An integrated approach for the mitigation of acid rock drainage (ARD) associated with pyrrhotite in nickel deposits

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dc.contributor.advisorBecker, Meganen_ZA
dc.contributor.authorChimbganda, Tapiwaen_ZA
dc.date.accessioned2015-10-28T05:32:46Z
dc.date.available2015-10-28T05:32:46Z
dc.date.issued2012en_ZA
dc.description.abstractThis project identified the possibility of manipulating rejection mechanisms in flotation to produce passivated pyrrhotite tailings. Passivation enables surface coating of the sulfide thus inhibiting attack by oxidising agents. Promotion of passivation of pyrrhotite during flotation to produce un-reactive tailings has not been explored to date. Polyethylene polyamines (DETA/TETA), which are already used as depressants in flotation, have been proved to be effective coating agents, significantly reducing the oxidation of pyrrhotite and pyrite in both abiotic and biotic systems. However, passivation by polyethylene polyamines (DETA and TETA) has only been explored on waste rock and pristine pyrrhotite. Furthermore, studies of the mechanism of oxidation of pyrrhotite have observed the formation of a hydrophilic ferric oxyhydroxide layer which enables depression of pyrrhotite during flotation. This layer has been reported in literature to inhibit the further oxidation of the pyrrhotite surface. Thus passivation can also take advantage of the formation of the ferric oxyhydroxide layer to inhibit further oxidation of the mineral.en_ZA
dc.identifier.apacitationChimbganda, T. (2012). <i>An integrated approach for the mitigation of acid rock drainage (ARD) associated with pyrrhotite in nickel deposits</i>. (Thesis). University of Cape Town ,Faculty of Engineering & the Built Environment ,Department of Chemical Engineering. Retrieved from http://hdl.handle.net/11427/14390en_ZA
dc.identifier.chicagocitationChimbganda, Tapiwa. <i>"An integrated approach for the mitigation of acid rock drainage (ARD) associated with pyrrhotite in nickel deposits."</i> Thesis., University of Cape Town ,Faculty of Engineering & the Built Environment ,Department of Chemical Engineering, 2012. http://hdl.handle.net/11427/14390en_ZA
dc.identifier.citationChimbganda, T. 2012. An integrated approach for the mitigation of acid rock drainage (ARD) associated with pyrrhotite in nickel deposits. University of Cape Town.en_ZA
dc.identifier.risTY - Thesis / Dissertation AU - Chimbganda, Tapiwa AB - This project identified the possibility of manipulating rejection mechanisms in flotation to produce passivated pyrrhotite tailings. Passivation enables surface coating of the sulfide thus inhibiting attack by oxidising agents. Promotion of passivation of pyrrhotite during flotation to produce un-reactive tailings has not been explored to date. Polyethylene polyamines (DETA/TETA), which are already used as depressants in flotation, have been proved to be effective coating agents, significantly reducing the oxidation of pyrrhotite and pyrite in both abiotic and biotic systems. However, passivation by polyethylene polyamines (DETA and TETA) has only been explored on waste rock and pristine pyrrhotite. Furthermore, studies of the mechanism of oxidation of pyrrhotite have observed the formation of a hydrophilic ferric oxyhydroxide layer which enables depression of pyrrhotite during flotation. This layer has been reported in literature to inhibit the further oxidation of the pyrrhotite surface. Thus passivation can also take advantage of the formation of the ferric oxyhydroxide layer to inhibit further oxidation of the mineral. DA - 2012 DB - OpenUCT DP - University of Cape Town LK - https://open.uct.ac.za PB - University of Cape Town PY - 2012 T1 - An integrated approach for the mitigation of acid rock drainage (ARD) associated with pyrrhotite in nickel deposits TI - An integrated approach for the mitigation of acid rock drainage (ARD) associated with pyrrhotite in nickel deposits UR - http://hdl.handle.net/11427/14390 ER -en_ZA
dc.identifier.urihttp://hdl.handle.net/11427/14390
dc.identifier.vancouvercitationChimbganda T. An integrated approach for the mitigation of acid rock drainage (ARD) associated with pyrrhotite in nickel deposits. [Thesis]. University of Cape Town ,Faculty of Engineering & the Built Environment ,Department of Chemical Engineering, 2012 [cited yyyy month dd]. Available from: http://hdl.handle.net/11427/14390en_ZA
dc.language.isoengen_ZA
dc.publisher.departmentCentre for Bioprocess Engineering Researchen_ZA
dc.publisher.facultyFaculty of Engineering and the Built Environment
dc.publisher.institutionUniversity of Cape Town
dc.subject.otherBioprocess Engineeringen_ZA
dc.titleAn integrated approach for the mitigation of acid rock drainage (ARD) associated with pyrrhotite in nickel depositsen_ZA
dc.typeMaster Thesis
dc.type.qualificationlevelMasters
dc.type.qualificationnameMSc (Chem Eng)en_ZA
uct.type.filetypeText
uct.type.filetypeImage
uct.type.publicationResearchen_ZA
uct.type.resourceThesisen_ZA
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