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Use of radiometric ((234/238)U and (228/226)Ra) and mass spectrometry ((87/86)Sr) methods for studies of the stability of groundwater reservoirs in Central Poland.

Grabowski P, Bem H, Romer RL - J Radioanal Nucl Chem (2014)

Bottom Line: The uranium and radium activity ratios and strontium isotopic ratio varied from 0.629 to 1.471, from 0.396 to 4.961 and from 0.708438 to 0.710344, respectively.On the basis of the uranium and radium activity and the strontium isotopic ratio differences in subsurface water (groundwater) and in river water, any possible water influx between these adjacent reservoirs can be observed.The obtained results exclude any water transport from surface and subsurface water to thermal ground water reservoirs in this region of Poland.

View Article: PubMed Central - PubMed

Affiliation: Department of Chemistry, Technical University of Lodz, Zeromskiego Street 116, 90-924 Lodz, Poland ; Faculty of Building Engineering, Mechanics, and Petrochemistry, Institute of Chemistry, Warsaw University of Technology, Lukasiewicza Street 17, 09-400 Plock, Poland.

ABSTRACT

The uranium ((234)U/(238)U) and radium ((228)Ra/(226)Ra) activity ratios and (87)Sr/(86)Sr isotopic ratio in thermal groundwater, subsurface water (groundwater) and river water from Poddebice and Uniejow were determined. The uranium and radium activity ratios and strontium isotopic ratio varied from 0.629 to 1.471, from 0.396 to 4.961 and from 0.708438 to 0.710344, respectively. The results for the thermal groundwater samples showed that the radiometric method together with mass spectrometry stable strontium isotope ratio measurements can be used for underground water transport studies. On the basis of the uranium and radium activity and the strontium isotopic ratio differences in subsurface water (groundwater) and in river water, any possible water influx between these adjacent reservoirs can be observed. The obtained results exclude any water transport from surface and subsurface water to thermal ground water reservoirs in this region of Poland.

No MeSH data available.


228Ra/226Ra activity ratio in water samples from Uniejow
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Fig3: 228Ra/226Ra activity ratio in water samples from Uniejow

Mentions: In Figs. 2 and 3 the seasonal fluctuations of the 228/226Ra activity ratio in different types of water reservoirs from Poddebice and Uniejow are shown, respectively. For the deeply situated (below 1,500 m) thermal groundwater, observed fluctuations are almost negligible with the mean activity ratio of radium isotopes equal to 1.64 and 0.64, respectively. These results show that in Poddebice and Uniejow are two different thermal groundwater type in different rock background in spite of low distance between this two cities (16 km). According to the geological profile in the Poddebice region and information from Geotermia Poddebice Ltd (a company managing the geothermal bore-hole) these are mostly sandstones and arenaceous shale geological formations. Lower 228Ra to 226Ra activity ratio groundwater reservoir is caused by surface water infiltration from this mostly agricultural area, where fertilizers containing traces of uranium and 226Ra are widely used. These results correspond well also to the data obtained by Struchi et al. [15] They reported that for a similar rock background the 228Ra/226Ra activity ratio ranged from 1.39 to 1.53, whereas for limestone these values were lower and ranged from 0.21 to 0.80.Fig. 2


Use of radiometric ((234/238)U and (228/226)Ra) and mass spectrometry ((87/86)Sr) methods for studies of the stability of groundwater reservoirs in Central Poland.

Grabowski P, Bem H, Romer RL - J Radioanal Nucl Chem (2014)

228Ra/226Ra activity ratio in water samples from Uniejow
© Copyright Policy - OpenAccess
Related In: Results  -  Collection

Show All Figures
getmorefigures.php?uid=PMC4514664&req=5

Fig3: 228Ra/226Ra activity ratio in water samples from Uniejow
Mentions: In Figs. 2 and 3 the seasonal fluctuations of the 228/226Ra activity ratio in different types of water reservoirs from Poddebice and Uniejow are shown, respectively. For the deeply situated (below 1,500 m) thermal groundwater, observed fluctuations are almost negligible with the mean activity ratio of radium isotopes equal to 1.64 and 0.64, respectively. These results show that in Poddebice and Uniejow are two different thermal groundwater type in different rock background in spite of low distance between this two cities (16 km). According to the geological profile in the Poddebice region and information from Geotermia Poddebice Ltd (a company managing the geothermal bore-hole) these are mostly sandstones and arenaceous shale geological formations. Lower 228Ra to 226Ra activity ratio groundwater reservoir is caused by surface water infiltration from this mostly agricultural area, where fertilizers containing traces of uranium and 226Ra are widely used. These results correspond well also to the data obtained by Struchi et al. [15] They reported that for a similar rock background the 228Ra/226Ra activity ratio ranged from 1.39 to 1.53, whereas for limestone these values were lower and ranged from 0.21 to 0.80.Fig. 2

Bottom Line: The uranium and radium activity ratios and strontium isotopic ratio varied from 0.629 to 1.471, from 0.396 to 4.961 and from 0.708438 to 0.710344, respectively.On the basis of the uranium and radium activity and the strontium isotopic ratio differences in subsurface water (groundwater) and in river water, any possible water influx between these adjacent reservoirs can be observed.The obtained results exclude any water transport from surface and subsurface water to thermal ground water reservoirs in this region of Poland.

View Article: PubMed Central - PubMed

Affiliation: Department of Chemistry, Technical University of Lodz, Zeromskiego Street 116, 90-924 Lodz, Poland ; Faculty of Building Engineering, Mechanics, and Petrochemistry, Institute of Chemistry, Warsaw University of Technology, Lukasiewicza Street 17, 09-400 Plock, Poland.

ABSTRACT

The uranium ((234)U/(238)U) and radium ((228)Ra/(226)Ra) activity ratios and (87)Sr/(86)Sr isotopic ratio in thermal groundwater, subsurface water (groundwater) and river water from Poddebice and Uniejow were determined. The uranium and radium activity ratios and strontium isotopic ratio varied from 0.629 to 1.471, from 0.396 to 4.961 and from 0.708438 to 0.710344, respectively. The results for the thermal groundwater samples showed that the radiometric method together with mass spectrometry stable strontium isotope ratio measurements can be used for underground water transport studies. On the basis of the uranium and radium activity and the strontium isotopic ratio differences in subsurface water (groundwater) and in river water, any possible water influx between these adjacent reservoirs can be observed. The obtained results exclude any water transport from surface and subsurface water to thermal ground water reservoirs in this region of Poland.

No MeSH data available.