Dehydration of a Coal Mine Drainage Sludge for the Potential Landfill Cover
2008
Cui, Ming Can (Korea University, Seoul, Republic of Korea) | Lim, J.H. (Korea University, Seoul, Republic of Korea) | Yeaui, Phyung (Korea University, Seoul, Republic of Korea) | Jang, M. (Mine Reclamation Corporation, Seoul, Republic of Korea) | Shim, Y.S. (Mine Reclamation Corporation, Seoul, Republic of Korea) | Khim, J.H. (Korea University, Seoul, Republic of Korea), E-mail: [email protected]
A coal mine drainage sludge(designated as CMDS) is mainly generated during physicochemical treatment or electrical purification of the drainage abandoned mine that include dissolved heavy metal. To understand the possibility of an application of the dehydrated CMDS as the landfill cover medium of hygienic a reclaimed ground, an laboratory experiment was performed to investigate the physicochemical and geoengineering characteristics of the dehydrated CMDS. To improve the geoengineering characteristics of the dehydrated CMDS, the liquid limit, plasticity limit test, compaction method test, strength test, and hydraulic conductivity test ware performed with the lithification material mixed sludge. When the mixed ratio of the sludge and the lithification material was more than 1:06, the compaction method was A method, the moisture content less than 33.5%, the strength of mixed sludge was 8.2 kg cm-², the hydraulic conductivity was 2.7 × 10∨-6 cm sec-¹, the sludge was up to the landfill standard of US Environmental Protection Agency (US EPA).
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