Abstract
Applicability of reverse osmosis to the treatment of radioactive liquid waste was investigated. In previous papers, we showed the ability of reverse osmosis for decontaminating liquid waste which contains ionic radionuclides with chloride ion. When sulfate ion coexists with chloride, logarithms of DFs of one cation are approximately expressed by a linear function of logarithms of SO42-/Cl- ratio.In this paper, we investigate the relation between DFs and concentrations of coexisting ions in multicomponent cation/anion system. As a result of this study, DFs of rations change more seriously with coexisting anions composition than with cations. In the case of anion, these influences are the reverse. Logarithms of DFs of cations and anions are expressed by linear equation with the two variables, logarithmic concentration ratio of univalent/divalent cations and logarithmic concentration ratio of SO42-/Cl-.
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