The Radiolytic Oxidation and Reduction of Plutonium
It has been shown on several occasions that all other things being equal, the rate of migration of plutonium through an aquifer is greatly influenced by its oxidation state. It is a reasonable expectation that other actinides exhibiting multiple oxidation states will behave similarly. By and large the more highly charged ions in solution move through rock strata more slowly than those of lesser charge. Thus from comparative experiments on the relative migration rates of Pu(IV) and Pu(III) we would expect Pu(III) to move about 10 times faster than Pu(IV)* and it has been shown Pu02+ moves about 250 times more rapidly than Pu(IV) (1).
KeywordsAlpha Activity Rock Stratum Pseudo First Order Reaction Waste Isolation Pilot Plant Multiple Oxidation State
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