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| Titel: |
Possible Changes in Radiation Background of the Natural Environment Caused by Coal Mine Activity |
| Auteur: |
Skubacz, K. Lebecka, J. Chalupnik, S. Wysocka, M. |
| Verschenen in: |
Energy sources. Part A, Recovery utilization and environmental effects |
| Paginering: | Jaargang 14 (1992) nr. 2 pagina's 149-153 |
| Jaar: |
1992-04-01 |
| Inhoud: |
Highly mineralized waters with salt content up to 200 kg/m3 occur in carboniferous strata in upper Silesia. These waters often contain high 226Ra concentration, reaching 400 kBq/m3, and flow from the surrounding rocks into mine workings and then have to be pumped out to the surface, finally ending in the rivers. Radium-bearing waters of type A contain significant amounts of barium ions. In these cases radium is easily co-precipitated with barium in the form of BaSO4 + RaSO4. The specific radioactivity of such deposits can be as high as 1 MBqlkg. Radioactive deposits cause elevated gamma radiation levels up to 200 pA/kg and also some elevation of radon daughter concentrations in air. Usually the contamination is limited to small areas lying near streambeds where radium-bearing waters have flowed. Nevertheless, waste materials from coal mines may cause significant radioactive pollution of the natural environment. In carboniferous strata, so-called radium-bearing waters of type B occur. These waters contain considerable amounts of sulfates but do not contain Ba2+ ions. In type B waters the concentration of 226Ra reaches 12 kBq/m3. In this case there are no chemical conditions for forming highly radioactive deposits. |
| Uitgever: |
Taylor & Francis |
| Bronbestand: |
Elektronische Wetenschappelijke Tijdschriften |
Details van artikel 6 van 13 gevonden artikelen
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