Akademik Veri Yönetim Sistemi
RADIATION PHYSICS AND CHEMISTRY, cilt.47, sa.1, ss.117-123, 1996 (SCI-Expanded)
The effect of the organic material of tea on the adsorption behavior of Cs-137 On the silty clay soil has been examined by batch experiments, using Cs-137 extracted from tea, contaminated by the Chernobyl accident, with water. The variation of K-d values was studied as a function of contact time and a volume-solid ratio (V/m). The equilibration time of Cs-137 extracted from the tea is slower by 9 times than that of Cs-137(+) ions for the silty clay soil. The V/m ratio did not affect the Cs-137 adsorption strongly. The sorption of Cs-137 extracted from the tea in terms of the distribution coeflicient K-d is higher (a factor of 2.5) than that of Cs-137(+) ions. This result indicates that Cs-137-complexes with organic materials of tea are much sorbed than Cs-137(+) ions on the silty clay soil. The migration of Cs-137 extracted from the tea in the silty clay soil has been studied under a steady how of tea-extract by using a soil zone apparatus. The Cs-137 concentrations contained in both effluent fractions and in soil samples were measured using a HPGe detector. The distribution patterns of Cs-137 in the layers of the soil zone were obtained as one- and two-dimensional. The migration of Cs-137 extracted from the tea in soil is mainly influenced by how. The results indicate that the migration of Cs-137-complexes with organic materials and Cs-137 adsorbed fine silts cannot be described by such a K-d based on ion-exchange reactions, but it is important to consider the moving mechanism of particulates besides ion-exchange reactions.