Characteristics of By-product Ochre from Acid Mine Drainage (AMD) Treatment and Its Potential Use
2010
Jeong, J.H., Rural Research Institute, Korea Rural Community Corporation, Ansan, Republic of Korea | Kim, H.J., The University of Seoul, Seoul, Republic of Korea | Kim, Y.N., The University of Seoul, Seoul, Republic of Korea | Nam, K.S., Mine Reclamation Corporation, Seoul, Republic of Korea | Kim, K.H., The University of Seoul, Seoul, Republic of Korea
This study was carried out to find out potential use of ochre as an agent to reduce phosphorus content in water. Ochre is a by-product from treatment of acid mine drainage (AMD) which is composed mostly of Fe₂O₃, Fe₂O₃ㆍH₂O, FeOㆍOH and Fe(OH)₃. Three ochre samples (ochre-H, ochre-D and ochre-S) were collected from three treatment facilities in Gangwon province. Physico-chemical characteristics of three ochre samples including pH, electrical conductivity, total phosphorus, available phosphorus, particle size distribution were analyzed. Scanning electron microscopy (SEM) energy dispersive spectroscopy (EDS), X-ray diffraction (XRD) and X-ray fluorescence (XRF) analysis were also carried out. In addition, experiments for phosphorus removal from water was performed. Calcium content of ochre-H was higher than that of ochre-D and ochre-S, whereas iron content of ochre-H was lower than that of ochre-D and ochre-S. All the phosphorus in water up to maximum 191,411 mg kg-¹ per unit mass of ochre was removed with ochre-H. Ochre has immense potential as an agent to reduce phosphorus content in water.
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