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T. Igarashi, Y. Mahara, N. Ashikawa, M. Okamura
Evaluation of radioactive nickel distribution coefficient by analyzing background stable nickel
A simple method of evaluating the distribution coefficient (Kd) of radioactive Ni was examined. The method is based on the measurement of the solid-liquid concentration distribution ratio (fd) of background stable Ni. To verify the method, the Kd´s of both the radioactive Ni and stable Ni were simultaneously measured by using three different samples through batch sorption experiments in which radioactive Ni with a constant concentration and stable Ni with various concentrations coexisted. The fd of background stable Ni was then measured by extraction with 0.1 N CH3COONH4 and 0.1 N HCl solutions to compare fd with Kd. The results showed that the Kd´s of radioactive Ni agreed with those of stable Ni, and that the fd corresponded to the Kd when the liquid-phase concentration of stable Ni approached the background level. This indicates that the method of evaluating Kd by using fd is applicable to Ni within the experiment.
Radiochimica Acta, Oldenbourg Wissenschaftsverlag
Print ISSN: 0033-8230
Volume: 88, 09/2000
Pages: 695