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  • 11
    Electronic Resource
    Electronic Resource
    ^9^9Tc in surface air samples during the years 1965-1967
    Amsterdam : Elsevier
    The @International Journal Of Applied Radiation And Isotopes 35 (1984), S. 961-963 
    Details
    ISSN: 0020-708X
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Energy, Environment Protection, Nuclear Power Engineering , Physics
    Type of Medium: Electronic Resource
    URL: http://linkinghub.elsevier.com/retrieve/pii/0020-708X(84)90211-4
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  • 12
    Electronic Resource
    Electronic Resource
    Determination and lebels of99Tc in environmental and biological samples (1990)
    Springer
    Journal of radioanalytical and nuclear chemistry 138 (1990), S. 171-179 
    Details
    ISSN: 1588-2780
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Energy, Environment Protection, Nuclear Power Engineering
    Notes: Abstract In this paper, the physical and chemical methods used in our laboratory for the measurement of99Tc in natural samples are reviewed. Levels of99Tc in rainwater, algae, and freshwater samples are given. In addition, and estimation of the radiological impact of99Tc to the population, derived from our earliear atmospheric99Tc measurements, is presented. For rainwater, levels of137Cs are also given for comparison.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02049360
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  • 13
    Electronic Resource
    Electronic Resource
    Measurements of U- and Ra-isotopes in rainwater samples (1991)
    Springer
    Journal of radioanalytical and nuclear chemistry 152 (1991), S. 37-46 
    Details
    ISSN: 1588-2780
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Energy, Environment Protection, Nuclear Power Engineering
    Notes: Abstract Concentrations of U- and Ra-isotopes in rainwater samples taken in the South Spanish atmospheric environment during the years 1986, 1987 and 1988 are presented. Such data have been obtained by applying a simple method for the simultaneous determination of such radionuclides from the same rainwater sample. Ra is firstly coprecipitated as Ba−Ra sulfate. Then two alternatives can be used for U analysis: a coprecipitation of U with Fe, followed by a selective redissolution of the precipitate with ammonium carbonate, or a solvent extraction technique by using tributyl phosphate. Levels of 0.99 to 1.81 μg/l, 3.4 to 17.9 mBq/l and 0.5 to 5.5 mBq/l, respectively for U,226Ra and224Ra are found during the studied time period. The dependence of such concentration variability on meteorological parameters is discussed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02042139
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  • 14
    Electronic Resource
    Electronic Resource
    Natural radioactivity enhancement by human activities in rivers of the southwest of Spain (1991)
    Springer
    Journal of radioanalytical and nuclear chemistry 155 (1991), S. 97-106 
    Details
    ISSN: 1588-2780
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Energy, Environment Protection, Nuclear Power Engineering
    Notes: Abstract The occurrence of anomalous enhancements of U-isotope activities in the surrounding environment of a phosphate fertilizer factory complex at the southwest of Spain has been established. It seems that significant amounts of U, released by such industries, are being accumulated in the environment, which may substantially contribute to the collective radiation dose received by the local population.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02165063
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  • 15
    Electronic Resource
    Electronic Resource
    Anthropogenic emissions of210Po,210Pb and226Ra in an estuarine environment (1996)
    Springer
    Journal of radioanalytical and nuclear chemistry 207 (1996), S. 357-367 
    Details
    ISSN: 1588-2780
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Energy, Environment Protection, Nuclear Power Engineering
    Notes: Abstract An extensive study on the distribution of natural radionuclides in an estuarine ecosystem located in Southwestern Spain is presented. This environment is highly affected by the wastes released by a phosphoric acid industry which uses phosphate rocks as raw material for fertilizer production. This rock has generally high concentrations of U and its daughters. The estuary is formed by two rivers, Odiel and Tinto, which have a common mouth into the Atlanic Ocean and a salt marsh (Odiel marsh) affected by the income of Odiel riverwaters. This river receives directly the liquid and part of the solid (gypsum) wastes released from the industries. Besides that, most of the phosphogypsum wastes are stored in uncovered piles at the right margin of the Tinto river. The study has concluded that the wastes from such industries are the cause of the enhanced concentrations found at the bed of both river channels as well as the enhancement found in surface soils in certain zones of the Odiel wet marshland. Indeed, the Northern marsh and the Mojarrera channel at the Odiel marsh seem to be the main sinks of the contaminant released by the phosphoric acid industry.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02071241
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  • 16
    Electronic Resource
    Electronic Resource
    On the fractionation of natural radioactivity in the production of phosphoric acid by the wet acid method (1996)
    Springer
    Journal of radioanalytical and nuclear chemistry 214 (1996), S. 77-88 
    Details
    ISSN: 1588-2780
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Energy, Environment Protection, Nuclear Power Engineering
    Notes: Abstract The fractionation of different natural radionuclides (U-isotopes,226Ra and210Po) in the process used for the production of phosphoric acid in some factories located in the southwest of Spain is analyzed. As a consequence, different ways of natural radionuclide liberation to the environment can be evaluated due to these industrial activities.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02164808
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  • 17
    Electronic Resource
    Electronic Resource
    Ra-isotopes around a phosphate fertilizer complex in an estuarine system at the Southwest of Spain (1993)
    Springer
    Journal of radioanalytical and nuclear chemistry 172 (1993), S. 71-79 
    Details
    ISSN: 1588-2780
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Energy, Environment Protection, Nuclear Power Engineering
    Notes: Abstract The presence of224Ra and226Ra in waters from an estuarine system which surrounds a phosphate fertilizer complex (southwest Spain) has been studied. The high activities obtained confirm that an important radiological impact from such industrial complex on its close environment is being produced. The influence of tidal oscillations and seasonal conditions on activity concentration has also been investigated.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02040663
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  • 18
    Electronic Resource
    Electronic Resource
    Natural radioactivity in the Guadalquivir river at the South of Spain (1994)
    Springer
    Journal of radioanalytical and nuclear chemistry 178 (1994), S. 337-350 
    Details
    ISSN: 1588-2780
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Energy, Environment Protection, Nuclear Power Engineering
    Notes: Abstract U, Th and Ra isotopic activities have been measured in water and sediment samples collected over three years from the Guadalquivir river channel (South of Spain). The study of the radioactivity levels and activity ratios evolution in space and time has provided information on the behavior of the radionuclides mentioned above in the estuarine and non-estuarine zones of the river.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02039727
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  • 19
    Electronic Resource
    Electronic Resource
    Radium isotopes in suspended matter in an estuarine system in the southwest of Spain (1994)
    Springer
    Journal of radioanalytical and nuclear chemistry 183 (1994), S. 395-407 
    Details
    ISSN: 1588-2780
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Energy, Environment Protection, Nuclear Power Engineering
    Notes: Abstract The presence of226Ra and224Ra in suspended matter from an estuarine system which surrounds a phosphate fertilizer complex has been investigated. The results have confirmed an important radioactive impact from the industrial complex, since up to 2.5 Bq226Ra/g suspended matter (dry) has been measured. The influence of tides and seasonal conditions, through changes in salinity, has been found to be relevant. The distribution coefficients for226Ra between the suspended matter and the river water have been calculated. The values are in agreement by order of magnitude with those found in the literature, but they clearly depend on tidal state and seasonal conditions.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02038008
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  • 20
    Electronic Resource
    Electronic Resource
    Analysis of99Tc atmospheric samples (1987)
    Springer
    Journal of radioanalytical and nuclear chemistry 115 (1987), S. 377-388 
    Details
    ISSN: 1588-2780
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Energy, Environment Protection, Nuclear Power Engineering
    Notes: Abstract The analysis of99Tc was carried out in filter, peat and rainwater samples. A solvent extraction technique was used to separate Tc from them, where tributylphosphate was the extracting agent. Radiochemical yield was obtained by using99mTc as an internal tracer. A typical value of 60% was found for it. However, problems encountered in its determination are discussed in the text. Additionally, rainwater samples were analyzed for137Cs. This was adsorbed in ammonium phosphomolibdate. Radiochemical yield was obtained by using134Cs as an internal tracer.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02037451
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