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Investigation towards controlled precipitation of nickel using H2S(g) by harnessing pH dependent sulphide speciation
Includes bibliographical references (leaves 109-114).
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| Main Author: | |
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| Other Authors: | |
| Format: | Thesis |
| Language: | English |
| Published: |
Department of Chemical Engineering
2014
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| _version_ | 1867613217880014848 |
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| access_status_str | Open Access |
| author | Karbanee, Nazneen |
| author2 | Lewis, Alison Emslie |
| author_browse | Karbanee, Nazneen Lewis, Alison Emslie |
| author_facet | Lewis, Alison Emslie Karbanee, Nazneen |
| author_sort | Karbanee, Nazneen |
| collection | Thesis |
| description | Includes bibliographical references (leaves 109-114). |
| format | Thesis |
| id | oai:open.uct.ac.za:11427/5308 |
| institution | University of Cape Town (South Africa) |
| language | eng |
| last_indexed | 2026-06-10T12:32:38.580Z |
| license_str | Not specified — see source repository |
| provenance_str_mv | Harvested via OAI-PMH from UCTD — University of Cape Town Open Access Repository |
| publishDate | 2014 |
| publishDateRange | 2014 |
| publishDateSort | 2014 |
| publisher | Department of Chemical Engineering |
| publisherStr | Department of Chemical Engineering |
| record_format | dspace |
| source_str | UCTD — University of Cape Town Open Access Repository |
| spelling | oai:open.uct.ac.za:11427/5308 Investigation towards controlled precipitation of nickel using H2S(g) by harnessing pH dependent sulphide speciation Karbanee, Nazneen Lewis, Alison Emslie Van Hille, Rob Biomedical Engineering Includes bibliographical references (leaves 109-114). 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. 2014-07-31T11:09:09Z 2014-07-31T11:09:09Z 2007 Master Thesis Masters MSc http://hdl.handle.net/11427/5308 eng application/pdf Department of Chemical Engineering Faculty of Engineering and the Built Environment University of Cape Town |
| spellingShingle | Biomedical Engineering Karbanee, Nazneen Investigation towards controlled precipitation of nickel using H2S(g) by harnessing pH dependent sulphide speciation |
| thesis_degree_str | Master's |
| title | Investigation towards controlled precipitation of nickel using H2S(g) by harnessing pH dependent sulphide speciation |
| title_full | Investigation towards controlled precipitation of nickel using H2S(g) by harnessing pH dependent sulphide speciation |
| title_fullStr | Investigation towards controlled precipitation of nickel using H2S(g) by harnessing pH dependent sulphide speciation |
| title_full_unstemmed | Investigation towards controlled precipitation of nickel using H2S(g) by harnessing pH dependent sulphide speciation |
| title_short | Investigation towards controlled precipitation of nickel using H2S(g) by harnessing pH dependent sulphide speciation |
| title_sort | investigation towards controlled precipitation of nickel using h2s g by harnessing ph dependent sulphide speciation |
| topic | Biomedical Engineering |
| url | http://hdl.handle.net/11427/5308 |
| work_keys_str_mv | AT karbaneenazneen investigationtowardscontrolledprecipitationofnickelusingh2sgbyharnessingphdependentsulphidespeciation |