The natural radioactivity in Guarani aquifer groundwater, Brazil

Bonotto, Daniel Marcos; Bueno, T. O.

doi:10.1016/j.apradiso.2008.03.008

Cited by 50 publications

(21 citation statements)

References 31 publications

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“…238 U, together with 226 Ra, are the most abundant radionuclides accumulated in the Flix reservoir (Casacuberta et al, 2009). Our results are similar to those published by Bonotto and Bueno (2008). They estimated a mobility coefficient for 226 Ra in an aquifer 25 times higher than 238 U transported in the liquid phase.…”

Section: Impact Of Industries In the Accumulation Of Radionuclidessupporting

confidence: 90%

Impact of industries in the accumulation of radionuclides in the lower part of Ebro river (Catalonia, Spain)

et al. 2010

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Ebro River extends over almost 930 km and is the main Spanish river entering theMediterranean Sea. There are several industries located along this river course including a dicalcium phosphate factory (DCP) and two nuclear power reactors. These installations, together with other factors such as the geology, can contribute to the radiological content of the river. Therefore, this study was performed to determine some natural and also some anthropogenic radionuclide concentrations in the Ebro River ecosystem. We analysed water samples, solid samples (rice field sludge and surface marine sediment samples), and also biota samples (Cladophora glomerata and Cynodon dactylon). For water samples, gross alpha, gross beta, tritium, uranium, thorium and also a group of gamma-emitting isotopes' activities were determined. The main contribution to radioactivity for these samples was due to some isotopes from the uranium and thorium chain. For the solid samples, we quantified some natural and artificial gamma radioisotopes, which may be related to the geological and/or industrial activities located in this zone. In the case of biota, the results indicate that the presence of the DCP has a significant influence, since the highest activity was observed in the surroundings of this industry (

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Section: Impact Of Industries In the Accumulation Of Radionuclidessupporting

confidence: 90%

Impact of industries in the accumulation of radionuclides in the lower part of Ebro river (Catalonia, Spain)

et al. 2010

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“…One should also consider that 238 U has greater mobility and solubility than 232 Th [20]. For scales from the oil industry, for example, the activity concentrations of 226 Ra were always much larger than those for 228 Ra for samples with high concentrations of activity [9].…”

Section: Resultsmentioning

confidence: 99%

226Ra, 228Ra and 40K in scales from boilers of industrial installations

Poggi¹,

Farias²,

Silveira³

et al. 2015

J Radioanal Nucl Chem

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The purpose of this work was to determine concentrations of 226 Ra, 228 Ra and 40 K in scales generated inside industrial boilers. Radionuclide activities were determined by high resolution gamma-ray spectrometry. Activity concentrations of 226 Ra were in the range of 3.0 (22) to 1300 (6) Bq kg -1 and 228 Ra activity concentrations varied from \2.0 Bq kg -1 (Minimum detectable activity concentration) to 266 (3) Bq kg -1 . Activity concentrations of 40 K were in the range of \15 Bq kg -1 (Minimum detectable activity concentration) to 290 (5) Bq kg -1 . Activity concentrations were lower than the limits established by the Brazilian Commission of Nuclear Energy.

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“…(10) and (11) into Eq. (4) the following equation can be obtained P (Tr ≥ j) = p j−1 (12) or from Eq.…”

Section: Risk Analysis Methodology For Wastesmentioning

confidence: 99%

“…It presents the risk assessment of radionuclide concentrations through the spatial distribution of 40 K waste measurements in water. In order to implement the methodology the Guarani aquifer data are adopted by Bonotto and Bueno [10], and the relevant risk inferences are presented in detail.…”

Section: Introductionmentioning

confidence: 99%

A risk analysis model for radioactive wastes

Külahçı

2011

Journal of Hazardous Materials

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The natural radioactivity in Guarani aquifer groundwater, Brazil

Cited by 50 publications

References 31 publications

Impact of industries in the accumulation of radionuclides in the lower part of Ebro river (Catalonia, Spain)

Impact of industries in the accumulation of radionuclides in the lower part of Ebro river (Catalonia, Spain)

226Ra, 228Ra and 40K in scales from boilers of industrial installations

A risk analysis model for radioactive wastes

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