Korean Journal of Environmental Agriculture (한국환경농학회지)
- Volume 10 Issue 2
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- Pages.119-127
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- 1991
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- 1225-3537(pISSN)
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- 2233-4173(eISSN)
Effects of soil solution pH on adsorption and desorption of Cd, Cu and Zn by soils
토양중(土壤中)에서 Cd, Cu 및 Zn의 흡착(吸着) 및 용탈(溶脫)에 미치는 토양용액(土壤溶液) pH의 영향(影響)
- Published : 1991.10.11
Abstract
In order to reveal the mechanism of heavy metal behavior in soils relating to factors such as soil pH, organic matter, C.E.C. and soil minerals influencing the activities of heavy metals, Cd, Cu and Zn were applied to soil columns filled with 8 different soils with adjusted soil pH to several levels between 3.0 to 11.0 and the amounts of adsorption and desorption of these heavy metals were measured. 1. At the adsorption maxima of three heavy metals(Cd, Cu and Zn) soil pH appeared to be near 6.0 regardless of properties of the 8 soils, and adsorption gradually decreased above and below pH 6.0. This phenomenon was the same in both heavy metal solutions and mixed solutions, and the mixed solution, containing three heavy metals, revealed slightly higher amounts of Cu adsorption and Cd adsorption. 2. It was also found that the adsorption of Cu and Zn by soils was positively correlated with C.E.C. and the organic matter of soils, respectively. However, the pH values showing maxima of heavy metal adsorption were negatively correlated with organic matter content by contrast with the correlation between the maxima and the C.E.C. values in soils. 3. The adsorption of Cu by soils markedly increased more with
본 실험(實驗)에서는 여러 가지 중금속(重金屬) 종류중 Cd, Zn, Cu의 토양(土壤) 중에서의 행동(용해도(溶解度))에 대한 기작을 규명하기 위하여 8종(種)의 토양(土壤)을 이용하여 토양(土壤) Column을 만들고 각기 다른 농도의 중금속(重金屬)을 단독(單獨) 및 혼합처리(混合處理)하고 pH를
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