Il-Ha Koh1·Yo Seb Kwon1·Mun-Ho Jeong2,3·Won Hyun Ji4*
1National Environment Lab. (NeLab), Seoul 02841, Korea
2Technology Research & Development Institute, Korea Mine Rehabilitation and Mineral Resources Corp., Wonju 26464, Korea
3Department of Energy & Climate Environment Fusion Technology, Hoseo University, Asan 31499, Korea
4Department of General Education for Human Creativity, Hoseo University, Asan 31499, Korea
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Soil aggregation begins with flocculation of clay particles triggered by interfacial reactions of polyvalent cation such as Ca2+ and Fe3+, and they are also known as important elements to control the mobility of arsenic in soil environment. The objective of this study was to investigate the feasibility of CMDS (coal mine drainage sludge) for soil loss reduction and stabilization of arsenic-contaminated soil in a 37% sloped farmland under rainfall simulation. The amount of soil loss decreased by 43% when CMDS was applied, and this result was not significantly different from the case of limestone application, which yielded 46% decrease of soil loss. However, the relative amount of dispersed clay particles in the sediment CMDS-applied soil was 10% lower than that of limestone-applied soil, suggesting CMDS is more effective than limestone in inducing soil aggregation. The concentrations of bioavailable arsenic in CMDS amended soil decreased by 46%~78%, which was lower than the amount in limestone amended soil. Therefore, CMDS can be used as an effective amendment material to reduce soil loss and stabilize arsenic in sloped farmland areas.
Keywords: Soil loss, Sloped farmland, CMDS (coal mine drainage sludge), Arsenic, Stabilization
2021; 26(6): 18-26
Published on Dec 31, 2021
Department of General Education for Human Creativity, Hoseo University, Asan 31499, Korea