Environmentally friendly Pd(II) recovery from spent automotive catalysts using resins impregnated with a pincer-type extractant.

ABSTRACT: Extractant-impregnated resins have potential for recovering platinum group metals selectively and efficiently. Herein, 1,3-bis(2-(octylthio)propan-2-yl)benzene (1), a pincer-type extractant, was impregnated in Amberlite XAD-7 resin (1-EIR), and the batch Pd(II) sorption conditions, including impregnated amount, shaking time, Pd(II) concentration, HCl concentration, and Pd(II) desorption reagents, were optimized. The maximum Pd(II) sorption capacity of 1-EIR was 49 mg g^-1 after 24 h in a 700 ppm Pd(II) solution. Over 20 adsorption-desorption cycles, 1-EIR showed good reusability, with a sorption percentage (S%) of > 92%. However, not all Pd(II) was desorbed from 1-EIR. Complete Pd(II) collection was achieved by combining desorption with flaking of the Pd-extractant complex from P

SUBMITTER: Yamada M 

PROVIDER: S-EPMC7801578 | biostudies-literature | 2021 Jan

REPOSITORIES: biostudies-literature