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Fraction and Soil Pollution Assesment Index of heavy metals in cultivated land soils near the abandoned mine  

김휘중 (강원대학교 자연과학대학 환경과학과)
양재의 (강원대학교 생물환경학부)
이재영 (서울시립대학교 환경공학부)
최상일 (광운대학교 환경공학과)
전상호 (강원대학교 자연과학대학 환경과학과)
Publication Information
Journal of Soil and Groundwater Environment / v.8, no.4, 2003 , pp. 53-63 More about this Journal
Abstract
Objectives of this research were to fractionate heavy metals in soil samples in the upper Okdong River basin and to assess the potential pollution index of each metal fraction. Soil samples were collected from the cultivated land soils and analyzed for physical and chemical properties. pH of cultivated soils ranged from 5.2 to 7.6. Contents of total kelhaldal nitrogen and loss on ignition were in the ranges of 0.6∼2.5%, and 1.9∼12.9%, respectively. Heavy metals in the cultivated land soils were higher in the abandoned closed coal mine near field soils than those in the paddy soils. Total concentrations of metals in the cultivated land soils were in the orders of Zn > Pb > Ni > Cu > Cd, exceed the corrective action level of the Soil Environment Conservation Law and higher than the naturals were abundance levels reported from uncontaminated cultivated land soils. Mobile fractions of metals were relatively small compared to the total concentrations. Soil Pollution Assesment Index (SPAI) values of each fraction of metals were leveled from Non polluted to Moderately polluted based on total concentrations. SPAI values of mobil fractions were lower than those of immobile fractions. Results on metal fractions and SPAI values of the cultivated land soils indicate that field soils samples were contaminated with heavy metals and had potential to cause a detrimental effects on plants. A prompt countermeasure to prevent field soils in the abandoned closed coal mine near fields are urgently needed.
Keywords
Cultivated land soil; Paddy soil; Field soil; Metal fraction; Soil Pollution Assesment Index;
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