Application of radon (222Rn) as an environmental tracer in hydrogeological and geological investigations: An overview

Sukanya, S.; Jacob, Noble; Joseph, Sabu

doi:10.1016/j.chemosphere.2022.135141

Cited by 59 publications

(19 citation statements)

References 208 publications

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“…The measure of 222 Rn activity differs from surface water of lakes or rivers, as radon in underground water is not mobile as in the surface of the surface of the earth. Methods of obtaining water from underneath the earth in wells or boreholes disperse high levels of radon to the atmosphere [12]. Figure 3 illustrates the dispersion of radon from rocks to water.…”

Section: Transport Of Radon In the Environmentmentioning

confidence: 99%

An Overview of Radon Emanation Measurement System for South African Communities

Radebe¹,

Mathuthu²

2023

Rare Earth Elements - Emerging Advances, Technology Utilization, and Resource Procurement

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The aim of the study is to evaluate radon emanation levels in South African communities and to implement possible strategies to reduce radon levels in order to minimize potential health hazards. The major contributing factor to high levels of radon is the history of mining. To precisely measure emanation levels of radon indoors and outdoors, calibrated radon detectors are necessary. In this study, areas of high radon emanation levels are spotted, and based on the radon emission point or entry points in buildings, applicable and possible mitigation strategies are discussed for implementation.

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Section: Transport Of Radon In the Environmentmentioning

confidence: 99%

An Overview of Radon Emanation Measurement System for South African Communities

Radebe¹,

Mathuthu²

2023

Rare Earth Elements - Emerging Advances, Technology Utilization, and Resource Procurement

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“…The main methods of reservoir leakage detection include abnormal flow field analysis, borehole geophysical exploration, the seismic surface wave method, GIS, hydrochemical analysis, the tracer test, and other geophysical methods [5][6][7][8][9][10][11]. Among these, the groundwater tracer test represents a crucial methodology for elucidating flow systems, and is extensively applied in hydrogeological surveys and the identification of leakage within the hydraulic structures [12].…”

Section: Introductionmentioning

confidence: 99%

Application of the Tracer Test in a Hydrogeological Survey for a Pumped Storage Power Station

Chen,

Zhang,

Chen

et al. 2024

Water

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In areas with complex hydrogeological conditions, the tracer test method is often used as an effective means in hydrogeological surveys. According to the results of tracer tests, hydrogeological parameters, including hydraulic gradient and permeability coefficient, fracture network leakage passages and their scale, and groundwater flow rate and direction can be quantitatively determined. This paper takes the upper reservoir of Yongxin Pumped Storage Power Station in Jiangxi Province as the research object, and focuses on the complex hydrogeological conditions of the upper reservoir. Three sets of tracer tests and multiple sets of single-hole flow rate and direction tests were conducted on the left and right banks of the reservoir and near surface gullies. The results showed that ZKS18 received tracers in all three tests, which indicates a close hydraulic connection between ZKS18 and the left bank, right bank, and surface gullies within the reservoir. Based on the single or multiple peak values of the tracer, it was determined that there are 1–6 leakage passages in the fractured rocks, with leakage passage sizes of 0.1–0.4 mm. According to the single-hole flow rate and flow direction tests, a self-developed instrument was used to determine the groundwater flow rate and flow direction at different depths in the test holes, which yielded results that were basically consistent with the results of the three-hole method. These results provide a basis for the use of tracer tests in hydrogeological surveys for water conservancy and hydropower engineering, and anti-seepage design of upper reservoirs.

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“…Radon ( 222 Rn) is a colourless, odourless, inert, and radioactive noble gas that emanates from rocks and soil as a result of the alpha decay of its parent, radium ( 226 Ra) in the decay series of uranium-238. Out of the 37 radioactive isotopes ( 193 Rn to 229 Rn) of radon, 222 Rn is the most abundant and the one having longest half-life (t 1/2 = 3.8 days) compared to its other isotopes (Sukanya et al, 2022;Sukanya et al, 2021;Baskaran, 2016). Semprini et al (2000) offers the rst theoretical modelling to apply Rn tracer in NAPL contaminations.. Several studies have reported interesting results about the application of Rn de cit technique in NAPL plume localization and quanti cation both in satured (Barrio-Parra et al, 2021; Davis et al, 2005;Hunkeler et al, 1997) and insatured soil (Briganti et al, 2021;Mattia et al, 2020;Schubert et al, 2007;Schubert et al, 2001).…”

Section: Introductionmentioning

confidence: 99%

Vertical Non-Aqueous Phase Liquid distribution by Rn prospecting for 3D plume modelling in polluted sites

Briganti

Voltaggio

Rainaldi³

et al. 2023

Preprint

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In the frame of a collaboration, between CNR-IGAG and Mares s.r.l., on the triennial project “CANDAC-Mares 2020” about the study of Non-Aqueous Phase Liquid (NAPL) contaminated sites, the Laboratory of Environmental Radioactivity, IGAG-CNR Montelibretti organized a study on the possibility to determine on-site radon vertical distribution as NAPL contamination tracer at different soil depths. Rn deficit technique, based on preferential solubility of natural radiogenic soil gas Rn into non-polar fluids, such as refine hydrocarbons, has been studied in various theoretical and applied researches so far. According to international scientific literature, Rn deficit can be used both in geochemical prospection of the areal irregular pollutant distribution and in monitoring of remediation activities successfully. Unfortunately the vertical location of the plume still represents a scientific challenge even though is well known this type of pollutant can be distributed along the vertical soil profile due to its density in comparison to water density, fluctuations of shallow aquifers, soil pore size distribution, aging of contamination and so on. In this article, a method to determine Rn vertical profile is tested and applied to assess Rn deficit technique applicability in vertical detection of pollutant presence for the first time in a fuel station. Two NAPL contaminated sites are selected for a pilot test. Results obtained seem to support the use of vertical Rn geochemical prospection for a 3D complete reconstruction of contaminant dispersion in different soil levels in order to monitoring plume changes during time due to natural attenuation and/or remediation activities.

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Application of radon (222Rn) as an environmental tracer in hydrogeological and geological investigations: An overview

Cited by 59 publications

References 208 publications

An Overview of Radon Emanation Measurement System for South African Communities

An Overview of Radon Emanation Measurement System for South African Communities

Application of the Tracer Test in a Hydrogeological Survey for a Pumped Storage Power Station

Vertical Non-Aqueous Phase Liquid distribution by Rn prospecting for 3D plume modelling in polluted sites

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