Publication:
Electrochemical Recovery of Gold from Waste Electric and Electronic Equipment Using Circulating Particulate Bed Reactor (CPBE)

Simple item page
cris.author.scopus-author-id 57194833892
cris.author.scopus-author-id 57195513638
cris.author.scopus-author-id 57224170122
cris.author.scopus-author-id 23767004300
cris.author.scopus-author-id 56442254700
dc.contributor.author Ravinder T.
dc.contributor.author Ali U.F.M.
dc.contributor.author Ridwan F.M.
dc.contributor.author Ibrahim N.
dc.contributor.author Azmi N.H.
dc.date.accessioned 2025-01-13T09:36:16Z
dc.date.available 2025-01-13T09:36:16Z
dc.date.issued 2017-06-21
dc.description.abstract The utilization of electrochemical process recovery involving low reactant concentrations of metal requires electrodes with high mass transport rates and specific surface areas. This is essential to increase cross-sectional current densities whilst optimizing the capital and operating costs. Experimental results demonstrated that Circulating Particulate Bed Reactor (CPBE) is suitable for the recovery of low concentrations of gold from aqueous chloride solution containing AuCl4- and AuCl2- of less than 0.5 mol m-3(< 102 g m-3). Elemental gold was successfully obtained on 0.5-1 mm gr particles in an electrochemical reactor incorporating a cation-permeable membrane and operated in bath recycle mode. Depletion to concentration < 5 x 10-3 mol m-3 (< 1 g m-3) appeared to be mass transport controlled at an applied potential of +0.20 V (SCE), specific electrical energy consumption (SEEC) of ca. 800-1300 kWh h (tonne Au)-1 for cell voltages (U) of 2.0-3.0 V, and fractional current efficiencies of ca. 0.95. However, atomic absorption and UV spectrophotometry established that as the ([AuCl4-+ [AuCl2-]) concentration decayed, the [AuCl4-]:[ AuCl2-] molar ratio changed. A multistep mechanism for reduction of AuCl4- ions explained this behavior in terms of changing overpotentials for AuCl4- and AuCl2- reduction as total dissolved gold concentration decreased. In addition, SEM images confirmed that adherent and coherent Au deposits were achieved with CPBE for Au deposition under mass transport control at 0.20 V (SCE).
dc.identifier.doi 10.1088/1757-899X/206/1/012093
dc.identifier.scopus 2-s2.0-85023204943
dc.identifier.uri https://hdl.handle.net/20.500.14170/12399
dc.relation.grantno undefined
dc.relation.ispartof IOP Conference Series: Materials Science and Engineering
dc.relation.ispartofseries IOP Conference Series: Materials Science and Engineering
dc.relation.issn 17578981
dc.rights open access
dc.title Electrochemical Recovery of Gold from Waste Electric and Electronic Equipment Using Circulating Particulate Bed Reactor (CPBE)
dc.type Conference Proceeding
dspace.entity.type Publication
oaire.citation.issue 1
oaire.citation.volume 206
oairecerif.affiliation.orgunit Universiti Malaysia Perlis
oairecerif.affiliation.orgunit Universiti Malaysia Perlis
oairecerif.affiliation.orgunit Universiti Malaysia Perlis
oairecerif.affiliation.orgunit Universiti Malaysia Perlis
oairecerif.affiliation.orgunit Universiti Malaysia Perlis
oairecerif.citation.number 012093
person.identifier.orcid #PLACEHOLDER_PARENT_METADATA_VALUE#
person.identifier.orcid #PLACEHOLDER_PARENT_METADATA_VALUE#
person.identifier.orcid #PLACEHOLDER_PARENT_METADATA_VALUE#
person.identifier.orcid #PLACEHOLDER_PARENT_METADATA_VALUE#
person.identifier.orcid #PLACEHOLDER_PARENT_METADATA_VALUE#
person.identifier.scopus-author-id 57194833892
person.identifier.scopus-author-id 57195513638
person.identifier.scopus-author-id 57224170122
person.identifier.scopus-author-id 23767004300
person.identifier.scopus-author-id 56442254700
Files
Collections
Publications 2017