Abstract
Green liquid emulsion membrane (LEM) wasdeveloped for separation of zirconium and hafnium from nitric acid medium. Themembrane is based on the use of CYANEX-272 diluted with corn oil (greendiluent) as a carrier, span 80 as a surfactant and citric acid as a strippingagent. The factors affecting the stability of the LEM were investigated underchosen conditions. The parameters affecting the permeation of Zr and Hf fromnitrate medium were also studied. The metal ion content in the inner phaseobtained by demulsifying the loaded CC-LEM using the freeze-thaw method is 22.8g/l Zr and 2.05 mg/l Hf i.e. the contamination of the recovered Zr is 89.91 mgHf/ kg Zr which is below the limit for the use of zirconium in nuclearapplications.
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