- Turkish Journal of Engineering and Environmental Sciences
- Vol: 27 Issue: 3
- Comparison of Two Leaching Tests to Assess the Effectiveness of Cement-Based Hazardous Waste Solidif...
Comparison of Two Leaching Tests to Assess the Effectiveness of Cement-Based Hazardous Waste Solidification/Stabilization
Authors : Olcay YILMAZ
Pages : 201-212
View : 4 | Download : 1
Publication Date : 9999-12-31
Article Type : Makaleler
Abstract :The Turkish Hazardous Waste Control Regulation (THWCR) recognizes solidification/stabilization (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 (10 and 20%). Solidified samples were crushed into two different fractionation sizes (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