Comparison of Two Leaching Tests to Assess the Effectiveness of Cement-Based Hazardous Waste Solidification/Stabilization

Authors : Olcay YILMAZ

Pages : 201-212

View : 9 | Download : 6

Publication Date : 0000-00-00

Article Type : Research Paper

Abstract :The Turkish Hazardous Waste Control Regulation insert ignore into journalissuearticles values(THWCR); recognizes solidification/stabilization insert ignore into journalissuearticles values(S/S); as a promising new technology for the safe disposal of hazardous wastes. In this study, the effectiveness of S/S in terms of the reduction of contaminant mobility was evaluated through two different leaching procedures. Heavy metal enriched mining residue was used as hazardous waste. For the S/S of mining waste, Portland cement as a binding agent was mixed with mining waste at different ratios insert ignore into journalissuearticles values(10 and 20%);. Solidified samples were crushed into two different fractionation sizes insert ignore into journalissuearticles values(between 1 and 2 mm and greater than 2 mm); and subjected to the toxicity characteristic leaching procedure of the U.S. Environmental Protection Agency and the distilled water leaching procedure of the THWCR. The leaching test results showed that generally S/S produced efficiencies greater than 90% for the retention of metals in the solidified mass.
Keywords : Heavy metals, Leaching, Mining waste, Portland cement, Solidification stabilization