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:: Volume 14, Issue 4 (10-2016) ::
Int J Radiat Res 2016, 14(4): 373-377 Back to browse issues page
Radiological risk analysis of sediment from Kutubdia island, Bangladesh due to natural and anthropogenic radionuclides
Q.M. Rashed-Nizam Dr. , M. Rahman , M.K. Tafader , M. Zafar , A.K.M.S.I. Bhuian , R.A. Khan , M. Kamal , M.I. Chowdhury , M.N. Alam
Department of Physics, University of Chittagong, Chittagong-4331, Bangladesh
Abstract:   (2741 Views)

To assess the environmental radioactivity levels and hence to determine the population exposure in Kutubdia Island, Bangladesh the sediment samples were analyzed by using gamma ray spectrometry. In those sediment samples the average activity concentration of natural radionuclides 238U, 232Th and 40K were found 15.39±1.67, 38.35±0.76 and 475.51±21.15 Bq/kg respectively. The activity concentration of 238U and 232Th were less than the world average. But the activity concentration of 40K was higher than the world average values. These results were used to calculate the radiological hazard parameters like radium equivalent activities (Raeq), representative level index (Iγr). Due to natural radionuclides in sediment, the effective annual outdoor dose in the study area was 0.07 mSv; which is within the accepted range of 0.07 mSv. The average value of radium equivalent activities (Raeq) and representative level index (Igr) were found to be 128.03±12.08 Bq/Kg and 0.96±0.09 Bq/Kg which were greater than the world average. The anthropogenic radionuclide 137Cs was also found in few samples. The average activity concentration of 137Cs was 1.64±0.20 Bq/kg which is lower than the world average. The obtained experimental data of this research work would be useful to assess the population exposure from radionuclides in sediment as well as base line data of natural radioactivity in this island.

Keywords: Keywords: Natural radionuclides, HPGe gamma-spectrometry, radium equivalent activity, representative level index, annual effective dose.
Full-Text [PDF 707 kb]   (552 Downloads)    
Type of Study: Reviews and Perspectives | Subject: Radiation Biology
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Rashed-Nizam Q, Rahman M, Tafader M, Zafar M, Bhuian A, Khan R, et al . Radiological risk analysis of sediment from Kutubdia island, Bangladesh due to natural and anthropogenic radionuclides. Int J Radiat Res. 2016; 14 (4) :373-377
URL: http://ijrr.com/article-1-1824-en.html

Volume 14, Issue 4 (10-2016) Back to browse issues page
International Journal of Radiation Research
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