Removal of arsenic from gold processing circuits by use of novel magnetic nanoparticles
© 2017 Canadian Institute of Mining, Metallurgy and Petroleum Arsenic adversely affects gold mining operations by interfering with the extraction of gold, as well as posing a significant health and environmental hazard. While a number of technologies are available for removing arsenic, none of them...
| Main Authors: | , , , |
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| Format: | Journal Article |
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Maney Publishing
2017
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| Online Access: | http://hdl.handle.net/20.500.11937/57913 |
| _version_ | 1848760130573697024 |
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| author | Feng, C. Aldrich, C. Eksteen, J. Arrigan, Damien |
| author_facet | Feng, C. Aldrich, C. Eksteen, J. Arrigan, Damien |
| author_sort | Feng, C. |
| building | Curtin Institutional Repository |
| collection | Online Access |
| description | © 2017 Canadian Institute of Mining, Metallurgy and Petroleum Arsenic adversely affects gold mining operations by interfering with the extraction of gold, as well as posing a significant health and environmental hazard. While a number of technologies are available for removing arsenic, none of them is effective under all conditions. Although adsorption is a promising approach, most methods focus on the purification of water under neutral or acidic conditions and tend to be less effective in gold mining process waters, operating under highly alkaline conditions. In this study, the removal of As(III) and As(V) from both arsenic-only solutions and simulated process waters using composite magnetic nanoparticles was investigated. The nanoparticles consisted of magnetite (Fe 3 O 4 ) or maghemite (?-Fe 2 O 3 ) cores covered by various metal oxides with Langmuir adsorption capacities of As(III) and As(V) ranging from 31.4 to 79.1 mg g -1 and 10.2 to 25.5 mg g -1 , respectively, in arsenic-only solutions at pH 9. The adsorption capacities were further characterised by adsorption tests conducted in simulated process waters. The ability to remove As(III) is of particular importance as it is harder to remove it from alkaline solutions than As(V). The magnetic cores allow simple and efficient magnetic recovery of the As-loaded nanoparticles. |
| first_indexed | 2025-11-14T10:10:53Z |
| format | Journal Article |
| id | curtin-20.500.11937-57913 |
| institution | Curtin University Malaysia |
| institution_category | Local University |
| last_indexed | 2025-11-14T10:10:53Z |
| publishDate | 2017 |
| publisher | Maney Publishing |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | curtin-20.500.11937-579132017-11-20T08:58:25Z Removal of arsenic from gold processing circuits by use of novel magnetic nanoparticles Feng, C. Aldrich, C. Eksteen, J. Arrigan, Damien © 2017 Canadian Institute of Mining, Metallurgy and Petroleum Arsenic adversely affects gold mining operations by interfering with the extraction of gold, as well as posing a significant health and environmental hazard. While a number of technologies are available for removing arsenic, none of them is effective under all conditions. Although adsorption is a promising approach, most methods focus on the purification of water under neutral or acidic conditions and tend to be less effective in gold mining process waters, operating under highly alkaline conditions. In this study, the removal of As(III) and As(V) from both arsenic-only solutions and simulated process waters using composite magnetic nanoparticles was investigated. The nanoparticles consisted of magnetite (Fe 3 O 4 ) or maghemite (?-Fe 2 O 3 ) cores covered by various metal oxides with Langmuir adsorption capacities of As(III) and As(V) ranging from 31.4 to 79.1 mg g -1 and 10.2 to 25.5 mg g -1 , respectively, in arsenic-only solutions at pH 9. The adsorption capacities were further characterised by adsorption tests conducted in simulated process waters. The ability to remove As(III) is of particular importance as it is harder to remove it from alkaline solutions than As(V). The magnetic cores allow simple and efficient magnetic recovery of the As-loaded nanoparticles. 2017 Journal Article http://hdl.handle.net/20.500.11937/57913 10.1080/00084433.2017.1391737 Maney Publishing restricted |
| spellingShingle | Feng, C. Aldrich, C. Eksteen, J. Arrigan, Damien Removal of arsenic from gold processing circuits by use of novel magnetic nanoparticles |
| title | Removal of arsenic from gold processing circuits by use of novel magnetic nanoparticles |
| title_full | Removal of arsenic from gold processing circuits by use of novel magnetic nanoparticles |
| title_fullStr | Removal of arsenic from gold processing circuits by use of novel magnetic nanoparticles |
| title_full_unstemmed | Removal of arsenic from gold processing circuits by use of novel magnetic nanoparticles |
| title_short | Removal of arsenic from gold processing circuits by use of novel magnetic nanoparticles |
| title_sort | removal of arsenic from gold processing circuits by use of novel magnetic nanoparticles |
| url | http://hdl.handle.net/20.500.11937/57913 |