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Abstract The aggregation behavior of various acid extractants in the solvent extraction systems of metal ions is re-examined andexplained according to knowledge obtained in recent work. The conclusions are as follows. (1) Complexes formed by the extractants andmetal ions can form reversed micelles in organic diluents, depending on the microstructures of the complexes. The dimers of the acid ex-tractant cannot percolate to the metal-extractant aggregates, and the acid-salt complexes are always formed in the aggregates. The reversedmicelles or the W/O microemulsions formed by different species cannot be associated with each other to form a unified aggregate. (2) Insolvent extraction system, hydration of the extractants and metal ions can be considered as the driving force of forming reversed micelles.(3) Information of the first approach to the insight of the bicontinuous microemulsion of NaDEHP shows that various components in theaqueous phase behave confined and very similar to the typical AOT/n-heptane
Abstract The aggregation behavior of various acid extractants in the solvent extraction systems of metal ions is re-observed andexplained according to knowledge obtained in recent work. Theses are as follows. (1) Complexes formed by the extractants andmetal ions can substituted organic diluents, depending on the microstructures of the complexes. The dimers of the acid ex-tractant can not percolate to the metal-extractant aggregates, and the acid-salt complexes are always formed in the aggregates. The dimers of the acid ex-tractant can not percolate to the metal- (2) Insolvent extraction system, hydration of the extractants and metal ions can be considered as driving force of pronged micons (3) Information of the first approach to the insight of the bicontinuous microemulsion of NaDEHP shows that various components in the aqueous phase behaved confined and very similar to the typ ical AOT / n-heptane