1,720,996 research outputs found
Radioecological Studies, Selected papers presented at the International Conference on Environmental Radioactivity – New Frontiers and Developments
No full textIsotope distribution of dissolved carbonate species in southeastern coastal aquifers of Sicily (Italy)
No full textConcentrations of major ions and the δ13C composition of dissolved inorganic carbon in groundwater and submarine groundwater discharges in the area between Siracusa and Ragusa provinces, southeastern Sicily, representing coastal carbonate aquifers, are presented and discussed. Most of groundwater analysed belongs to calcium bicarbonate type, in agreement with the geological nature of carbonate host rocks. Carbonate groundwater acquires, besides the dissolution of carbonate minerals, dissolved carbon (and the relative isotopic composition) from the atmosphere and from soil biological activity. In fact, δ13C values and total dissolved inorganic carbon contents show that both these sources contribute to carbon dissolved species in the waters studied. Finally, mixing with seawater in the second main factor of groundwater mineralization Copyright © 2007 John Wiley & Sons, Ltd
Low-level 226Ra determination in groundwater samples by SF-ICP-MS: optimization of separation and pre-concentration methods
No full textEstimation of the radioactive source dispersion from Fukushima nuclear power plant accident
No full textThe role of isotopes in understanding the groundwater circulation in coastal areas of the south-eastern Sicily (Italy)
No full textUranium groundwater monitoring and seismic analysis: a case study of the Gran Sasso hydrogeological basin, Italy
No full textGround gamma-ray survey of the Solforata gas discharge area, Alban Hills-Italy: A comparison between field and laboratory measurements
No full text"Measurements of environmental radioactivity by HPGe gamma-spectrometry were carried out with the aim of investigating the distribution of natural radionuclides in a volcanic area and to compare two different methodologies an in situ gamma-survey of the area and high accuracy laboratory measurements of soil samples. Results demonstrate good performance of the in situ technique, also confirmed by a correlation analysis between the results obtained by the two methodologies. A volcanic gas discharge area was chosen as the test site for the presence of natural long-lived radionuclides such as K-40 and U-238, U-235 and Th-232, and their decay chain members. Clear evidence of Rn-222 degassing in the area was confirmed by Ra-226 values measured by the in situ technique. Higher K-40 values measured by the in situ technique may be attributed to the presence of vegetation in the study area. (C) 2012 Elsevier Ltd. All rights reserved.
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