Aging simulation of the tailings from Stava fluorite extraction by exposure to gamma rays
Abstract Tailings storage facilities are disposal systems for storing the waste products of the mining industry consisting of a slurry mixture made of soil, rock and water that remain after the mineral values have been removed from the patent ore. Tailings dams are supposed to last forever, so after...
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| Format: | Article |
| Language: | English |
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Fundação Gorceix
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| Series: | REM: International Engineering Journal |
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| Online Access: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S2448-167X2017000400483&lng=en&tlng=en |
| _version_ | 1818683533509525504 |
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| author | Gianluca Bella Fernando Soares Lameiras Terezinha de Jesus Espósito Monica Barbero Fabrizio Barpi |
| author_facet | Gianluca Bella Fernando Soares Lameiras Terezinha de Jesus Espósito Monica Barbero Fabrizio Barpi |
| author_sort | Gianluca Bella |
| collection | DOAJ |
| description | Abstract Tailings storage facilities are disposal systems for storing the waste products of the mining industry consisting of a slurry mixture made of soil, rock and water that remain after the mineral values have been removed from the patent ore. Tailings dams are supposed to last forever, so after their deposition, tailings can experience aging processes with physical and chemical changes depending on the interactions between local conditions and source mineralogy. The consequences of these aging processes are increased interlocking of particles and oxidation processes, sometimes making previously safely held contaminants available and mobile. Among the long-term aging processes, the natural ionizing radiation (from radioactive isotopes of the soils, cosmic rays, and also ultraviolet rays from the sun) can be considered, as proposed in the current research. Furthermore, in many countries, tailings are beginning to be re-used as backfill, landscaping material or feedstock for cement and concrete. So if any, the long-term physical and chemical modifications could affect the hydraulic and mechanical behaviour of tailings with relevant economic consequences. For these reasons, wet and dry silty samples of tailings spilled out after the failure of the Stava tailings dam (Trentino Alto Adige, Italy) were exposed to gamma rays, as an accelerated aging technique to simulate the natural ionizing radiation, and then characterized. The modifications on physical and chemical properties were observed and, despite certain chemical stability, some physical changes were observed, particularly in terms of size particle distribution, inner porosity of the particles and specific surface. |
| first_indexed | 2024-12-17T10:36:15Z |
| format | Article |
| id | doaj.art-fd8d07ef59934b8fa2c7b6f0d758a774 |
| institution | Directory Open Access Journal |
| issn | 2448-167X |
| language | English |
| last_indexed | 2024-12-17T10:36:15Z |
| publisher | Fundação Gorceix |
| record_format | Article |
| series | REM: International Engineering Journal |
| spelling | doaj.art-fd8d07ef59934b8fa2c7b6f0d758a7742022-12-21T21:52:24ZengFundação GorceixREM: International Engineering Journal2448-167X70448349010.1590/0370-44672016700163S2448-167X2017000400483Aging simulation of the tailings from Stava fluorite extraction by exposure to gamma raysGianluca BellaFernando Soares LameirasTerezinha de Jesus EspósitoMonica BarberoFabrizio BarpiAbstract Tailings storage facilities are disposal systems for storing the waste products of the mining industry consisting of a slurry mixture made of soil, rock and water that remain after the mineral values have been removed from the patent ore. Tailings dams are supposed to last forever, so after their deposition, tailings can experience aging processes with physical and chemical changes depending on the interactions between local conditions and source mineralogy. The consequences of these aging processes are increased interlocking of particles and oxidation processes, sometimes making previously safely held contaminants available and mobile. Among the long-term aging processes, the natural ionizing radiation (from radioactive isotopes of the soils, cosmic rays, and also ultraviolet rays from the sun) can be considered, as proposed in the current research. Furthermore, in many countries, tailings are beginning to be re-used as backfill, landscaping material or feedstock for cement and concrete. So if any, the long-term physical and chemical modifications could affect the hydraulic and mechanical behaviour of tailings with relevant economic consequences. For these reasons, wet and dry silty samples of tailings spilled out after the failure of the Stava tailings dam (Trentino Alto Adige, Italy) were exposed to gamma rays, as an accelerated aging technique to simulate the natural ionizing radiation, and then characterized. The modifications on physical and chemical properties were observed and, despite certain chemical stability, some physical changes were observed, particularly in terms of size particle distribution, inner porosity of the particles and specific surface.http://www.scielo.br/scielo.php?script=sci_arttext&pid=S2448-167X2017000400483&lng=en&tlng=enagingtailingsirradiationgamma rays |
| spellingShingle | Gianluca Bella Fernando Soares Lameiras Terezinha de Jesus Espósito Monica Barbero Fabrizio Barpi Aging simulation of the tailings from Stava fluorite extraction by exposure to gamma rays REM: International Engineering Journal aging tailings irradiation gamma rays |
| title | Aging simulation of the tailings from Stava fluorite extraction by exposure to gamma rays |
| title_full | Aging simulation of the tailings from Stava fluorite extraction by exposure to gamma rays |
| title_fullStr | Aging simulation of the tailings from Stava fluorite extraction by exposure to gamma rays |
| title_full_unstemmed | Aging simulation of the tailings from Stava fluorite extraction by exposure to gamma rays |
| title_short | Aging simulation of the tailings from Stava fluorite extraction by exposure to gamma rays |
| title_sort | aging simulation of the tailings from stava fluorite extraction by exposure to gamma rays |
| topic | aging tailings irradiation gamma rays |
| url | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S2448-167X2017000400483&lng=en&tlng=en |
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