Control of Surface Chemistry of Gold, Pyrite and Pyrrhotite

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dc.contributor.authorChen, Xianguoen
dc.contributor.committeechairYoon, Roe-Hoanen
dc.contributor.committeememberLuttrell, Gerald H.en
dc.contributor.committeememberAdel, Gregory T.en
dc.contributor.committeememberKarmis, Michael E.en
dc.contributor.departmentMining and Minerals Engineeringen
dc.date.accessioned2014-03-14T20:47:24Zen
dc.date.adate1998-12-14en
dc.date.available2014-03-14T20:47:24Zen
dc.date.issued1997-08-23en
dc.date.rdate1999-12-14en
dc.date.sdate1998-11-04en
dc.description.abstractRemoving pyrite from coal and pyrrhotite from pentlandite play a critical role in coal and nickel production, respectively, to meet the stringent restriction on SO2 emission. The present project investigates first the mechanism of xanthate adsorption on gold using Atomic Force Microscope (AFM), then the depression of pyrite and pyrrhotite using the synthetic polymers developed by Cytec Industries. The results show that for xanthate/gold system, dixanthogen is the only species that renders the surface hydrophobic. Chemisorbed xanthate is observed on the gold surface but is hydrophilic. The synthetic polymers may adsorb on pyrite and pyrrhotite possibly through the hydrophobic interaction between the hydrophobic moiety of the polymer and the mineral surface that has been hydrophobized by collector adsorption. The hydrophilic moieties of the polymer are exposed to the aqueous phase and render the surface hydrophilic.en
dc.description.degreeMaster of Scienceen
dc.identifier.otheretd-110398-115411en
dc.identifier.sourceurlhttp://scholar.lib.vt.edu/theses/available/etd-110398-115411/en
dc.identifier.urihttp://hdl.handle.net/10919/35583en
dc.publisherVirginia Techen
dc.relation.haspart1.PDFen
dc.relation.haspart2.PDFen
dc.relation.haspart3.PDFen
dc.relation.haspart4.PDFen
dc.relation.haspart5.PDFen
dc.rightsIn Copyrighten
dc.rights.urihttp://rightsstatements.org/vocab/InC/1.0/en
dc.subjectsurface chemistryen
dc.subjectgolden
dc.subjectpyriteen
dc.subjectpyrrhotiteen
dc.titleControl of Surface Chemistry of Gold, Pyrite and Pyrrhotiteen
dc.typeThesisen
thesis.degree.disciplineMining and Minerals Engineeringen
thesis.degree.grantorVirginia Polytechnic Institute and State Universityen
thesis.degree.levelmastersen
thesis.degree.nameMaster of Scienceen

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