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Efficient and selective gold recovery from e-waste by imidazolium-based poly(ionic liquid)s.
- Source :
-
Separation & Purification Technology . Jan2024, Vol. 328, pN.PAG-N.PAG. 1p. - Publication Year :
- 2024
-
Abstract
- [Display omitted] • The low-cost and acid-stable PILs were designed to recover gold from e-waste. • The PILs exhibited excellent adsorption capacity and rapid equilibrium time. • The PILs achieved remarkable selectivity to Au(III) in actual CPUs leachate. • A satisfactory reusability of more than 8 cycles was realized. • An economical and feasible flow chart of gold recovery from e-waste was provided. Recycling gold from e-waste is not only beneficial to environmental protection, but also to resource sustainability. However, it remains a great challenge due to the limitations of high cost, lengthy balance process and the interference of coexisting metals. Herein, a family of low-cost, nitrogen-rich content and acid-stable imidazolium-based poly(ionic liquid)s, designated as P(nDVB-mVBIMCl)s, were synthesized for recovery of gold from e-waste. The obtained P(2DVB-8VBIMCl)s achieves outstanding adsorption capacity (820.5 mg·g−1) and rapid equilibrium time (15 min) and satisfactory reusability (more than 8 cycles). XPS, EDS and ion chromatography revealed that the excellent adsorption performance was attributed to synergistic effect of ion exchange and chemical reduction. In addition, the P(2DVB-8VBIMCl)s showed excellent selectivity for gold in actual e-waste leaching solution, exhibited satisfactory selectivity coefficient for Fe3+ (1.46 × 104) and Ni2+ (1.12 × 104), obtaining 23.4 karat high-purity gold after calcination. In addition, the P(2DVB-8VBIMCl)s shows its good economic feasibility. Overall, this work provides a feasible adsorbent, which becomes a promising candidate for industrial gold recovery from e-waste. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 13835866
- Volume :
- 328
- Database :
- Academic Search Index
- Journal :
- Separation & Purification Technology
- Publication Type :
- Academic Journal
- Accession number :
- 173458289
- Full Text :
- https://doi.org/10.1016/j.seppur.2023.125049