Adsorption of Re(VII) from sulfuric acid solutions by coated impregnated resins containing TBP

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.

KEYWORDS:

• Re(VII)
• Coated solvent impregnated resins
• TBP
• Adsorption

Additional information

Funding

This work was supported by the National Natural Science Foundation of China [51604303];Hunan Natural Science Fund for Distinguished Young Scholar [2019JJ20031];Fundamental Research Funds for the Central Universities of Central South University [2019zzts243];