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Characteristics of Removal and Precipitation of Heavy Metals with pH change of Artificial Acid Mine Drainage
인공 산성광산배수의 pH변화에 의한 중금속 제거 및 침전 특성 연구
Econ. Environ. Geol. 2019 Dec;52(6):529-39
Published online December 31, 2019;  https://doi.org/10.9719/EEG.2019.52.6.529
Copyright © 2019 the Korean society of economic and environmental gelology.

Min Hyeon Lee1, Young Hun Kim2 and Jeong Jin Kim3*
이민현1 · 김영훈2 · 김정진3*

1Center for Technology Policy, Future Resources Institute, Seoul 08507, Korea
2Department of Earth and Environmental Sciences, Andong National University, Andong 36729, Korea
3Department of Environmental Engineering, Andong National University, Andong 36729, Korea
미래자원연구원, 2안동대학교 환경공학과, 3안동대학교 지구환경과학과
Received September 6, 2019; Revised October 8, 2019; Accepted November 6, 2019.
This is an Open Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/by-nc/3.0) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.
 Abstract
In this study, heavy metal removal and precipitation characteristics with pH change were studied for artificial acid mine drainage. Artificial acid mine drainage was prepared using sulfates of iron, aluminum, copper, zinc, manganese which contained in acid mine drainage from abandoned mines. The single and mixed five heavy metal samples of Fe, Al, Cu, Zn, and Mn were prepared at initial concentrations of 30 and 70 mg/L. Fe and Al were mostly removed at pH 4.0 and 5.0, respectively, and other heavy metals gradually decreased with increasing pH. Concentration changes with increasing pH show generally similar trend for single and mixed heavy metal samples. The effect of removing heavy metals from aqueous solutions is not related to the initial concentration and depends on the pH change. XRD were used for mineral identification of precipitates and crystallinity of the mineral tended to increase with increasing pH. The precipitates that produced by decreasing the concentration of heavy metals in the aqueous solution composed of Fe-goethite(FeOOH), Al-basaluminite(Al4(SO4)(OH)10·4H2O), Cu-connellite(Cu19(OH)32(SO4)Cl4·3H2O) and tenorite(CuO), Zn-zincite(ZnO), and Mn-hausmannite(Mn3O4).
Keywords : acid mine drainage, heavy metal, goethite, basaluminite, hausmannite

 

December 2019, 52 (6)