Abstract
The study is focused on the sorption characteristics of strontium on soils for predicting the migration into deeper layers. Soils were collected from the surface to 8m depth of layers by boring at three districts in Japan. All soil samples exhibited the sorption characteristics of Sr in accordance with the Freundlich type isotherm equilibrium within the range of the Sr concentration of 10-5 to 10-3μeq/ml. The 1/n values shown as the exponent for C in the Freundlich equation were close to 1.0. This finding led to the assumption that the sorption isotherm should be expressed by Henry type isotherm equilibrium for the Sr. The Kd values were positively correlated to CEC, the exchangeable Sr and Ca in soils excluding Konno soil. This result suggests that the Sr sorption reaction takes place on the surface of soil particles. The Kd values were also correlated to organic matter contents.
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