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Title: A simple primary amide for the selective recovery of gold from secondary resources

Journal Article · · Angewandte Chemie (International Edition)

Waste electrical and electronic equipment (WEEE) such as mobile phones contains a plethora of metals of which gold is by far the most valuable. Herein a simple primary amide is described that achieves the selective separation of gold from a mixture of metals typically found in mobile phones by extraction into toluene from an aqueous HCl solution; unlike current processes, reverse phase transfer is achieved simply using water. Phase transfer occurs by dynamic assembly of protonated and neutral amides with [AuCl4]– ions through hydrogen bonding in the organic phase, as shown by EXAFS, mass spectrometry measurements, and computational calculations, and supported by distribution coefficient analysis. In conclusion, the fundamental chemical understanding gained herein should be integral to the development of metal-recovery processes, in particular through the use of dynamic assembly processes to build complexity from simplicity.

Research Organization:
Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)
Sponsoring Organization:
USDOE Office of Science (SC)
Grant/Contract Number:
AC05-00OR22725
OSTI ID:
1326545
Journal Information:
Angewandte Chemie (International Edition), Vol. 55, Issue 40; ISSN 1433-7851
Publisher:
WileyCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 85 works
Citation information provided by
Web of Science

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Pyridinethiol-Assisted Dissolution of Elemental Gold in Organic Solutions journal November 2018
Gold Recycling at Laboratory Scale: From Nanowaste to Nanospheres journal October 2019
Bio-inspired nano-traps for uranium extraction from seawater and recovery from nuclear waste journal April 2018
In situ electrochemical dissolution of platinum and gold in organic-based solvent journal March 2018
The development of unimolecular conjugated polymeric micelles for the highly selective detection and recovery of gold from electronic waste journal January 2019
Facile and green synthesis of highly fluorescent nitrogen-doped carbon dots from jackfruit seeds and its applications towards the fluorimetric detection of Au 3+ ions in aqueous medium and in in vitro multicolor cell imaging journal January 2019
Challenges and opportunities in the recovery of gold from electronic waste journal January 2020
Environmentally benign, facile and selective recovery of gold from aqueous media: synergic role of carbon dots as green reductant and sensor towards Au 3+ ions journal January 2019
Rapid capture of trace precious metals by amyloid-like protein membrane with high adsorption capacity and selectivity journal January 2020
A chlorine-free protocol for processing germanium journal May 2017
Pyridinethiol-Assisted Dissolution of Elemental Gold in Organic Solutions journal November 2018
Selective Recovery of Gold from Electronic Waste Using 3D-Printed Scavenger journal October 2017
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