The adsorption of gold, palladium and platinum from acidic chloride solutions on mesoporous carbons.
Studies on the adsorption characteristics of gold, palladium and platinum on mesoporous carbon (CMK-3) and sulfur-impregnated mesoporous carbon (CMK-3/S) evaluated the benefits/drawbacks of the presence of a layer of elemental sulfur inside mesoporous carbon structures. Adsorption isotherms collected for Au(III), Pd(II) and Pt(IV) on those materials suggest that sulfur does enhance the adsorption of those metal ions in mildly acidic environment (pH 3). The isotherms collected in 1 M HCl show that the benefit of sulfur disappears due to the competing influence of large concentration of hydrogen ions on the ion-exchanging mechanism of metal ions sorption on mesoporous carbon surfaces. The collected acid dependencies illustrate similar adsorption characteristics for CMK-3 and CMK-3/S in 1-5 M HCl concentration range. Sorption of metal ions from diluted aqueous acidic mixtures of actual leached electronic waste demonstrated the feasibility of recovery of gold from such liquors.
- Publication Date:
- OSTI Identifier:
- Report Number(s):
Journal ID: ISSN 0736-6299
- Grant/Contract Number:
- Accepted Manuscript
- Journal Name:
- Solvent Extraction and Ion Exchange
- Additional Journal Information:
- Journal Volume: 32; Journal Issue: 7; Journal ID: ISSN 0736-6299
- Taylor and Francis
- Research Org:
- Idaho National Laboratory (INL), Idaho Falls, ID (United States)
- Sponsoring Org:
- Country of Publication:
- United States
- 37 INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY electronic scrap; gold; mesoporous carbons; palladium; precious metals recovery
Enter terms in the toolbar above to search the full text of this document for pages containing specific keywords.