Radon Concentration

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Rohit Mehra - One of the best experts on this subject based on the ideXlab platform.

  • assessment of Radon Concentration and heavy metal contamination in groundwater of udhampur district jammu kashmir india
    Environmental Geochemistry and Health, 2018
    Co-Authors: Ajay Kumar, Sumit Sharma, Rohit Mehra, Priya Kanwar, R Mishra, Inderpreet Kaur
    Abstract:

    Radon Concentration was measured in water samples of 41 different locations from Udhampur district of Jammu & Kashmir, India, by using RAD7 and Smart RnDuo monitor. The variation of Radon Concentration in water ranged from 1.44 ± 0.31 to 63.64 ± 2.88 Bq L−1, with a mean value of 28.73 Bq L−1 using RAD7 and 0.64 ± 0.28 to 52.65 ± 2.50 Bq L−1, with a mean value of 20.30 Bq L−1 using Smart RnDuo monitor, respectively. About 17.07% of the studied water samples recorded to display elevated Radon Concentration above the reference range suggested by United Nation Scientific Committee on the Effects of Atomic Radiations (UNSCEAR). The mean annual effective dose of these samples was determined, and 78.95% samples were found to be within the safe limits set by World Health Organisation (WHO) and European Council (EU). The study revealed good agreement between the values obtained with two methods. Heavy metals (Zn, Cd, Fe, Cu, Ni, As, Hg, Co, Pb and Cr) were determined in water samples by microwave plasma atomic emission spectrometer, and their correlation with Radon content was also analysed.

  • assessment of Radon Concentration and heavy metal contamination in groundwater samples from some areas of fazilka district punjab india
    Indoor and Built Environment, 2017
    Co-Authors: Ajay Kumar, Rohit Mehra, Saurabh Narang, Surinder Singh
    Abstract:

    Groundwater samples taken from 20 villages of Fazilka district, Punjab, India were analysed for Radon Concentration using RAD7, which is an electronic Radon detector. Radon Concentration varies from (1.4 � 1.0) � 10 3 Bq/m 3 to (4.9 � 3.0) � 10 3 Bq/m 3 , which is much below the safe limits proposed by US Environmental Protection Agency (US EPA) and UN Scientific Committee on the Effects of Atomic Radiation. The mean annual effective dose calculated for these samples was also found to be within the limits provided by WHO and EU council. These samples were also analysed for Concentration of certain heavy elements like As, Pb, Zn, Cu, Hg, Ni and Cd using inductively coupled plasma atomic emission spectrometer. Out of these, Concentrations of As and Pb were found to exceed the permissible limits suggested by US EPA.

  • estimation of Radon Concentration in soil and groundwater samples of northern rajasthan india
    Journal of Radiation Research and Applied Sciences, 2016
    Co-Authors: Sudhir Mittal, Asha Rani, Rohit Mehra
    Abstract:

    Abstract In the present investigation, analysis of Radon Concentration in 20 water and soil samples collected from different locations of Bikaner and Jhunjhunu districts of Rajasthan, India has been carried out by using RAD7 an electronic Radon detector. The measured Radon Concentration in water samples lies in the range from 0.50 to 22 Bq l−1 with the mean value of 4.42 Bq l−1, which lies within the safe limit from 4 to 40 Bq l−1 recommended by United Nations Scientific Committee on the Effects of Atomic Radiation (UNSCEAR, 2008). The total annual effective dose estimated due to Radon Concentration in water ranges from 1.37 to 60.06 μSV y−1 with the mean value of 12.08 μSV y−1, which is lower than the safe limit 0.1 mSv y−1 as set by World Health Organization (WHO, 2004) and European Council (EU, 1998). Radon measurement in soil samples varies from 941 to 10,050 Bq m−3 with the mean value of 4561 Bq m−3, which lies within the range reported by other investigators. It was observed that the soil and water of Bikaner and Jhunjhunu districts are suitable for drinking and construction purpose without posing any health hazard.

  • a study of Radon Concentration in drinking water samples of amritsar city of punjab india
    Radiation Protection and Environment, 2016
    Co-Authors: Ajay Kumar, Manpreet Kaur, Sumit Sharma, Rohit Mehra
    Abstract:

    Radon Concentration has been estimated in drinking water samples of 17 selected locations in Amritsar city of Punjab, India. RAD7, an electronic solid state Radon monitor has been used to evaluate the Radon Concentration in collected drinking water samples. The corresponding annual mean effective dose for ingestion and inhalation was calculated according to parameters introduced by UNSCEAR (2000) report. The Radon Concentration in drinking water samples has been found to vary from 0.53 ± 0.11 to 11.20 ± 1.40 Bql −1 . The values of Radon Concentration in these samples were found below the recommended limit proposed by USEPA (1991) and European Commission (2001). The range of calculated annual effective dose varied between 1.45 and 30.57 ΅Svy −1 . These values lie well within the safe limit prescribed by the WHO (2003) and European council (2005). The purpose of this study was to assess the radiological risk, if any, to human health due to consumption of drinking water that is available at Amritsar city.

  • analysis of Radon Concentration in drinking water in hanumangarh district of rajasthan india
    Radiation Protection and Environment, 2013
    Co-Authors: Vikas Duggal, Rohit Mehra, Asha Rani
    Abstract:

    Radon levels were measured in drinking water samples collected from Hanumangarh district of Rajasthan, India. The measurements were performed by RAD7 an electronic Radon detector manufactured by Durridge Company Inc. The Radon Concentration in these samples is found to vary from (1.6 ± 0.6) to (5.4 ± 0.7) Bq/l with a mean value of (3.3 ± 1.1) Bq/l. These recorded values are compared with the safe limit values recommended for drinking water by various health and environmental protection agencies. The recorded values of Radon Concentration are within the safe limit of 11 Bq/l recommended by the US Environmental Protection Agency. The annual effective dose for ingestion and inhalation is also evaluated in this research. The estimated total effective dose varies from 4.29 to 14.47 μSv/year. The total effective dose in all locations of the studied area is found to be within the safe limit (0.1 mSv/year) recommended by World Health Organization and European Council.

Ajay Kumar - One of the best experts on this subject based on the ideXlab platform.

  • assessment of Radon Concentration and heavy metal contamination in groundwater of udhampur district jammu kashmir india
    Environmental Geochemistry and Health, 2018
    Co-Authors: Ajay Kumar, Sumit Sharma, Rohit Mehra, Priya Kanwar, R Mishra, Inderpreet Kaur
    Abstract:

    Radon Concentration was measured in water samples of 41 different locations from Udhampur district of Jammu & Kashmir, India, by using RAD7 and Smart RnDuo monitor. The variation of Radon Concentration in water ranged from 1.44 ± 0.31 to 63.64 ± 2.88 Bq L−1, with a mean value of 28.73 Bq L−1 using RAD7 and 0.64 ± 0.28 to 52.65 ± 2.50 Bq L−1, with a mean value of 20.30 Bq L−1 using Smart RnDuo monitor, respectively. About 17.07% of the studied water samples recorded to display elevated Radon Concentration above the reference range suggested by United Nation Scientific Committee on the Effects of Atomic Radiations (UNSCEAR). The mean annual effective dose of these samples was determined, and 78.95% samples were found to be within the safe limits set by World Health Organisation (WHO) and European Council (EU). The study revealed good agreement between the values obtained with two methods. Heavy metals (Zn, Cd, Fe, Cu, Ni, As, Hg, Co, Pb and Cr) were determined in water samples by microwave plasma atomic emission spectrometer, and their correlation with Radon content was also analysed.

  • assessment of Radon Concentration and heavy metal contamination in groundwater samples from some areas of fazilka district punjab india
    Indoor and Built Environment, 2017
    Co-Authors: Ajay Kumar, Rohit Mehra, Saurabh Narang, Surinder Singh
    Abstract:

    Groundwater samples taken from 20 villages of Fazilka district, Punjab, India were analysed for Radon Concentration using RAD7, which is an electronic Radon detector. Radon Concentration varies from (1.4 � 1.0) � 10 3 Bq/m 3 to (4.9 � 3.0) � 10 3 Bq/m 3 , which is much below the safe limits proposed by US Environmental Protection Agency (US EPA) and UN Scientific Committee on the Effects of Atomic Radiation. The mean annual effective dose calculated for these samples was also found to be within the limits provided by WHO and EU council. These samples were also analysed for Concentration of certain heavy elements like As, Pb, Zn, Cu, Hg, Ni and Cd using inductively coupled plasma atomic emission spectrometer. Out of these, Concentrations of As and Pb were found to exceed the permissible limits suggested by US EPA.

  • a study of Radon Concentration in drinking water samples of amritsar city of punjab india
    Radiation Protection and Environment, 2016
    Co-Authors: Ajay Kumar, Manpreet Kaur, Sumit Sharma, Rohit Mehra
    Abstract:

    Radon Concentration has been estimated in drinking water samples of 17 selected locations in Amritsar city of Punjab, India. RAD7, an electronic solid state Radon monitor has been used to evaluate the Radon Concentration in collected drinking water samples. The corresponding annual mean effective dose for ingestion and inhalation was calculated according to parameters introduced by UNSCEAR (2000) report. The Radon Concentration in drinking water samples has been found to vary from 0.53 ± 0.11 to 11.20 ± 1.40 Bql −1 . The values of Radon Concentration in these samples were found below the recommended limit proposed by USEPA (1991) and European Commission (2001). The range of calculated annual effective dose varied between 1.45 and 30.57 ΅Svy −1 . These values lie well within the safe limit prescribed by the WHO (2003) and European council (2005). The purpose of this study was to assess the radiological risk, if any, to human health due to consumption of drinking water that is available at Amritsar city.

  • Risk assessment of exposure to Radon Concentration and heavy metal analysis in drinking water samples in some areas of Jammu & Kashmir, India
    Journal of Radioanalytical and Nuclear Chemistry, 2015
    Co-Authors: Ajay Kumar, Raman Vij, Munish Gupta, Sanjay Sharma, Surinder Singh
    Abstract:

    Radon Concentration was measured in drinking water samples in some areas of Jammu & Kashmir, India, using RAD 7, an electronic solid state silicon detector. The observed values of Radon Concentration in some samples exceed the safe limit as recommended by the US Environmental Protection Agency (USEPA). These samples were also analyzed for Concentration of certain heavy elements like As, Pb, Zn, Cu, Hg, Ni, and Cd using inductively coupled plasma atomic emission spectrometer (ICP-AES). The study was undertaken from the health hazard point of view.

Peter Bossew - One of the best experts on this subject based on the ideXlab platform.

  • Prediction of long-term indoor Radon Concentration based on short-term measurements
    Nuclear Technology & Radiation Protection, 2017
    Co-Authors: Zdenka Stojanovska, Kremena Ivanova, Peter Bossew, Blazo Boev, S Zora Zunic, Martina Tsenova, Zoran Curguz, Predrag Kolarz, Milka Zdravkovska, Mimoza Ristova
    Abstract:

    We present a method for the estimation of annual Radon Concentration based on short-term (three months) measurements. The study involves results from two independent sets of indoor Radon Concentration measurements performed in 16 cities of the Republic of Macedonia. The first data set contains winter and annual Radon Concentration obtained during the National survey in 2010 and the second, contains only the Radon Concentration measured during the winter of 2013. Both data sets pertain to Radon Concentration from the same cities and have been measured applying the same methodology in ground floor dwellings. The results appeared to be consistent and the dispersion of Radon Concentration was low. Linear regression analysis of the Radon Concentration measured in winter of 2010 and of the 2010 annual Radon Concentration revealed a high coefficient of determination R2 = 0.92, with a relative uncertainty of 3%. Furthermore, this model was used to estimate the annual Radon Concentration solely from winter-term measurements performed in 2013. The geometrical mean of the estimated annual Radon Concentration of the 2013: Radon Concentration (A-2013) =98 Bqm-3 was almost equal to the geometrical mean of the annual Radon Concentration from the 2010, Radon Concentration (A-2010) = 99 Bqm-3. Analysis of the influence of building characteristics, such as presence/absence of a basement in the building, or the dominant building material on the estimated annual Radon Concentration is also reported. Our results show that a low number of relatively short-term Radon measurements may produce a reasonable insight into a gross average obtained in a larger survey

  • variance of indoor Radon Concentration major influencing factors
    Science of The Total Environment, 2016
    Co-Authors: Ilia V Yarmoshenko, Peter Bossew, A Vasilyev, Georgy Malinovsky, Zora S žunic, A Onischenko, M Zhukovsky
    Abstract:

    Variance of Radon Concentration in dwelling atmosphere is analysed with regard to geogenic and anthropogenic influencing factors. Analysis includes review of 81 national and regional indoor Radon surveys with varying sampling pattern, sample size and duration of measurements and detailed consideration of two regional surveys (Sverdlovsk oblast, Russia and Niska Banja, Serbia). The analysis of the geometric standard deviation revealed that main factors influencing the dispersion of indoor Radon Concentration over the territory are as follows: area of territory, sample size, characteristics of measurements technique, the Radon geogenic potential, building construction characteristics and living habits. As shown for Sverdlovsk oblast and Niska Banja town the dispersion as quantified by GSD is reduced by restricting to certain levels of control factors. Application of the developed approach to characterization of the world population Radon exposure is discussed.

  • Radon in indoor air of primary schools a systematic survey to evaluate factors affecting Radon Concentration levels and their variability
    Indoor Air, 2014
    Co-Authors: F Bochicchio, G. Venoso, Zora S žunic, Carmela Carpentieri, S Antignani, Vinicio Carelli, Carlo Cordedda, Nenad Veselinovic, Tore Tollefsen, Peter Bossew
    Abstract:

    In order to optimize the design of a national survey aimed to evaluate Radon exposure of children in schools in Serbia, a pilot study was carried out in all the 334 primary schools of 13 municipalities of Southern Serbia. Based on data from passive measurements, rooms with annual Radon Concentration >300 Bq/m3 were found in 5% of schools. The mean annual Radon Concentration weighted with the number of pupils is 73 Bq/m3, 39% lower than the unweighted 119 Bq/m3 average Concentration. The actual average Concentration when children are in classrooms could be substantially lower. Variability between schools (CV = 65%), between floors (CV = 24%) and between rooms at the same floor (CV = 21%) was analyzed. The impact of school location, floor, and room usage on Radon Concentration was also assessed (with similar results) by univariate and multivariate analyses. On average, Radon Concentration in schools within towns is a factor of 0.60 lower than in villages and at higher floors is a factor of 0.68 lower than ground floor. Results can be useful for other countries with similar soil and building characteristics.

  • seasonal indoor Radon Concentration in fyr of macedonia
    Radiation Measurements, 2011
    Co-Authors: Zdenka Stojanovska, Peter Bossew, Zora S žunic, Jovan Januseski, Tore Tollefsen, Mimoza Ristova
    Abstract:

    Abstract This paper presents the results of the seasonal indoor Radon Concentration measurements in dwellings in all regions of the Former Yugoslav Republic (FYR) of Macedonia. The measurements were made in 437 dwellings using CR-39 track detectors over four successive three-month periods (winter, spring, summer and autumn) throughout 2009. The results of analysis of variance showed statistically significant differences between indoor Radon Concentrations in different seasons. The geometric mean values and geometric standard deviations of indoor Radon Concentrations in winter, spring, summer and autumn were obtained to be: 115 Bq m−3 (2.02), 72 Bq m−3 (1.97), 46 Bq m−3 (1.95), 92 Bq m−3 (2.02), respectively. The geometric mean values of spring, summer and autumn to winter ratios were found to be: 0.63 (1.50), 0.40 (1.81), and 0.80 (1.58), respectively. The results of the analysis of the variance showed statistically significant differences among the indoor Radon measurements for the regions in different seasons. The influence of the factors linked to building characteristics in relation to Radon measurements in different seasons was examined. The factors which enable a differentiation into subgroups (significance level p

  • investigations on indoor Radon in austria part 1 seasonality of indoor Radon Concentration
    Journal of Environmental Radioactivity, 2007
    Co-Authors: Peter Bossew, Herbert Lettner
    Abstract:

    In general, indoor Radon Concentration is subject to seasonal variability. The reasons are to be found (1) in meteorological influence on the transport properties of soil, e.g. through temperature, frozen soil layers and soil water saturation; and (2) in living habits, e.g. the tendency to open windows in summer and keep them closed in winter, which in general leads to higher accumulation of geogenic Rn in closed rooms in winter. If one wants to standardize indoor Rn measurements originally performed at different times of the year, e.g. in order to make them comparable, some correction transform as a function of measurement time which accounts for these effects must be estimated. In this paper, the seasonality of indoor Rn Concentration measured in Austria is investigated as a function of other factors that influence indoor Rn. Indoor Radon Concentration is clearly shown to have seasonal variability, with higher Rn levels in winter. However, it is complicated to quantify the effect because, as a consequence of the history of an Rn survey, the measurement season maybe correlated to geological regions, which may introduce a bias in the estimate of the seasonality amplitude.

August Reineking - One of the best experts on this subject based on the ideXlab platform.

  • daily variation of the Radon Concentration indoors and outdoors and the influence of meteorological parameters
    Health Physics, 1994
    Co-Authors: Justin Porstendorfer, Gernot Butterweck, August Reineking
    Abstract:

    Series of continuous Radon measurements in the open atmosphere and in a dwelling, including the parallel measurement of meteorological parameters, were performed over a period of several weeks. The Radon Concentration in indoor and outdoor air depends on meteorological conditions. In the open atmosphere the Radon Concentration varies between 1 and 100 Bq m{sup {minus}3}, depending on weather conditions and time of day. During time periods of low turbulent air exchange (high pressure weather with clear night sky), especially in the night and early morning hours (night inversion layer), the diurnal variation of the Radon Concentration showed a pronounced maximum. Cloudy and windy weather conditions yield a small diurnal variation of the Radon Concentration. Indoors, the average level and the diurnal variation of the indoor Radon Concentration is also influenced by meteorological conditions. The measurements are consistent with a dependence of indoor Radon Concentrations on indoor-outdoor pressure differences. 11 refs., 4 figs.

Inderpreet Kaur - One of the best experts on this subject based on the ideXlab platform.

  • assessment of Radon Concentration and heavy metal contamination in groundwater of udhampur district jammu kashmir india
    Environmental Geochemistry and Health, 2018
    Co-Authors: Ajay Kumar, Sumit Sharma, Rohit Mehra, Priya Kanwar, R Mishra, Inderpreet Kaur
    Abstract:

    Radon Concentration was measured in water samples of 41 different locations from Udhampur district of Jammu & Kashmir, India, by using RAD7 and Smart RnDuo monitor. The variation of Radon Concentration in water ranged from 1.44 ± 0.31 to 63.64 ± 2.88 Bq L−1, with a mean value of 28.73 Bq L−1 using RAD7 and 0.64 ± 0.28 to 52.65 ± 2.50 Bq L−1, with a mean value of 20.30 Bq L−1 using Smart RnDuo monitor, respectively. About 17.07% of the studied water samples recorded to display elevated Radon Concentration above the reference range suggested by United Nation Scientific Committee on the Effects of Atomic Radiations (UNSCEAR). The mean annual effective dose of these samples was determined, and 78.95% samples were found to be within the safe limits set by World Health Organisation (WHO) and European Council (EU). The study revealed good agreement between the values obtained with two methods. Heavy metals (Zn, Cd, Fe, Cu, Ni, As, Hg, Co, Pb and Cr) were determined in water samples by microwave plasma atomic emission spectrometer, and their correlation with Radon content was also analysed.