Properties and mechanism for selective adsorption of Au(iii) on an ionic liquid adsorbent by grafting N-methyl imidazole onto chloromethylated polystyrene beads.

ABSTRACT: To recover Au(iii) from an acidic chloride-containing solution efficiently, an ionic liquid absorbent (CMPS-IL) was synthesized by grafting N-methyl imidazole onto chloromethylated polystyrene beads (CMPS). The adsorption capacity, selectivity, and reusability were systematically evaluated by a series of adsorption experiments. The maximum adsorption capacity reached up to 516.5 mg g^-1 at 318 K. The adsorbent can selectively recover Au(iii) from binary system solutions with a higher separation factor β _Au/M (10⁴-10⁶). Moreover, the adsorption-desorption cycles (7 cycles) showed that the CMPS-IL maintained a stable adsorption performance and high adsorption efficiency. Finally, the adsorption mechanism of CMPS-IL for Au(iii) was inve

SUBMITTER: Kou X 

PROVIDER: S-EPMC9054204 | biostudies-literature | 2020 May

REPOSITORIES: biostudies-literature