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Chemical and mineralogical changes associated with leachate production at Kriel Power Station ash dam
ESKOM is the biggest producer of electricity in Southern Africa and generated 22mt of ash from its coal burning power stations in 1994. Of the 22 mt of ash only 5% was utilized and the rest disposed of in either landfills or ash dams. Various environmental impacts are associated with the disposal of...
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| Format: | Thesis |
| Language: | English |
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Department of Geological Sciences
2024
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| _version_ | 1867613250008383488 |
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| access_status_str | Open Access |
| author | Bezuidenhout, Nico |
| author_browse | Bezuidenhout, Nico |
| author_facet | Bezuidenhout, Nico |
| author_sort | Bezuidenhout, Nico |
| collection | Thesis |
| description | ESKOM is the biggest producer of electricity in Southern Africa and generated 22mt of ash from its coal burning power stations in 1994. Of the 22 mt of ash only 5% was utilized and the rest disposed of in either landfills or ash dams. Various environmental impacts are associated with the disposal of ash including loss of usable land, dust pollution, water pollution and effects on vegetation. Current research into the environmental impact of fly ash disposal has focused on the dissolution of fly ash and the physical and chemical characteristics of unreacted fly ash particles. Few studies have investigated the chemical and mineralogical transformations that occur during the weathering of ash and little is known concerning secondary mineral formation associated with weathered ash from large ash deposits. The objective of this study was to investigate the dissolution characteristics of fly ash particles, the physical and chemical alteration of fly ash in a real weathering environment and the formation of secondary weathering products associated with ash dams. The research was based on a core section that was drilled through the ash dam of Kriel power station, precipitate samples associated with the water that is used to transport the ash to the ash dam and samples of the ash water and leachate. |
| format | Thesis |
| id | oai:open.uct.ac.za:11427/40658 |
| institution | University of Cape Town (South Africa) |
| language | eng |
| last_indexed | 2026-06-10T12:33:08.525Z |
| license_str | Not specified — see source repository |
| provenance_str_mv | Harvested via OAI-PMH from UCTD — University of Cape Town Open Access Repository |
| publishDate | 2024 |
| publishDateRange | 2024 |
| publishDateSort | 2024 |
| publisher | Department of Geological Sciences |
| publisherStr | Department of Geological Sciences |
| record_format | dspace |
| source_str | UCTD — University of Cape Town Open Access Repository |
| spelling | oai:open.uct.ac.za:11427/40658 Chemical and mineralogical changes associated with leachate production at Kriel Power Station ash dam Bezuidenhout, Nico Geological Sciences ESKOM is the biggest producer of electricity in Southern Africa and generated 22mt of ash from its coal burning power stations in 1994. Of the 22 mt of ash only 5% was utilized and the rest disposed of in either landfills or ash dams. Various environmental impacts are associated with the disposal of ash including loss of usable land, dust pollution, water pollution and effects on vegetation. Current research into the environmental impact of fly ash disposal has focused on the dissolution of fly ash and the physical and chemical characteristics of unreacted fly ash particles. Few studies have investigated the chemical and mineralogical transformations that occur during the weathering of ash and little is known concerning secondary mineral formation associated with weathered ash from large ash deposits. The objective of this study was to investigate the dissolution characteristics of fly ash particles, the physical and chemical alteration of fly ash in a real weathering environment and the formation of secondary weathering products associated with ash dams. The research was based on a core section that was drilled through the ash dam of Kriel power station, precipitate samples associated with the water that is used to transport the ash to the ash dam and samples of the ash water and leachate. 2024-10-31T09:52:24Z 2024-10-31T09:52:24Z 1996 2024-07-12T06:15:02Z Thesis / Dissertation Masters MSc http://hdl.handle.net/11427/40658 eng application/pdf Department of Geological Sciences Faculty of Science |
| spellingShingle | Geological Sciences Bezuidenhout, Nico Chemical and mineralogical changes associated with leachate production at Kriel Power Station ash dam |
| thesis_degree_str | Master's |
| title | Chemical and mineralogical changes associated with leachate production at Kriel Power Station ash dam |
| title_full | Chemical and mineralogical changes associated with leachate production at Kriel Power Station ash dam |
| title_fullStr | Chemical and mineralogical changes associated with leachate production at Kriel Power Station ash dam |
| title_full_unstemmed | Chemical and mineralogical changes associated with leachate production at Kriel Power Station ash dam |
| title_short | Chemical and mineralogical changes associated with leachate production at Kriel Power Station ash dam |
| title_sort | chemical and mineralogical changes associated with leachate production at kriel power station ash dam |
| topic | Geological Sciences |
| url | http://hdl.handle.net/11427/40658 |
| work_keys_str_mv | AT bezuidenhoutnico chemicalandmineralogicalchangesassociatedwithleachateproductionatkrielpowerstationashdam |