Bioavailability of 239+240Pu and 137Cs in aerosols and deposited dusts: a comparative study by fractional extraction.
The bioavailability of (137)Cs and (239+240)Pu in soil, dust and aerosols has been determined by applying a fractional extraction procedure. In aerosols, 47-57% of (137)Cs was found to be easily exchangeable. This differs significantly from soil and deposited dust samples collected on a nearby street as well as on grassland where (137)Cs was quantitatively found in the acid-soluble fraction and the residue. A similar difference was observed for (239+240)Pu: 47% of (239+240)Pu in aerosols was associated with the organic fraction, while in soil and deposited dust from grassland 63-75% of (239+240)Pu was found in the acid-soluble fraction. In deposited street dust, 53% of (239+240)Pu was associated with the oxide fraction.
Gerstmann
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Institute of Radiation Protection, GSF-National Research Center for Environment and Health, Ingolstädter Landstrasse 1, 85764 Neuherberg, Germany. gerstmann@gsf.de
Rosner
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Schramel
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D000336:Aerosols / Q000032:analysis*; D002588:Cesium Radioisotopes / Q000032:analysis*; D005591:Chemical Fractionation; D004391:Dust / Q000032:analysis*; D005858:Germany; D007554:Isotopes; D011005:Plutonium / Q000032:analysis*; D011847:Radioactive Fallout; D012990:Soil Pollutants, Radioactive / Q000032:analysis
D000336:Aerosols; D002588:Cesium Radioisotopes; D004391:Dust; D007554:Isotopes; D011847:Radioactive Fallout; D012990:Soil Pollutants, Radioactive; D011005:Plutonium