Evaluating Heavy Metal Stabilization Efficiency of Chemical Amendment in Agricultural Field: Field Experiment
2011
Oh, S.J., Kangwon National University, Chuncheon, Republic of Korea | Kim, S.C., Kangwon National University, Chuncheon, Republic of Korea | Yoon, H.S., Kangwon National University, Chuncheon, Republic of Korea | Kim, H.N., Kangwon National University, Chuncheon, Republic of Korea | Kim, T.H., Kangwon National University, Chuncheon, Republic of Korea | Yeon, K.H., Korea Mine Reclamation Corporation, Seoul, Republic of Korea | Lee, J.S., Korea Mine Reclamation Corporation, Seoul, Republic of Korea | Hong, S.J., Tae Seo, Inc., Taebaek, Republic of Korea | Yang, J.E., Kangwon National University, Chuncheon, Republic of Korea
Residual of heavy metals originated from abandoned metal mines in agricultural field can cause adverse effect on ecosystem and eventually on human health. For this reason, remediation of heavy metal contaminated agriculture field is a critical issue. In this study, five different amendments, agriculture lime, dolomite, steel slag, zeolite, and compost, were evaluated for stabilization efficiency of heavy metals in agricultural field. Applied mixing ratio of amendments was varied (2% or 6%) depending on properties of amendments. Result showed that soil pH was increased compared to control (6.1-6.7) after mixing with amendments and ordered as dolomite (7.2~8.3) greater than steel slag (6.7~8.1) greater than agriculture lime (6.6~7.4) greater than zeolite (6.2~6.9) greater than compost (6.1~7.1). Among other amendments, agriculture lime, steel slag, and dolomite showed the highest stabilization efficiency of heavy metals in soil. For Cd, stabilization efficiency was 49~72%, 51~83%, and 0~36% for agriculture lime, steel slag, and dolomite respectively. In case of Pb, 43~64, 37~73%, and 51~73% of stabilization efficiency was observed for agriculture lime, steel slag, and dolomite respectively. However, minimal effect of heavy metal stabilization was observed for zeolite and compost. Based on result of this study, amendments that can increase the soil pH were the most efficient to stabilize heavy metal residuals and can be adapted for remediation purpose in agricultural field.
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