Separation and recovery of gallium(III) ions from aqueous phase by liquid--liquid extraction using a novel extractant, Cyphos IL 101

Authors : Sumitra NAYAK, Niharbala DEVI

Pages : 892-903

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Publication Date : 0000-00-00

Article Type : Research Paper

Abstract :The present study describes the extraction behavior of galliuminsert ignore into journalissuearticles values(III); using a novel ionic liquid trihexylinsert ignore into journalissuearticles values(tetradecyl); phosphonium chloride insert ignore into journalissuearticles values(Cyphos IL 101); diluted with kerosene from acidic chloride medium. The extraction of gallium was found to depend on the hydrochloric acid concentration and quantitative extraction of gallium took place at 2.0 mol/L HCl concentration. The nature of the extracted complex in the organic phase was determined using Job`s method and proposed to be [R$_{3}$R$^\prime $PGaCl$_{4}$]. The loading capacity of 5.0 $\times$ 10$^{-3}$ mol/L Cyphos IL 101 was determined to be 320.0 mg/L. Two stages of stripping were required for complete removal of gallium from the loaded organic phase using 0.1 mol/L HCl. From the temperature variation study, the extraction process was found to be endothermic. The separation efficiency of gallium from its associated metal ions such as Alinsert ignore into journalissuearticles values(III);, Feinsert ignore into journalissuearticles values(III);, Zninsert ignore into journalissuearticles values(II);, Cuinsert ignore into journalissuearticles values(II);, and Niinsert ignore into journalissuearticles values(II); was investigated from binary mixtures and in the presence of all these metal ions, which revealed that the extraction of Zninsert ignore into journalissuearticles values(II); and Cuinsert ignore into journalissuearticles values(II); were more preferred to Gainsert ignore into journalissuearticles values(III); while extractions of Alinsert ignore into journalissuearticles values(III); and Niinsert ignore into journalissuearticles values(II); were nil. The potential of the extractant was assessed to recover gallium from photodiodes.
Keywords : Gallium, Cyphos IL 101, extraction, separation