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Waste Management & Research, Vol. 12, No. 5, 405-415 (1994)
DOI: 10.1177/0734242X9401200504

Solidification/Stabilization Process for Steel Foundry Dust Using Cement Based Binders: Influence of Processing Variables

Ana Andrés

Departamento de Química, Escuela Politécnica Superior de Ingenieria, Universidad de Cantabria, Calle Sevilla, 6. 39001 Santander, Spain

J. Angel Irabien

Departamento de Química, Escuela Politécnica Superior de Ingenieria, Universidad de Cantabria, Calle Sevilla, 6. 39001 Santander, Spain

The influence of processing variables: mixing time, waste/binder ratio and water/ solid ratio on the solidification/stabilization process of steel foundry dust has been studied. The characterization of the final product was based on the Toxic Characterization Leaching Procedure (TCLP) followed by the biotoxicity (bioluminescence assay) and concentration of the metals, Cr, Cd, Pb and Zn in the leachates. The final product characteristics depend mainly on the waste/binder ratio, as a function of the metal hydroxide solubilities. The results of this work allow one to establish the optimization of a solidification/stabilization process for steel foundry dust.

Key Words: Steel foundry dust • waste characterization • toxicity reduction • metallic wastes • solidification/stabilization • toxicity • bioluminescent.


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