Gold and palladium adsorption from leached electronic scrap using ordered mesoporous carbon nanoscaffolds
Ordered mesoporous carbon (OMC) nanoscaffolds are engineered agglomerates of carbon nanotubes held together by small carbon nanofibers with uniform pore sizes, high pore volume, and high channel permeability. These materials exhibit very high affinity for the adsorption of gold from aqueous acidic mixtures. The efficiency of gold recovery is comparable to those typically accomplished using biopolymer-based adsorbents. The adsorption efficiency for other precious metals such as palladium and platinum is lower. Studies on the precious metal (Au, Pd) adsorption on OMC materials from actual liquors of leached electronics will be presented. Adsorption properties will be compared for several different sorbents used for the recovery of precious metals. The leach liquor compositions for three different types of electronic scrap materials (personal computer board, cell phone and tv input/output board) will be presented. The sorption efficiencies for Au, Pd, together with a spectrum of competing and non-competing metals, from such leach mixtures will be compared.
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- Conference: International Solvent Extraction Conference (ISEC 2014), Wurzburg (Germany), 7-11 Sep 2014
- Research Org:
- Idaho National Laboratory (INL), Idaho Falls, ID (United States)
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- United States
- 37 INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY; 32 ENERGY CONSERVATION, CONSUMPTION, AND UTILIZATION; PALLADIUM; GOLD; CARBON NANOTUBES; PLATINUM; ADSORPTION; MATERIALS RECOVERY; LEACHING; SCRAP; COMPARATIVE EVALUATIONS; ELECTRONIC EQUIPMENT; EFFICIENCY; MIXTURES adsorption; electronic scrap; electronic waste; mesoporous carbons; precious metals recovery
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