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Renard F, Putnis CV, Montes-Hernandez G, King HE, Breedveld GD, Okkenhaug G. Sequestration of Antimony on Calcite Observed by Time-Resolved Nanoscale Imaging. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2018; 52:107-113. [PMID: 29210275 DOI: 10.1021/acs.est.7b04727] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
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.
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Affiliation(s)
- François Renard
- Department of Geosciences, Physics of Geological Processes, University of Oslo , Oslo, Norway
- Univ. Grenoble Alpes, CNRS, ISTerre , 38000, Grenoble, France
| | - Christine V Putnis
- Institut für Mineralogie, University of Münster , Corrensstrasse 24, 48149 Münster, Germany
- The Institute for Geoscience Research (TIGeR), Department of Chemistry, Curtin University , Perth, 6845, Australia
| | | | - Helen E King
- Department of Earth Sciences, Utrecht University Budapestlaan 4 , 3584 CD Utrecht, The Netherlands
| | - Gijs D Breedveld
- Department of Geosciences, Physics of Geological Processes, University of Oslo , Oslo, Norway
- Norwegian Geotechnical Institute , box 3930, Ullevål Stadion, 0806 Oslo, Norway
| | - Gudny Okkenhaug
- Norwegian Geotechnical Institute , box 3930, Ullevål Stadion, 0806 Oslo, Norway
- Norwegian University of Life Sciences, Faculty of Environmental Sciences and Natural Resource Management , box 5003, 1432 Ås, Norway
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Teymouri A, Stuart BJ, Kumar S. Hydroxyapatite and dittmarite precipitation from algae hydrolysate. ALGAL RES 2018. [DOI: 10.1016/j.algal.2017.11.030] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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