Impact of the geological substrate on the radiological content of Galician waters

Llerena, J.J.; Cortina, D.; Durán, I.; Sorribas, R.

doi:10.1016/j.jenvrad.2012.08.014

Cited by 14 publications

(7 citation statements)

References 4 publications

(2 reference statements)

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“…5) described by Araujo Nesperaira et al (2021). In this sense, Llerena et al (2013) showed similar contribution of 238-U and 232-Th in traditional springs; Th clearly dominates in the concentrations of spa waters. As previously indicated, Th has a low mobility, when released into the environment is rapidly immobilized by precipitation as oxide or phosphate, also by adsorption over clay minerals, hydroxides or organic matter (LOCUTURA RUPÉREZ et al, 2012).…”

Section: Background Of U and Th In Sediments Of Bedrock Riversmentioning

confidence: 69%

BACKGROUND OF U AND Th IN SEDIMENTS OF BEDROCK RIVERS

Álvarez-Vázquez

Álvarez

Prego³

2021

Environ. Smoke

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The Miño River is a good example of bedrock rivers, where sediment geochemistry is scarcely studied. Its urban reach when passing through the city of Ourense gathers some characteristics that provide interest to its sediments, like scarcity of fine sediments accumulation and the impact of several human activities. Sediments trapped by potholes and other rock cavities were considered. In order to evaluate society-nature interactions through sediment composition it is critical to determine the compositional background (in absence of human alterations), particularly when working with trace elements. This work presents an exploratory assay to determine background in sediments from bedrock rivers by using two uncommon elements, uranium (U) and thorium (Th). To determine their background different statistical techniques were applied in order to set the background composition value and calculate possible enrichments. Background was calculated by simple least squares lineal regression by using Al as independent variable (reference element) resulting in 8.7 mgU kg-1 and 5.6 mgTh kg-1. Enrichments were found in some particular samples and can be attributed to intrinsic microenvironment complexities inside rock cavities.

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Section: Background Of U and Th In Sediments Of Bedrock Riversmentioning

confidence: 69%

BACKGROUND OF U AND Th IN SEDIMENTS OF BEDROCK RIVERS

Álvarez-Vázquez

Álvarez

Prego³

2021

Environ. Smoke

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“…The high variability of the Rn-222 activity concentrations can be explained by their different origins and the lithology of the aquifer host rocks (LLERENA et al, 2013). Larger values are found in groundwater, based on the geology of the studied site (FONOLLOSA et al, 2016).…”

Section: Discussionmentioning

confidence: 94%

Investigation of the activity of Rn-222 along a small stream in the Representative Basin of Juatuba - MG

Ferreira

Chagas

Moreira

et al. 2018

RBRH

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For thousands of years, water has been the focus of experimentation toward solving the challenges associated with human water supply, navigation, irrigation, and sanitation. The use of tracers to study water resources is an efficient approach that can facilitate the modeling of many hydrological scenarios. The goal of this paper is to show results of research that tracked the presence of Rn-222, a natural tracer, in the surface waters of a small watercourse in southeastern part of Brazil. RAD 7, which is an electronic and portable radon detector, was the main instrument used in this survey. We analyzed 117 water samples and converted the radon activity results to effective radiation doses with respect to the hypothetical human consumption of these waters. We also analyzed the sediments of the watercourse. The obtained data showed that the radon activity in the studied waters varies between 0.52-76.96 Bq/m3. We determined the effective dose of all samples to be less than 1 mSv y−1, and its consumption to present no risk to human health. The existence of connections between surface and subsurface waters in the stream is possible, and radon peaks may indicate the existence of discharge zones into the surface water body.

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“…These may be the reasons for the highest radon concentration in the ATB soil in Qom. In one study in Galician (Spain) on granite soils it was reported that there was a weak correlation between 222 Rn concentration and the gross beta activity as well as the radium content of water [37]. In another research near Anar fault of Yazd province (Iran), it was concluded geological structure had an important impact on radon concentration.…”

Section: Resultsmentioning

confidence: 99%

Radon concentration and effective dose in drinking groundwater and its relationship with soil type

Fouladi-Fard

Amraei

Fahiminia

et al. 2020

J Radioanal Nucl Chem

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The current study measured the concentration of 222 Rn in 36 stations obtained from the drinking water resources of Qom province using Radon detector device (RTM 1688-2 model) in two seasons of autumn and winter in 2017. The results of this cross-sectional study showed that the concentration of radon in drinking water in Qom province ranged from 0.29 ± 0.11 to 2.20 ± 0.81 Bq/l. The highest effective dose in terms of mSv/y was found for male adults (0.04). Radon concentrations of all samples were lower than those set by WHO standards, and the effective dose received by consumers was less than values set by the WHO guidelines (0.1 mSv /y).

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Impact of the geological substrate on the radiological content of Galician waters

Cited by 14 publications

References 4 publications

BACKGROUND OF U AND Th IN SEDIMENTS OF BEDROCK RIVERS

BACKGROUND OF U AND Th IN SEDIMENTS OF BEDROCK RIVERS

Investigation of the activity of Rn-222 along a small stream in the Representative Basin of Juatuba - MG

Radon concentration and effective dose in drinking groundwater and its relationship with soil type

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