Dergiler / Turkish Journal of Engineering and Environmental Sciences / 2003 / Cilt: 27 - Sayı: 3
Comparison of Two Leaching Tests to Assess the Effectiveness of Cement-Based Hazardous Waste Solidification/Stabilization
- Sayfa
- 201–212
- DOI
- —
Özet
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.
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.