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Radon contribute in average with about 50% at the natural irradiation of people in the whole word and it is considered as responsible for a part of lung cancer death, being proved the second main cause for this illness after smoking. In other case, high soil radon anomalies are connected with the presence of tectonic faults or fissures and earthqua...
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... up to 4000 Bq⋅m -3 have been found ( Sainz et al., 2009;Cucoş et al., 2012). Ştei- Băiţa area includes the town Ştei and few villages (Băiţa-Plai, Băiţa-Sat, Nucet, Fânaţe, Câmpani etc.) with a total of 16,000 inhabitants, located in the Bihor Mountains, in North-West of Romania, in the neighborhood of "Avram Iancu" and "Băiţa" uranium mines (see Fig. 1). The main reasons for high indoor radon concentrations in this region are represented by the using of uranium tailings from uranium mines (operating in the period of 1950-1990) as building material. Also the soil under foundation with high radon concentration and soil gas permeability promotes the flow of radon-bearing gas from soil ...
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Citations
... The release of soil-gas radon is controlled by factors such as geological structure, lithology, uranium mineralization, and soil thickness; however, proximity to the fault plane and bedrock lithology are the dominant controls on soil-gas radon emissions (Choubey et al., 1999). Soil-gas radon measurements at the Peceneaga-Camena Fault (Dobrogea, Romania) produced a consistent and clear signal that enabled the existence and position of the fault zone to be inferred from the location of the peak radon concentrations (Cosma et al., 2014). In addition, the highest radon concentrations were recorded in intensely fractured areas, consistent with the presence of shallow fractures (Zarroca et al., 2012). ...
The radon concentration in soil gas at the crustal surface is closely related to the development of local fractures. Therefore, the spatial variation in soil-gas radon concentrations across faults differs between fault zones located in different tectonic environments. This study investigates the Beiluntai thrust fault and the Haiyuan strike-slip fault in west China, which are assumed to be typical examples of the different types of faults. Radon concentrations in soil gas were measured at various locations around these faults, and the spatial variation in these concentrations was characterized along fault-perpendicular profiles. For normal fault, our results indicate that concentrations are usually highest at the fault, and decrease gradually away from the fault in either direction. For thrust, however, concentrations increase in the hanging wall approaching the fault, but decrease sharply at the fault. For strike-slip fault with extension across the fault, soil-gas radon concentrations are relatively high at the fault, and decrease gradually with distance from the fault. For strike-slip fault with contraction across the fault, soil-gas radon concentrations are relatively low at the fault, and increase gradually with distance from the fault.
... Human body is exposed to radon by inhaling Cucos-Dinu et al., 2012;Sainz et al., 2009;Cosma et al., 2014) and ingestion. Radon is readily released from surface water; consequently, groundwater contains potentially much higher concentrations of radon than surface water. ...
Alba County is defined by a complex geological structure, having pegmatite and gnais formations that can be associated to large radon concentrations. Radon and radium concentrations (Ra-226 and Rn-222) were measured in various water sources: springs, wells, rivers and public water supply network. The water samples were collected from six places in the county of Alba (Romania). The method used to find radon and radium values were the scintillation method, based on Lucas Cells. The radon concentrations found varied between 11.51 and 22 Bq/L for the well water, from 1.6 to 2.13 Bq/L for the surface water, between 19.34 and 24 Bq/L for spring water, and from 0.9 to 1.66 Bq/L in the case of public water network source, respectively. The values of the measurements performed during this study indicate that the local population is not exposed to additional natural irradiation.
... The data presented in this paper, the radon levels, 226 Ra levels, correlated with aquatic or food chain/local agricultural products monitoring programs are useful to establish and implement specific measures, in order to ensure protection of the environment and population against radiation regarding TENORM [20, [25][26][27]. ...
The present work is directed to characterize the phosphogypsum (PG) wastes by means of in situ atmospheric radon measurements, gross-alpha and gamma-ray spectrometry measurements. The average radon concentrations in three locations: Valea Calugareasca, Navodari and Turnu Magurele are 21.88 ± 3.19, 26.56 ± 2.90 and 33.43 ± 3.64 (Bq × m−3), respectively. The γ-ray measurements showed that the total activities are 1510.62 ± 148.08, 1838.77 ± 165.04, 1363.83 ± 147.96 (Bq × kg−1). The results shows in all cases elevated levels of radon and 226Ra for PG samples, indicating the necessity to find suitable routes to reduce its radiation impact on the surrounding environment.
... Radon in buildings is considered to be the most important indoor air pollutant, with harmful health effects of the entire population. Inhalation of radon and its short-live decay products increases the risk of lung cancer [1][2][3][4]. A way to decrease the indoor radon concentration in dwellings is to apply mitigation techniques based on the barrier of radon gas from the soil into buildings. ...
The aim of this work is to determine diffusion parameter of different types of waterproof membranes and
insulating materials by measuring continuously radon concentrations in source and receiver sides of the measurement device. Our methods were tested on three types of membranes from polyethylene foils of high, low and very low density (HDPE, LDPE and VLDPE). Measurement results were compared using two mathematical models for analytical solving the one-dimensional Fick’s diffusion equation. The results are compared by other measurement results obtained in the intercomparison, from Prague.
