NDLI: Evaluation of groundwater quality based on radiological and hydrochemical data from two uraniferous regions of Western Iberia: Nisa (Portugal) and Ciudad Rodrigo (Spain)

Content Provider	Springer Nature Link
Author	Pereira, A. J. S. C. Pereira, M. D. Neves, L. J. P. F. Azevedo, J. M. M. Campos, A. B. A.
Copyright Year	2014
Abstract	The regions of Nisa (Portugal) and Ciudad Rodrigo (Spain) are characterized by a high radiation background due to the presence of uranium-enriched rocks. To evaluate the water quality of the shallow aquifers and the relationship between radiological and non-radiological variables, a set of 41 samples was collected (mainly from springs) and analyzed for the radioisotopes $^{238}$U, $^{234}$U, $^{226}$Ra and $^{222}$Rn as well as for some major and minor cations. The results obtained for the cationic composition in both areas show some differences in terms of geological bedrock, with higher mineralization and hardness in the Spanish samples (Ca–Mg facies); the Nisa samples are included in the Na–K facies. The indicative effective dose was calculated for several age groups. On average, the effective dose is higher in Nisa due to the activity in $^{226}$Ra, and 25 % of the total dataset puts $^{222}$Rn above the recommended acceptable maximum. Despite the low-scale ancient uranium exploitation works in the Nisa area in comparison to those carried out on the Spanish side, the higher risk calculated in the Portuguese region reinforces the importance of taking into account the natural background when the goal is to control the exposure of the population to ionizing radiation.
Starting Page	2717
Ending Page	2731
Page Count	15
File Format	PDF
ISSN	18666280
Journal	Environmental Earth Sciences
Volume Number	73
Issue Number	6
e-ISSN	18666299
Language	English
Publisher	Springer Berlin Heidelberg
Publisher Date	2014-08-09
Publisher Place	Berlin, Heidelberg
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Groundwater Quality Major and trace elements Radioisotopes U Iberia Geology Hydrology/Water Resources Geochemistry Environmental Science and Engineering Terrestrial Pollution Biogeosciences
Content Type	Text
Resource Type	Article
Subject	Global and Planetary Change Earth-Surface Processes Soil Science Environmental Chemistry Pollution Geology Water Science and Technology

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