Sequestration of Antimony on Calcite Observed by Time-Resolved Nanoscale Imaging
Antimony, which has damaging effects on the human body and the ecosystem, can be released into soils, ground-, and surface waters either from ore minerals that weather in near surface environments, or due to anthropogenic releases from waste rich in antimony, a component used in batteries, electroni...
| Main Authors: | , , , , , |
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| Format: | Journal Article |
| Published: |
American Chemical Society
2018
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| Online Access: | http://hdl.handle.net/20.500.11937/59777 |
| _version_ | 1848760551955496960 |
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| author | Renard, F. Putnis, Christine Montes-Hernandez, G. King, H. Breedveld, G. Okkenhaug, G. |
| author_facet | Renard, F. Putnis, Christine Montes-Hernandez, G. King, H. Breedveld, G. Okkenhaug, G. |
| author_sort | Renard, F. |
| building | Curtin Institutional Repository |
| collection | Online Access |
| description | Antimony, which has damaging effects on the human body and the ecosystem, can be released into soils, ground-, and surface waters either from ore minerals that weather in near surface environments, or due to anthropogenic releases from waste rich in antimony, a component used in batteries, electronics, ammunitions, plastics, and many other industrial applications. Here, we show that dissolved Sb can interact with calcite, a widespread carbonate mineral, through a coupled dissolution–precipitation mechanism. The process is imaged in situ, at room temperature, at the nanometer scale by using an atomic force microscope equipped with a flow-through cell. Time-resolved imaging allowed following the coupled process of calcite dissolution, nucleation of precipitates at the calcite surface and growth of these precipitates. Sb(V) forms a precipitate, whereas Sb(III) needs to be oxidized to Sb(V) before being incorporated in the new phase. Scanning-electron microscopy and Raman spectroscopy allowed identification of the precipitates as two different calcium–antimony phases (Ca2Sb2O7). This coupled dissolution–precipitation process that occurs in a boundary layer at the calcite surface can sequester Sb as a solid phase on calcite, which has environmental implications as it may reduce the mobility of this hazardous compound in soils and groundwaters. |
| first_indexed | 2025-11-14T10:17:35Z |
| format | Journal Article |
| id | curtin-20.500.11937-59777 |
| institution | Curtin University Malaysia |
| institution_category | Local University |
| last_indexed | 2025-11-14T10:17:35Z |
| publishDate | 2018 |
| publisher | American Chemical Society |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | curtin-20.500.11937-597772018-06-01T00:51:14Z Sequestration of Antimony on Calcite Observed by Time-Resolved Nanoscale Imaging Renard, F. Putnis, Christine Montes-Hernandez, G. King, H. Breedveld, G. Okkenhaug, G. Antimony, which has damaging effects on the human body and the ecosystem, can be released into soils, ground-, and surface waters either from ore minerals that weather in near surface environments, or due to anthropogenic releases from waste rich in antimony, a component used in batteries, electronics, ammunitions, plastics, and many other industrial applications. Here, we show that dissolved Sb can interact with calcite, a widespread carbonate mineral, through a coupled dissolution–precipitation mechanism. The process is imaged in situ, at room temperature, at the nanometer scale by using an atomic force microscope equipped with a flow-through cell. Time-resolved imaging allowed following the coupled process of calcite dissolution, nucleation of precipitates at the calcite surface and growth of these precipitates. Sb(V) forms a precipitate, whereas Sb(III) needs to be oxidized to Sb(V) before being incorporated in the new phase. Scanning-electron microscopy and Raman spectroscopy allowed identification of the precipitates as two different calcium–antimony phases (Ca2Sb2O7). This coupled dissolution–precipitation process that occurs in a boundary layer at the calcite surface can sequester Sb as a solid phase on calcite, which has environmental implications as it may reduce the mobility of this hazardous compound in soils and groundwaters. 2018 Journal Article http://hdl.handle.net/20.500.11937/59777 10.1021/acs.est.7b04727 American Chemical Society restricted |
| spellingShingle | Renard, F. Putnis, Christine Montes-Hernandez, G. King, H. Breedveld, G. Okkenhaug, G. Sequestration of Antimony on Calcite Observed by Time-Resolved Nanoscale Imaging |
| title | Sequestration of Antimony on Calcite Observed by Time-Resolved Nanoscale Imaging |
| title_full | Sequestration of Antimony on Calcite Observed by Time-Resolved Nanoscale Imaging |
| title_fullStr | Sequestration of Antimony on Calcite Observed by Time-Resolved Nanoscale Imaging |
| title_full_unstemmed | Sequestration of Antimony on Calcite Observed by Time-Resolved Nanoscale Imaging |
| title_short | Sequestration of Antimony on Calcite Observed by Time-Resolved Nanoscale Imaging |
| title_sort | sequestration of antimony on calcite observed by time-resolved nanoscale imaging |
| url | http://hdl.handle.net/20.500.11937/59777 |