Influencing effect of heat-treatment on radon emanation and exhalation characteristic of red mud
| Autor: | Tibor Kovács, János Szántó, Zoltán Sas, János Somlai, János Kovács |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2015 |
| Předmět: |
Hot Temperature
Health Toxicology and Mutagenesis By-product Mineralogy chemistry.chemical_element Radon Radon exhalation Building material industry Radiation Monitoring Environmental Chemistry Porosity Waste Management and Disposal Red mud Construction Materials Exhalation General Medicine Additional material Pollution Visual evidence chemistry Volume (thermodynamics) Heat-treatment Air Pollutants Radioactive |
| Zdroj: | Sas, Z, Szántó, J, Kovács, J, Somlai, J & Kovács, T 2015, ' Influencing effect of heat-treatment on radon emanation and exhalation characteristic of red mud ', Journal of Environmental Radioactivity, vol. 148, pp. 27-32 . https://doi.org/10.1016/j.jenvrad.2015.06.002 |
| DOI: | 10.1016/j.jenvrad.2015.06.002 |
| Popis: | The reuse of industrial by-products is important for members of numerous industrial sectors. However, though the benefits of reuse are evident from an economical point of view, some compounds in these materials can have a negative effect on users' health.In this study, the radon emanation and exhalation features of red mud were surveyed using heat-treatment (100-1200 °C). As a result of the 1200°C-treated samples, massic radon exhalation capacity reduced from 75 ± 10 mBq kg-1 h-1 to 7 ± 4 mBq kg-1 h-1, approximately 10% of the initial exhalation rate.To find an explanation for internal structural changes, the porosity features of the heat-treated samples were also investigated. It was found that the cumulative pore volume reduced significantly in less than 100 nm, which can explain the reduced massic exhalation capacity in the high temperature treated range mentioned above.SEM snapshots were taken of the surfaces of the samples as visual evidence for superficial morphological changes. It was found that the surface of the high temperature treated samples had changed, proving the decrement of open pores on the surface. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|