The interfacial kinetics,micellization and interfacial characteristics of the synergetic extrac- tion system,D_2EHPA-H_2RPA-Al~(3+),have been studied.H_2RPA is a single long chain alkyl phosphate.We have found that H_2RPA in the mixed extractant system strongly exhibits the characteristics of micellization and interfacial activity.As the concentration of D_2EHPA in- creases,the micellization and interracial activity of H_2RPA decrease.The interfacial adsorption behaviour of H_2RPA is opposite to that of D_2EHPA.It was proved that the kine- tics of non-micella mixed extraction system was controlled by the chemical reaction at inter- face,and the reaction rate equation was obtained.This non-micella mixed extraction system is expected to be used in the future.
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