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Beneficiation of diamond mine residues for the synthesis of Mg containing compounds
Thesis (PhD (Chemistry))--University of Pretoria, 2023.
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| Format: | Thesis |
| Language: | English |
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University of Pretoria
2023
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| _version_ | 1867613503947276288 |
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| access_status_str | Open Access |
| author2 | Van der Merwe, Liesel Laura |
| author_browse | Van der Merwe, Liesel Laura |
| author_facet | Van der Merwe, Liesel Laura |
| collection | Thesis |
| dc_rights_str_mv | © 2023 University of Pretoria. All rights reserved. The copyright in this work vests in the University of Pretoria. No part of this work may be reproduced or transmitted in any form or by any means, without the prior written permission of the University of Pretoria. |
| description | Thesis (PhD (Chemistry))--University of Pretoria, 2023. |
| format | Thesis |
| id | oai:repository.up.ac.za:2263/91392 |
| institution | University of Pretoria (South Africa) |
| language | English |
| last_indexed | 2026-06-10T12:37:11.641Z |
| license_str | Other — see source repository |
| provenance_str_mv | Harvested via OAI-PMH from UPSpace — University of Pretoria Institutional Repository |
| publishDate | 2023 |
| publishDateRange | 2023 |
| publishDateSort | 2023 |
| publisher | University of Pretoria |
| publisherStr | University of Pretoria |
| record_format | dspace |
| source_str | UPSpace — University of Pretoria Institutional Repository |
| spelling | oai:repository.up.ac.za:2263/91392 Beneficiation of diamond mine residues for the synthesis of Mg containing compounds Van der Merwe, Liesel Laura barbara.castleman@up.ac.za Doucet, Frédéric Castleman, Barbara Ann Chemistry Waste beneficiation Thermochemical treatment Mine tailings Metal extraction UCTD Thesis (PhD (Chemistry))--University of Pretoria, 2023. The aim of this study is to develop a process for the valorisation of diamond mine residues. This entailed a combination of thermochemical solid-solid reactions between the mine residues and ammonium sulphate, followed by aqueous dissolution, to maximise the extraction of strategic metals from various mineral-bearing materials. The thermochemical treatment of the mine residues with ammonium sulphate was found to be non-selective. Subsequently, thermogravimetric analysis data of the obtained products was used to develop a roasting programme allowing Fe to be separated from Mg before leaching. Brucite and Mg/Al layered double hydroxides were successfully synthesised from the leachates after elemental extraction and separation. The talc content of the leach residue could be increased substantially, accompanied by an improvement in colour clarity. This study successfully proved the formation of Mg containing products during the beneficiation of diamond mine residues. National Research Foundation of South Africa: NRF Thuthuka Grant 117944 NRF Competitive Programme for Rated Researchers Grant 138020 University of Pretoria Chemistry PhD (Chemistry) Unrestricted 2023-07-13T07:59:34Z 2023-07-13T07:59:34Z 2023 2023 Dissertation * S2023 http://hdl.handle.net/2263/91392 en © 2023 University of Pretoria. All rights reserved. The copyright in this work vests in the University of Pretoria. No part of this work may be reproduced or transmitted in any form or by any means, without the prior written permission of the University of Pretoria. application/pdf University of Pretoria |
| spellingShingle | Chemistry Waste beneficiation Thermochemical treatment Mine tailings Metal extraction UCTD Beneficiation of diamond mine residues for the synthesis of Mg containing compounds |
| title | Beneficiation of diamond mine residues for the synthesis of Mg containing compounds |
| title_full | Beneficiation of diamond mine residues for the synthesis of Mg containing compounds |
| title_fullStr | Beneficiation of diamond mine residues for the synthesis of Mg containing compounds |
| title_full_unstemmed | Beneficiation of diamond mine residues for the synthesis of Mg containing compounds |
| title_short | Beneficiation of diamond mine residues for the synthesis of Mg containing compounds |
| title_sort | beneficiation of diamond mine residues for the synthesis of mg containing compounds |
| topic | Chemistry Waste beneficiation Thermochemical treatment Mine tailings Metal extraction UCTD |
| url | http://hdl.handle.net/2263/91392 |