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Long-term monitoring of heavy metal contents in paddy soils  

Kim, W.I. (National Institute of Agricutural Science and Technology)
Kim, M.S. (National Institute of Agricutural Science and Technology)
Roh, K.A. (National Institute of Agricutural Science and Technology)
Lee, J.S. (National Institute of Agricutural Science and Technology)
Yun, S.G. (National Institute of Agricutural Science and Technology)
Park, B.J. (National Institute of Agricutural Science and Technology)
Jung, G.B. (Rural Development Administration)
Kang, C.S. (Gyeonggido Agricultural Research & Extention Service(ARES))
Cho, K.R. (Gyeonggido Agricultural Research & Extention Service(ARES))
Ahn, M.S. (Gangwondo ARES)
Choi, S.C. (Gangwondo ARES)
Kim, H.J. (Chungbuk ARES)
Kim, Y.S. (Chungbuk ARES)
Nam, Y.K. (Chungnam ARES)
Choi, M.T. (Chungnam ARES)
Moon, Y.H. (Jeonbuk ARES)
Ahn, B.K. (Jeonbuk ARES)
Kim, H.K. (Jeonnam ARES)
Kim, H.W. (Jeonnam ARES)
Seo, Y.J. (Gyeongbuk ARES)
Kim, J.S. (Gyeongbuk ARES)
Choi, Y.J. (Gyeongnam ARES)
Lee, Y.H. (Gyeongnam ARES)
Lee, S.C. (Jeju ARES)
Hwang, J.J. (Jeju ARES)
Publication Information
Korean Journal of Soil Science and Fertilizer / v.41, no.3, 2008 , pp. 190-198 More about this Journal
Abstract
There is an increasing concern over heavy metal contamination of paddy soils and the subsequent translocation of heavy metals to rice. Objective is to monitor the status and long-term trend of heavy metal contamination in paddy soils, periodically. In 2007 survey, the average concentrations of As(arsenic), Cd(cadmium), Cu(copper), Ni(nickel), Pb(lead), and Zn(zinc) in 2,010 paddy soils nationwide were 0.87, 0.08, 3.33, 1.19, 4.95 and $4.67mg\;kg^{-1}$, respectively. Few sites, which were contaminated by As in 2003 and 2007 survey and by Ni in 1999 and 2007 survey, were over the threshold level for soil contamination designated by the Soil Environmental Conservation Act in Korea. Long-term change was shown that As, Ni, and Zn were gradually increased whereas Cd and Cu were decreased. In the distribution of extractable heavy metal contents, the modes of each heavy metal content were similar with the average contents of each heavy metals. Mean value of heavy metals except copper in paddy soils was higher than median value. It means that the downward distribution of heavy metal content in paddy rice was shown against normal distribution.
Keywords
Heavy metals; Contamination; Paddy soils; Long-term change;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
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