Abstract

The recovery of rhenium from waste acid is an urgent issue due to low rhenium concentration and high sulfuric acidity. To solve the problem, novel coated solvent-impregnated resins consisting of inert resins LS-300, Alamine 304-1 and the PVA film (304-CSIRs) were prepared for the separation of Re(VII) from high sulfuric acid solutions. It was shown that the PVA film coated completely on the surfaces of LS-300 resins with a thickness of 5 μm, and Alamine 304-1 distributed completely inside the porous of LS-300 resins. The adsorption fitted well with Langmuir model and pseudo-second-order model with the saturation adsorption capacity of 139.40 mg·g−1. The maximum separation factor of Re(VII) versus Cu (II) was up to 483, and 304-CSIRs had no adsorptions for As(V). The adsorption capacity of Re(VII) onto 304-CSIRs maintained in 97.79% at the fifth adsorption–desorption cycle. 99.87% of rhenium was recovered by 304-CSIRs from waste acid generated from a copper smelter.

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