Investigation towards controlled precipitation of nickel using H2S(g) by harnessing pH dependent sulphide speciation

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dc.contributor.advisorLewis, Alison Emslieen_ZA
dc.contributor.advisorVan Hille, Roben_ZA
dc.contributor.authorKarbanee, Nazneenen_ZA
dc.date.accessioned2014-07-31T11:09:09Z
dc.date.available2014-07-31T11:09:09Z
dc.date.issued2007en_ZA
dc.descriptionIncludes bibliographical references (leaves 109-114).
dc.description.abstractSulphide as a precipitating agent is effective as it facilitates the removal of heavy metals to very low residual concentrations (ppm - ppb levels) over a wide pH range, owing to the low solubilities (Ksp) of metal sulphides. However, previous work on metal sulphide precipitation has highlighted a number of challenges. The low solubilities of metal sulphides in combination with the rapid kinetics of sulphide precipitation leads to rapid, uncontrolled metal sulphide precipitate formation. The extremely high supersaturations result in high rates of nucleation, leading to the formation of particles with undesirable characteristics. In this thesis, to gain insight on the metal sulphide precipitation of nickel and cobalt from the RES, a simplified model system, consisting of a synthetic NiS04 solution with a concentration of 200ppm Ni2+, was utilised to determine the effect of H2S(g) as a precipitating agent.en_ZA
dc.identifier.apacitationKarbanee, N. (2007). <i>Investigation towards controlled precipitation of nickel using H2S(g) by harnessing pH dependent sulphide speciation</i>. (Thesis). University of Cape Town ,Faculty of Engineering & the Built Environment ,Department of Chemical Engineering. Retrieved from http://hdl.handle.net/11427/5308en_ZA
dc.identifier.chicagocitationKarbanee, Nazneen. <i>"Investigation towards controlled precipitation of nickel using H2S(g) by harnessing pH dependent sulphide speciation."</i> Thesis., University of Cape Town ,Faculty of Engineering & the Built Environment ,Department of Chemical Engineering, 2007. http://hdl.handle.net/11427/5308en_ZA
dc.identifier.citationKarbanee, N. 2007. Investigation towards controlled precipitation of nickel using H2S(g) by harnessing pH dependent sulphide speciation. University of Cape Town.en_ZA
dc.identifier.ris TY - Thesis / Dissertation AU - Karbanee, Nazneen AB - Sulphide as a precipitating agent is effective as it facilitates the removal of heavy metals to very low residual concentrations (ppm - ppb levels) over a wide pH range, owing to the low solubilities (Ksp) of metal sulphides. However, previous work on metal sulphide precipitation has highlighted a number of challenges. The low solubilities of metal sulphides in combination with the rapid kinetics of sulphide precipitation leads to rapid, uncontrolled metal sulphide precipitate formation. The extremely high supersaturations result in high rates of nucleation, leading to the formation of particles with undesirable characteristics. In this thesis, to gain insight on the metal sulphide precipitation of nickel and cobalt from the RES, a simplified model system, consisting of a synthetic NiS04 solution with a concentration of 200ppm Ni2+, was utilised to determine the effect of H2S(g) as a precipitating agent. DA - 2007 DB - OpenUCT DP - University of Cape Town LK - https://open.uct.ac.za PB - University of Cape Town PY - 2007 T1 - Investigation towards controlled precipitation of nickel using H2S(g) by harnessing pH dependent sulphide speciation TI - Investigation towards controlled precipitation of nickel using H2S(g) by harnessing pH dependent sulphide speciation UR - http://hdl.handle.net/11427/5308 ER - en_ZA
dc.identifier.urihttp://hdl.handle.net/11427/5308
dc.identifier.vancouvercitationKarbanee N. Investigation towards controlled precipitation of nickel using H2S(g) by harnessing pH dependent sulphide speciation. [Thesis]. University of Cape Town ,Faculty of Engineering & the Built Environment ,Department of Chemical Engineering, 2007 [cited yyyy month dd]. Available from: http://hdl.handle.net/11427/5308en_ZA
dc.language.isoengen_ZA
dc.publisher.departmentDepartment of Chemical Engineeringen_ZA
dc.publisher.facultyFaculty of Engineering and the Built Environment
dc.publisher.institutionUniversity of Cape Town
dc.subject.otherBiomedical Engineeringen_ZA
dc.titleInvestigation towards controlled precipitation of nickel using H2S(g) by harnessing pH dependent sulphide speciationen_ZA
dc.typeMaster Thesis
dc.type.qualificationlevelMasters
dc.type.qualificationnameMScen_ZA
uct.type.filetypeText
uct.type.filetypeImage
uct.type.publicationResearchen_ZA
uct.type.resourceThesisen_ZA
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