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Title: 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.
Authors:
;
Publication Date:
OSTI Identifier:
1173106
Report Number(s):
INL/CON--14-33038
TRN: US1500144
DOE Contract Number:
AC07-05ID14517
Resource Type:
Conference
Resource Relation:
Conference: International Solvent Extraction Conference (ISEC 2014), Wurzburg (Germany), 7-11 Sep 2014
Research Org:
Idaho National Laboratory (INL), Idaho Falls, ID (United States)
Sponsoring Org:
USDOE
Country of Publication:
United States
Language:
English
Subject:
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