Environmental impact of natural radionuclides from a coal-fired power plant in Spain. Radiat Prot Dosim
ABSTRACT This paper is a study of the radiological impact of a coal-fired power plant in Spain. Activity concentrations of six natural radionuclides were determined in coal, ash, mine wastes and sediments by gamma-ray spectrometry. The average activity concentrations of (238)U, (226)Ra,(224) Ra, (210)Pb, (232)Th and (40)K in coal were 24, 30, 28, 41, 23 and 242 Bq kg(-1) and in ash were 103, 128, 101, 124, 88 and 860 Bq kg(-1), respectively. The enrichment factor, radium equivalent activity and alpha index in the ash sample have been estimated. For the five waste pile samples, the absorbed dose rate was higher than the world average dose rate (60 nGy h(-1)). The dependence of radionuclide concentration on the grain size of nine sediments was also studied. The analysis of the radionuclides in waste and sediment samples will demonstrate the distribution and mobility of these elements through the environment, where a potential risk of contamination can be detected.
- Journal of Environmental Radioactivity 11/2014; 137:125–129. DOI:10.1016/j.jenvrad.2014.06.021 · 2.48 Impact Factor
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ABSTRACT: To evaluate the concentration of naturally occurring radioactive material particularly, uranium concentration in fly ash, samples were collected from Guru Nanak Dev Thermal Plant, Bathinda, Punjab, India and Suratgarh Super Thermal Power Station, Suratgarh, Rajasthan, India during 2010 to 2012. Samples were processed using ICP-MS (Inductively coupled plasma – mass spectrometry) with multi-element standards. A maximum and minimum concentration of uranium (4.99 mg.kg-1 and 0.63 mg.kg-1) was recorded in fly samples collected from SSTP, Suratgarh. Further, results were found to be very alarming and special action may be taken to prevent the exploration of uranium to the human being, live stocks and natural vegetations. However, this was a little attempt, and further study in this direction is recommended. Concentration of cesium was found in permissible level as data given by WHO but Uranium concentration is high in those area.
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ABSTRACT: In this study, the aerosol activity concentrations of (210)Pb at 28 Canadian radiological monitoring stations from 2009 to 2013 were analyzed. The results show that the ratio of (210)Pb winter average concentration to summer average concentration increases with increasing latitude. This could be used to evaluate the transport of pollutants to the Arctic region such as the Arctic haze from Eurasia through long-range atmospheric transport during winter. Based on 12 years of monitoring results from the Yellowknife station that includes both (210)Pb and (212)Pb concentrations, the study confirms that the seasonal distribution of (210)Pb to (212)Pb activity concentration ratios has a significant peak in winter and a relatively low value in summer, which can be used as an indicator of the air mass flow to the Arctic. The period dominated by long-range aerosol transport and Arctic haze was estimated by fitting a Gaussian distribution function to the peak values of this ratio in winter. A peak width parameter of full width at half maximum (FWHM) allows a year by year estimate of the period of influence by long-range transport of aerosols, and this varied between 67 and 88 days in this study. The fitted Gaussian peak also shows that the season of the continental influenced air mass in Yellowknife usually starts in mid-to-late November and ends in mid-to-late April. Thus, the (210)Pb to (212)Pb ratio distributions may enable the determination of periods dominated by long-range aerosol transport and the scale of the Arctic haze at different latitudes. Crown Copyright © 2014. Published by Elsevier Ltd. All rights reserved.Journal of Environmental Radioactivity 01/2015; 141C:123-129. DOI:10.1016/j.jenvrad.2014.12.008 · 2.48 Impact Factor