Migration of ^<137>Cs Extracted from Contaminated Tea in Sandy Clay Soil
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概要
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The migration behavior of <SUP>137</SUP>Cs extracted from the contaminated tea at Chernobyl accident in sandy clay soil has been studied by batch and column experiments. Time dependent sorption behavior of <SUP>137</SUP>Cs extracted from the tea reaches equilibrium slower by 6.5 times than <SUP>137</SUP>Cs<SUP>+</SUP> ions. However, the distribution coefficient of <SUP>137</SUP>Cs extracted from the tea for the sandy clay soil was higher than that of <SUP>137</SUP>Cs<SUP>+</SUP> ions. These results indicate that the sorption of the <SUP>137</SUP>Cs attached to the organic materials dissolved from the tea on the sandy clay soil is slower than that of <SUP>137</SUP>Cs<SUP>+</SUP> ions, and the <SUP>137</SUP>Cs attached to the organic materials have more affinity to the sandy clay soil than <SUP>137</SUP>Cs<SUP>+</SUP> ions.<BR>In the column experiments, most part of <SUP>137</SUP>Cs were adsorbed on the top of soil layer 0-10cm in depth and small amounts of <SUP>137</SUP>Cs were flowed out from the soil layer. The concentration profile at the top of soil layer of 0-10cm is in agreement with that estimated by the dispersion-transport equation considered ion-exchange reaction indicating that the migration of <SUP>137</SUP>Cs extracted from the contaminated tea at the portion of high concentration is dominated by ion-exchange reaction. However, the concentration profile at deeper depth than 10cm is not fitted by estimation by such equation. Therefore, the mechanism other than ion-exchange dominates the migration of <SUP>137</SUP>Cs in the portion of low concentration.
- 社団法人 日本原子力学会の論文
- 1995-06-25
著者
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Ozmen Atilla
Ankara Nuclear Research And Training Center Turkish Atomic Energy Authority
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Yucel Haluk
Ankara Nuclear Research And Training Center Turkish Atomic Energy Authority