Uranium in groundwater – The importance of hydraulic regime and groundwater flow system's understanding

Erőss, Anita; Csondor, Katalin; Izsák, Bálint; Vargha, Márta; Horváth, Ákos; Pándics, Tamás

doi:10.1016/j.jenvrad.2018.10.002

Cited by 26 publications

(15 citation statements)

References 15 publications

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“…This may be related to the continuous inflow and adsorption of nuclides by sediments at the bottom of the riverbed. In addition, hydraulic properties of the water body could have also lowered the concentrations [38]. Therefore, hydrological processes are responsible for off-site contaminant transport in the study area [7].…”

Section: Radionuclide Activity Concentrations In Watermentioning

confidence: 99%

Determination of radionuclide concentration and radiological hazard in soil and water near the uranium tailings reservoir in China

Liu

Wei-bo

Gao

et al. 2021

Environmental Pollutants and Bioavailability

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Radioactive levels and radiological hazard assessment associated with exposure to radionuclides from uranium tailings were investigated in this study. Herein, the concentrations of 238 U, 226 Ra, 232 Th, and 40 K in 36 samples including 25 soil and 11 water samples were measured using a low background HPGe semiconductor detector. The radionuclide concentrations were much lower outside the tailings reservoir than inside the reservoir; however, both exceeded the national average and world average values. The mean concentrations of 238 U, 226 Ra, 232 Th, and 40 K in water samples were higher than the WHO guideline levels. The radionuclide transfer factors showed that the radionuclides in soil of the tailings enter the surrounding water. Additionally, the radiological hazard indices around the reservoir were much higher than the worldwide average. Results suggest that the high level of radiation in the tailings reservoir posed a potential threat to the health of the local residents.

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Section: Radionuclide Activity Concentrations In Watermentioning

confidence: 99%

Determination of radionuclide concentration and radiological hazard in soil and water near the uranium tailings reservoir in China

Liu

Wei-bo

Gao

et al. 2021

Environmental Pollutants and Bioavailability

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“…Groundwater is a geologic agent as it interacts with its environment and it is able to mobilise, transport and accumulate matter, amongst others also radioactive elements (T� oth, 1999). The members of the uranium and thorium decay series are ubiquitous in groundwater, especially uranium, radium and radon, and they are efficient natural tracers of groundwater (Bourdon et al, 2003;Hoehn, 1998;Porcelli and Swarzenski, 2003;Swarzenski, 2007;Skeppstr€ om and Olofsson, 2007;Er} oss et al, 2012). The geochemical behavior of uranium and radium is affected by the redox state of system and sorption sites related to redox conditions (Dickson, 1990;Porcelli and Swarzenski, 2003), therefore they are representative for different segments of the flow paths, depending on the geochemical conditions.…”

Section: Introductionmentioning

confidence: 99%

“…Under circumneutral pH conditions complexes with carbonates and phosphates are dominant (Porcelli and Swarzenski, 2003). In terms of flow systems, uranium can be mobile along local flow paths and in recharge areas (Er} oss et al, 2019), where oxidizing environment prevails. On the contrary, retardation of radium is high in oxidizing groundwater because of the adsorption on manganese and iron oxide surfaces (Ames et al, 1983).…”

Section: Introductionmentioning

confidence: 99%

“…simultaneous occurrence of several radioisotopes, high dissolved solid-, high nitrate-, high iron content) (Jobb� agy et al, 2010a(Jobb� agy et al, , 2014. Nuclide specific analyses combined with hydrogeological investigations provide a new aspect of the analysis of natural radioactivity of groundwater (Er} oss et al, 2012(Er} oss et al, , 2019, which may serve as a complementary approach assisting safe drinking water supply. Several studies were aimed to investigate the natural radioactivity of groundwater and spring water in Hungary, but none of these studies dealt with river bank filtration systems as yet (Jobb� agy et al, 2010b(Jobb� agy et al, , 2011Somlai et al, 2007;Er} oss et al, 2015;Kov� acs Bodor et al, 2019).…”

Section: Introductionmentioning

confidence: 99%

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Transient nature of riverbank filtered drinking water supply systems - A new challenge of natural radioactivity assessment

Csondor

Baják

Surbeck

et al. 2020

Journal of Environmental Radioactivity

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In Hungary the drinking water supply is mainly based on groundwater, in which radionuclides are common components. Since the mobility of the most common radionuclides, uranium and radium, is strongly influenced by the geochemical conditions, knowledge on the geochemical parameters of water is required. This depends on the flow system and the flow regime. Therefore, hydrogeology has a crucial role in revealing the origin of elevated activity concentrations. This research presents a case study in Hungary where the drinking water supply is provided by bank filtered and karst wells. In most of the wells of the research area the gross alpha values are above the screening level, 0.1 Bq L 1. The aim of this study is to determine which radionuclides may cause the elevated radioactivity and explain their occurrence using the hydrogeological approach. All samples of the study were analysed for (U-238þU-234), Ra-226, Rn-222. Alpha spectrometry applied on Nucfilm discs was used to measure the uranium and radium activity while radon activity was determined by liquid scintillation. The study revealed the correlation between the river water level fluctuation and the uranium content of the wells. The results of this study highlighted the transient nature of river bank filtered systems, which should be taken into account in the monitoring and water supply strategy.

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“…The use of a geomorphological system is very appropriate to show the relationship between parts of a system in an object. Groundwater flow systems are influenced by several factors [20], [21]. Hubbert [22] added that groundwater flow is caused by potential differences in the fluid.…”

mentioning

confidence: 99%

Zone of Groundwater Quantitative Potential Based on the Characteristics of a Confined Aquifer at the Palu Groundwater Basin Central Sulawesi Province, Indonesia

Zeffitni¹,

Basir-Cyio²,

Napitupulu³

2019

Int. J. Adv. Sci. Eng. Inf. Technol.

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Groundwater is water stored in aquifers in a groundwater basin, which is influenced by geologic, hydrogeological, tectonic forces, and the structure of the earth. Increased water demand causes problems in water management, which are characterized by a decrease in water availability, especially groundwater. Groundwater resources are renewable, but refill time is relative, depending on water availability, surface conditions, rainfall, lithology, hydraulic conductivity, topography, groundwater level depth, and the influence of the nature of unsaturated zones. These conditions cause a decrease in groundwater availability. This phenomenon is also found in Central Sulawesi Province, especially at Palu Groundwater Basin. The distribution of groundwater potential, which has the spatial and temporal characteristics of the confined aquifer, has caused insufficient water supply at Palu Groundwater Basin. Thus, according to the problem, the research objectives are to analyze groundwater quantitative potential based on the characteristics of a confined aquifer on each hydro-morphology and the hydrogeology units of the aquifer. The study of the groundwater quantitative potential is based on spatial, geomorphologic, and geologic approaches, and is required to be done with survey methods, and analysis using Darcy's Law. The research result indicates that: The characteristic of a confined aquifer consists of an aquifer system in alluvial plains together with denudation. Based on the topographic relief variation conditions, including the structure of the material and geomorphic process, the lithology and stratigraphy that sort Palu Groundwater Basin consists of Alluvium and the Pakuli Formation with the lithology variation. Confined aquifers are big (> 10.0 l/sec). The potency groundwater zone in the Palu Groundwater Basin is fluctuated greatly, ranging from high to medium. The groundwater potency based on a hydro-morphology at landform unit alluvial plains varies between medium to high potency.

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Uranium in groundwater – The importance of hydraulic regime and groundwater flow system's understanding

Cited by 26 publications

References 15 publications

Determination of radionuclide concentration and radiological hazard in soil and water near the uranium tailings reservoir in China

Determination of radionuclide concentration and radiological hazard in soil and water near the uranium tailings reservoir in China

Transient nature of riverbank filtered drinking water supply systems - A new challenge of natural radioactivity assessment

Zone of Groundwater Quantitative Potential Based on the Characteristics of a Confined Aquifer at the Palu Groundwater Basin Central Sulawesi Province, Indonesia

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