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Effect of pH and Temperature on the Adsorption of Heavy Metals in Acid Mine Drainage (AMD) Onto Coal Mine Drainage Sludge (CMDS)  

Cui, Ming-Can (Determent of Civil Environmental and Architecture, Korea University)
Lim, Jung-Hyun (Determent of Civil Environmental and Architecture, Korea University)
Kweon, Bo-Youn (Determent of Civil Environmental and Architecture, Korea University)
Jang, Min (Mine Reclamation Corporation)
Shim, Yon-Sik (Mine Reclamation Corporation)
Khim, Jee-Hyeong (Determent of Civil Environmental and Architecture, Korea University)
Publication Information
Journal of Soil and Groundwater Environment / v.14, no.1, 2009 , pp. 29-35 More about this Journal
Abstract
In this study, the effect of pH and temperature on the adsorption behavior of acid mine drainage (AMD) on coal mine drainage sludge (CMDS) has been investigated during the treatment of coal mine drainage (CMD) by electrical purification method. The pH$_{zero\;point\;charge}$ (pH$_{zpc}$) of CMDS was 5. The removal ratio of copper, zinc, cadmium, iron were increased according to the increase of pH value. The adsorption amount of copper showed 0.64 mg g$^{-1}$ sludge. It was independent of pH value. The adsorption amount of the other metals showed l.l times when pH was 3. The adsorption amount of chromium was a little bit increased at the pH value higher than 7 due to a small amount of the chromium was eluted as $Cr(OH)_6^{3-}$. The amount of metals' absorption were decreased according to temperature was increase at pH value was 3. The selectivity order was Cd>Fe > Zn > Cu. The amount of absorption showed q$_{max}$ Cu 2.747 mg g$^{-1}$ andZn 2.525 mg g$^{-1}$ when pH value higher than 5. It was independent of temperature.
Keywords
AMD; CMDS; Adsorption; pH effect; Temperature effect;
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