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Erschienen in: Cellulose 17/2020

01.10.2020 | Original Research

Control of the separation order of Au(III), Pd(II), and Pt(IV) achieved by site-controllable carboxyl-functionalized diethylaminoethyl celluloses

verfasst von: Wanghuan Guo, Zhigang Zhao, Fan Yang, Meiying Xie, Zhiheng Shao, Liyan Xue, Yang Zhang, Wanqing Lin, Chang Du, Yongjian Zhang

Erschienen in: Cellulose | Ausgabe 17/2020

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Abstract

The separation and recovery of Au(III), Pd(II), and Pt(IV) is a challenge in hydrometallurgy, and finding good adsorbents is a way to solve this problem. In this work, two novel adsorbents, carboxymethyldiethylammoniumethyl cellulose (CM-n-DEAEC) and carboxymethyl-2-diethylaminoethyl cellulose (CM-o-DEAEC), were synthesized by changing the grafting site of carboxymethyl on diethylaminoethyl cellulose (DEAEC). The structures and morphologies of the adsorbents were examined by NMR, FT-IR, EA, TGA, and SEM analyses. The effects of adsorbents on the separation performance of Au(III), Pd(II), and Pt(IV) at different adsorption conditions were studied. The performances of stripping and recycling were investigated. At a 3 M chloride ion concentration, CM-n-DEAEC's adsorption rates for Pd(II), Au(III), and Pt(IV) were stabilized at 60%, 30%, and 7% in the pH range of 1.0–3.0 and were unaffected by coexisting metal ions. However, at a 0.1 M chloride ion concentration, CM-o-DEAEC separated Pt(IV) before Au(III) and Pd(II) in the pH range from 1.0 to 2.0 without being affected by coexisting metal ions. In addition, the absorbed metal ions can be easily stripped by a 0.1 M thiourea-0.1 M HCl solution, and the adsorption rate only decreased by 3.0% and 1.8% after seven adsorption–desorption cycles. Therefore, it was shown that CM-n-DEAEC and CM-o-DEAEC are excellent adsorbents that can control the adsorption order of precious metals and can selectively and quickly recover Pd(II) or Pt(IV) from wastes containing Au(III).

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Literatur
Zurück zum Zitat Yi Q, Fan R, Xie F, Min H, Zhang Q, Luo Z (2016) Selective recovery of Au(III) and Pd(II) from waste PCBs using ethylenediamine modified persimmon tannin adsorbent. In: Li J, Dong F (eds) Selected proceedings of the tenth international conference on waste management and technology, vol 31. Procedia environmental sciences. pp 185–194. https://doi.org/10.1016/j.proenv.2016.02.025 Yi Q, Fan R, Xie F, Min H, Zhang Q, Luo Z (2016) Selective recovery of Au(III) and Pd(II) from waste PCBs using ethylenediamine modified persimmon tannin adsorbent. In: Li J, Dong F (eds) Selected proceedings of the tenth international conference on waste management and technology, vol 31. Procedia environmental sciences. pp 185–194. https://​doi.​org/​10.​1016/​j.​proenv.​2016.​02.​025
Metadaten
Titel
Control of the separation order of Au(III), Pd(II), and Pt(IV) achieved by site-controllable carboxyl-functionalized diethylaminoethyl celluloses
verfasst von
Wanghuan Guo
Zhigang Zhao
Fan Yang
Meiying Xie
Zhiheng Shao
Liyan Xue
Yang Zhang
Wanqing Lin
Chang Du
Yongjian Zhang
Publikationsdatum
01.10.2020
Verlag
Springer Netherlands
Erschienen in
Cellulose / Ausgabe 17/2020
Print ISSN: 0969-0239
Elektronische ISSN: 1572-882X
DOI
https://doi.org/10.1007/s10570-020-03472-4

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