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Reversed-micellar extraction of strontium(II) from model solutions of seawater

Naganawa, Hirochika  ; Suzuki, Hideya*; Yanase, Nobuyuki; Nagano, Tetsushi  ; Noro, Junji*

In order to monitor a radioactive nuclide of strontium-90 in seawater around nuclear facilities, a solvent extraction method for collecting Sr(II) in seawater was examined. A reversed-micellar extraction system containing an anionic surfactant AOT and a molecular extractant TODGA in n-hexane was chosen for the extraction of Sr(II) from model solutions of seawater containing 0.5 M NaCl (1 M = 1 mol dm$$^{-3}$$), 0.05 M MgCl$$_{2}$$, and/or 0.01 M CaCl$$_{2}$$. The combination of AOT forming reversed micelles and TODGA coordinating with Sr(II) as an organic ligand (extractant) was found to be efficient for the extraction of Sr(II) from the model solutions. The mechanism of the reversed-micellar extraction system was also discussed in the present study.

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Category:Chemistry, Analytical

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