Use of electrical conductivity to estimate effects of competing ions on radionuclide distribution coefficients |
| |
Authors: | H Yasuda |
| |
Institution: | 1. Division of Radioecology, National Institute of Radiological Sciences, 3609, Isozaki, Nakaminato-shi, 311-12, Ibaraki, Japan
|
| |
Abstract: | The distribution coefficient (K d) between the soil solid phase and the liquid phase is a commonly used parameter to evaluate radionuclide behavior in soil. For reliable evaluation, the variability of the K ddue to changes of environmental conditions should be clarified. In the present study, applicability of electrical conductivity (EC) to estimate effects of competing ions on K dwas examined in batch experiments. The K dof five radionuclides (60Co, 54Mn, 85Sr, 137Cs, 65Zn) were found to be in inverse proportion to the supernatant EC. The K dof 60Co and 54Mn were increasing at 7 days and no stable K dcould be determined. For 85Sr, 137Cs, and 63Zn, the regression equations obtained between the K dof the equilibrium state and the supernatant EC were validated in another experiment; it is expected that their K ds can be determined accurately using the EC. Because of its simplicity in measurements, using EC should be very practical for estimating effects of competing ions on K dof selected radionuclides. |
| |
Keywords: | |
本文献已被 SpringerLink 等数据库收录! |
|