Nanomineralogy of evaporative precipitation of efflorescent compounds from coal mine drainage
Efflorescent nanophases (NPs) are found as a transitory accumulation of potentially hazardous elements (PHEs), particularly in tropical climates. The central objective of this study was to investigate the distribution of PHEs with NPs through the evaporative formation structures (EFS) of enormously...
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| Format: | Article |
| Language: | English |
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Elsevier
2021-11-01
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| Series: | Geoscience Frontiers |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S1674987120301183 |
| _version_ | 1797724103151452160 |
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| author | Luis F.O. Silva Diana Pinto Guilherme L. Dotto James C. Hower |
| author_facet | Luis F.O. Silva Diana Pinto Guilherme L. Dotto James C. Hower |
| author_sort | Luis F.O. Silva |
| collection | DOAJ |
| description | Efflorescent nanophases (NPs) are found as a transitory accumulation of potentially hazardous elements (PHEs), particularly in tropical climates. The central objective of this study was to investigate the distribution of PHEs with NPs through the evaporative formation structures (EFS) of enormously PHEs-rich coal-mine drainages (CMD). The EFS were studied in natural coal mine drainage for five months in order to determine their geochemical and ecological structures and to assess their position in the reduction of PHEs in nature. The largest coal-fired power plant in South America, located in south Brazil, is used as an example of such a problem. In this work, a novel methodology for the analysis of PHEs in CMD precipitates is proposed for this affected coal area. The analytical method, combining X-Ray Diffraction (XRD) and advanced electron microscopies, shows the importance of nanomineralogy in understanding different circumstances of coal contamination. Several ultrafine-nanoparticles (UNPs) were identified in the sampled soils and river sediments together with the PHEs. A decrease in PHEs was identified in association with UNPs. However, further investigations are required with regard to the mobility of PHEs in water, atmosphere, soils, and sediments. The EPS was thoroughly studied, acquiring suitable understanding with investigational facts for Ca and Fe-sulphates, pickeringite, and several amorphous phases. |
| first_indexed | 2024-03-12T10:12:33Z |
| format | Article |
| id | doaj.art-3acceae958374648836ef45484d74fbe |
| institution | Directory Open Access Journal |
| issn | 1674-9871 |
| language | English |
| last_indexed | 2024-03-12T10:12:33Z |
| publishDate | 2021-11-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Geoscience Frontiers |
| spelling | doaj.art-3acceae958374648836ef45484d74fbe2023-09-02T10:46:54ZengElsevierGeoscience Frontiers1674-98712021-11-01126101003Nanomineralogy of evaporative precipitation of efflorescent compounds from coal mine drainageLuis F.O. Silva0Diana Pinto1Guilherme L. Dotto2James C. Hower3Department of Civil and Environmental. Universidad de La Costa, CUC, Calle 58 # 55–66, Barranquilla, Atlántico, Colombia; Corresponding author.Department of Civil and Environmental. Universidad de La Costa, CUC, Calle 58 # 55–66, Barranquilla, Atlántico, ColombiaUniversidade Federal de Santa Maria – UFSM, 1000, Roraima Avenue, 97105–900, Santa Maria, RS, BrazilUniversity of Kentucky, Department of Earth & Environmental Sciences, Lexington, KY, 40506, USA; University of Kentucky, Center for Applied Energy Research, 2540 Research Park Drive, Lexington, KY, 40511, USAEfflorescent nanophases (NPs) are found as a transitory accumulation of potentially hazardous elements (PHEs), particularly in tropical climates. The central objective of this study was to investigate the distribution of PHEs with NPs through the evaporative formation structures (EFS) of enormously PHEs-rich coal-mine drainages (CMD). The EFS were studied in natural coal mine drainage for five months in order to determine their geochemical and ecological structures and to assess their position in the reduction of PHEs in nature. The largest coal-fired power plant in South America, located in south Brazil, is used as an example of such a problem. In this work, a novel methodology for the analysis of PHEs in CMD precipitates is proposed for this affected coal area. The analytical method, combining X-Ray Diffraction (XRD) and advanced electron microscopies, shows the importance of nanomineralogy in understanding different circumstances of coal contamination. Several ultrafine-nanoparticles (UNPs) were identified in the sampled soils and river sediments together with the PHEs. A decrease in PHEs was identified in association with UNPs. However, further investigations are required with regard to the mobility of PHEs in water, atmosphere, soils, and sediments. The EPS was thoroughly studied, acquiring suitable understanding with investigational facts for Ca and Fe-sulphates, pickeringite, and several amorphous phases.http://www.sciencedirect.com/science/article/pii/S1674987120301183Coal mine drainageEvaporative precipitationSedimentsWater and soil pollution |
| spellingShingle | Luis F.O. Silva Diana Pinto Guilherme L. Dotto James C. Hower Nanomineralogy of evaporative precipitation of efflorescent compounds from coal mine drainage Geoscience Frontiers Coal mine drainage Evaporative precipitation Sediments Water and soil pollution |
| title | Nanomineralogy of evaporative precipitation of efflorescent compounds from coal mine drainage |
| title_full | Nanomineralogy of evaporative precipitation of efflorescent compounds from coal mine drainage |
| title_fullStr | Nanomineralogy of evaporative precipitation of efflorescent compounds from coal mine drainage |
| title_full_unstemmed | Nanomineralogy of evaporative precipitation of efflorescent compounds from coal mine drainage |
| title_short | Nanomineralogy of evaporative precipitation of efflorescent compounds from coal mine drainage |
| title_sort | nanomineralogy of evaporative precipitation of efflorescent compounds from coal mine drainage |
| topic | Coal mine drainage Evaporative precipitation Sediments Water and soil pollution |
| url | http://www.sciencedirect.com/science/article/pii/S1674987120301183 |
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