Technical manager, Industrial Chemicals Research and Development, research and development chemist, technical service representative, and senior chemist, The PQ Corp., Research and Development Center, Lafayette Hill, Pa.


    Paper ID: STP32703S

    Committee/Subcommittee: D34.01

    DOI: 10.1520/STP32703S


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