Show simple item record

dc.contributor.advisorRaghavan, Srinien_US
dc.contributor.authorAtluri, Vasudeva Prasad, 1959-en_US
dc.creatorAtluri, Vasudeva Prasad, 1959-en_US
dc.date.accessioned2013-03-28T10:09:27Zen
dc.date.available2013-03-28T10:09:27Zen
dc.date.issued1987en_US
dc.identifier.urihttp://hdl.handle.net/10150/276566en
dc.description.abstractThis research was undertaken to study the suitable physico-chemical conditions for the selective recovery of gold and silver from simulated thiosulfate leach liquors containing copper, gold or silver, ammonia and thiosulfate using three anion exchange resins. In particular, the effect of chemical variables such as thiosulfate, cupric ion and ammonia concentrations and the solution potential of the system on the batch loading of silver and gold onto the resins have been investigated in detail. Pourbaix diagrams have been constructed to understand the stability of this complex system under various Eh and pH conditions. The experimental results indicate that IRA-400 resin has the highest capacity for both silver and gold compared to IRA-68 and IRA-94. All the three resins investigated are not selective to silver and gold over copper. The elution studies using ammonium thiosulfate solutions have revealed that selective elution of silver from copper is not possible, while some selectivity can be achieved between gold and copper. (Abstract shortened with permission of author.)
dc.language.isoen_USen_US
dc.publisherThe University of Arizona.en_US
dc.rightsCopyright © is held by the author. Digital access to this material is made possible by the University Libraries, University of Arizona. Further transmission, reproduction or presentation (such as public display or performance) of protected items is prohibited except with permission of the author.en_US
dc.subjectGold -- Refining.en_US
dc.subjectSilver -- Refining.en_US
dc.subjectCopper -- Refining.en_US
dc.titleRecovery of gold and silver from ammoniacal thiosulfate solutions containing copper by resin ion exchange methoden_US
dc.typetexten_US
dc.typeThesis-Reproduction (electronic)en_US
dc.identifier.oclc19503200en_US
thesis.degree.grantorUniversity of Arizonaen_US
thesis.degree.levelmastersen_US
dc.identifier.proquest1332409en_US
thesis.degree.disciplineGraduate Collegeen_US
thesis.degree.disciplineMaterials Science and Engineeringen_US
thesis.degree.nameM.S.en_US
dc.identifier.bibrecord.b16785125en_US
refterms.dateFOA2018-06-18T09:13:33Z
html.description.abstractThis research was undertaken to study the suitable physico-chemical conditions for the selective recovery of gold and silver from simulated thiosulfate leach liquors containing copper, gold or silver, ammonia and thiosulfate using three anion exchange resins. In particular, the effect of chemical variables such as thiosulfate, cupric ion and ammonia concentrations and the solution potential of the system on the batch loading of silver and gold onto the resins have been investigated in detail. Pourbaix diagrams have been constructed to understand the stability of this complex system under various Eh and pH conditions. The experimental results indicate that IRA-400 resin has the highest capacity for both silver and gold compared to IRA-68 and IRA-94. All the three resins investigated are not selective to silver and gold over copper. The elution studies using ammonium thiosulfate solutions have revealed that selective elution of silver from copper is not possible, while some selectivity can be achieved between gold and copper. (Abstract shortened with permission of author.)


Files in this item

Thumbnail
Name:
azu_td_1332409_sip1_w.pdf
Size:
5.684Mb
Format:
PDF

This item appears in the following Collection(s)

Show simple item record