Abstract
ABSTRACT The experiments on the adsorption of Re(VII) onto Tributyl phosphate (TBP) coated solvent-impregnated LS-300 resins (TBP-CSIRs) were performed systematically. The optimal TBP concentration for the impregnation was 70%. The adsorption equilibrium reached in 6 h and the saturation adsorption capacity was 24.48 mg/g. The highest separation coefficients of rhenium over copper, iron, zinc, nickel, and arsenic were 93, 412, 348, 72 and 51, respectively. The adsorption capacity maintained in 93.50% after five times recycles. A 97.57% rhenium was recovered from waste acid with TBP-CSIRs, respectively. This study would contribute to the direct recovery of rhenium from waste acid.
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