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Assessment of Adsorption Capacity of Mushroom Compost in AMD Treatment Systems  

Yong, Bo-Young (Korea Institute of Geoscience and Mineral Resources)
Cho, Dong-Wan (Department of Environmental Engineering, Yonsei University)
Jeong, Jin-Woong (Department of Geology and Earth Environmental Science, Choongnam University)
Lim, Gil-Jae (Korea Institute of Geoscience and Mineral Resources)
Ji, Sang-Woo (Korea Institute of Geoscience and Mineral Resources)
Ahn, Joo-Sung (Korea Institute of Geoscience and Mineral Resources)
Song, Ho-Cheol (Korea Institute of Geoscience and Mineral Resources)
Publication Information
Economic and Environmental Geology / v.43, no.1, 2010 , pp. 13-20 More about this Journal
Abstract
Acid mine drainage (AMD) from abandoned mine sites typically has low pH and contains high level of various heavy metals, aggravating ground- and surface water qualities and neighboring environments. This study investigated removal of heavy metals in a biological treatment system, mainly focusing on the removal by adsorption on a substrate material. Bench-scale batch experiments were performed with a mushroom compost to evaluate the adsorption characteristics of heavy metals leached out from a mine tailing sample and the role of SRB in the overall removal process. In addition, adsorption experiments were perform using an artificial AMD sample containing $Cd^{2+}$, $Cu^{2+}$, $Pb^{2+}$ and $Zn^{2+}$ to assess adsorption capacity of the mushroom compost. The results indicated Mn leached out from mine tailing was not subject to microbial stabilization or adsorption onto mushroom compost while microbially mediated stabilization played an important role in the removal of Zn. Fe leaching significantly increased in the presence of microbes as compared to autoclaved samples, and this was attributed to dissolution of Fe minerals in the mine tailing in a response to the depletion of $Fe^{3+}$ by iron reduction bacteria. Measurement of oxidation reduction potential (ORP) and pH indicated the reactive mixture maintained reducing condition and moderate pH during the reaction. The results of the adsorption experiments involving artificial AMD sample indicated adsorption removal efficiency was greater than 90% at pH 6 condition, but it decreased at pH 3 condition.
Keywords
acid mine drainage; adsorption; biological treatment; organic substrate; sulfate reducing bacteria;
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Times Cited By KSCI : 1  (Citation Analysis)
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