TY - JOUR
T1 - A continuous pilot-scale system using coal-mine drainage sludge to treat acid mine drainage contaminated with high concentrations of Pb, Zn, and other heavy metals
AU - Cui, Mingcan
AU - Jang, Min
AU - Cho, Sang Hyun
AU - Khim, Jeehyeong
AU - Cannon, Fred S.
N1 - Funding Information:
This research is supported by the Korean Ministry of Environment as “The GAIA Project No: 173-091-003.”
PY - 2012/5/15
Y1 - 2012/5/15
N2 - A series of pilot-scale tests were conducted with a continuous system composed of a stirring tank reactor, settling tank, and sand filter. In order to treat acidic drainage from a Pb-Zn mine containing high levels of heavy metals, the potential use of coal-mine drainage sludge (CMDS) was examined. The pilot-scale tests showed that CMDS could effectively neutralize the acidic drainage due to its high alkalinity production. A previous study revealed that calcite and goethite contained in CMDS contributed to dissolutive coprecipitation and complexation with heavy metals. The continuous system not only has high removal efficiencies (97.2-99.8%), but also large total rate constants (K total, 0.21-10.18h -1) for all heavy metals. More specifically, the pilot system has a much higher Zn(II) loading rate (45.3gm -3day -1) than other reference systems, such as aerobic wetland coupled with algal mats and anoxic limestone drains. The optimum conditions were found to be a CMDS loading of 280gL -1 and a flow rate of 8Lday -1, and the necessary quantity of CMDS was 91.3gL -1day -1, as the replacement cycle of CMDS was determined to be 70 days.
AB - A series of pilot-scale tests were conducted with a continuous system composed of a stirring tank reactor, settling tank, and sand filter. In order to treat acidic drainage from a Pb-Zn mine containing high levels of heavy metals, the potential use of coal-mine drainage sludge (CMDS) was examined. The pilot-scale tests showed that CMDS could effectively neutralize the acidic drainage due to its high alkalinity production. A previous study revealed that calcite and goethite contained in CMDS contributed to dissolutive coprecipitation and complexation with heavy metals. The continuous system not only has high removal efficiencies (97.2-99.8%), but also large total rate constants (K total, 0.21-10.18h -1) for all heavy metals. More specifically, the pilot system has a much higher Zn(II) loading rate (45.3gm -3day -1) than other reference systems, such as aerobic wetland coupled with algal mats and anoxic limestone drains. The optimum conditions were found to be a CMDS loading of 280gL -1 and a flow rate of 8Lday -1, and the necessary quantity of CMDS was 91.3gL -1day -1, as the replacement cycle of CMDS was determined to be 70 days.
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U2 - 10.1016/j.jhazmat.2012.02.042
DO - 10.1016/j.jhazmat.2012.02.042
M3 - Article
C2 - 22421342
AN - SCOPUS:84859269743
SN - 0304-3894
VL - 215-216
SP - 122
EP - 128
JO - Journal of Hazardous Materials
JF - Journal of Hazardous Materials
ER -