Radiological Assessment of Drinking Water of the Chittagong Region of Bangladesh

Alam, M.N.; Chowdhury, M. I.; Kamal, Masud; Ghose, S.; Islam, Nazrul; Anwaruddin, M.

doi:10.1093/oxfordjournals.rpd.a032626

Cited by 75 publications

(31 citation statements)

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“…The mean concentrations of 226 Ra obtained in this study are larger than the values of 22 mBq L −1 for Istanbul (Karahan et al 2000) and 19 mBq L −1 for Eastern Black Sea (Cevik et al 2006). Alam et al (1999) estimated the effective dose due to the intake of natural radionuclides from drinking water as below:…”

Section: Resultsmentioning

confidence: 59%

Assessment of environmental radioactivity for Batman, Turkey

Damla

Çevik

Kobya

et al. 2008

Environ Monit Assess

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The province of Batman, located in southern Anatolia, has a population of approximately 500,000. To our knowledge, there exists no information regarding the environmental radioactivity in this province. Therefore, gamma activity measurements in soil, building materials and water samples and an indoor radon survey have been carried out in the Batman province. The mean activity concentrations of the natural radionuclides (226Ra, 232Th and 40K) and a fission product (137Cs) were 35+/-8, 25+/-10, 274+/-167 and 12+/-7 Bq kg(-1), respectively, in the soil samples. The concentrations of 226Ra, 232Th and 40K in the selected building materials ranged from 18 to 48 Bq kg(-1), 8 to 49 Bq kg(-1) and 68 to 477 Bq kg(-1), respectively. All the calculated radium equivalent (Raeq) activity values of the building material samples are lower than the limit of 370 Bq kg(-1), equivalent to a gamma-dose of 1.5 mSv year(-1). The activity concentrations of 226Ra, 232Th and 40K in tap waters collected from the study area were determined with mean specific activity concentrations of 42+/-15, 35+/-9 and 524+/-190 mBq L(-1), respectively. Indoor radon measurements were made at 95 dwellings in Batman using a CR-39 detector. The radon concentration levels were found to vary from 23 to 145 Bq m(-3). The arithmetic mean of the measured radon concentration levels was found to be 84 Bq m(-3) with a standard deviation value of 23 Bq m(-3). The measurement results obtained in this study did not significantly differ from those taken in other parts of the country. The data generated in this study can be used to determine whether the Batman province is in a normal or high background radiation area and provides a valuable database for future estimations of the impact of radioactive pollution.

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Section: Resultsmentioning

confidence: 59%

Assessment of environmental radioactivity for Batman, Turkey

Damla

Çevik

Kobya

et al. 2008

Environ Monit Assess

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“…It was estimated by Alam et al (1999) that the effective dose that an individual is exposed to due to the intake of natural radionuclides from water as shown below:…”

Section: Resultsmentioning

confidence: 99%

Radiochemical characterization of mineral waters in the Eastern Black Sea Region, Turkey

Kobya

Damla

Çevik

et al. 2011

Environ Monit Assess

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This study has evaluated the levels of natural radionuclides and chemical components of mineral waters in the Eastern Black Sea Region (Turkey). The mean activity concentrations of (226)Ra, (232)Th, (137)Cs, (40)K, gross alpha and gross beta were found as 129, 33, 28, 714, 125 and 170 mBq L(-1), respectively. Due to consumption of mineral waters, the radiological impact of them on the inhabitants was calculated by taking the annual intake into account through ingestion of aforementioned radionuclides. The estimated effective doses from mineral water were found to be 13.20 μSv year(-1) ((226)Ra), 2.74 μSv year(-1) ((232)Th), 0.13 μSv year(-1) ((137)Cs) and 1.62 μSv year(-1) ((40)K). The overall contribution of these radionuclides to the committed effective dose from a year's consumption of mineral water in the region is therefore estimated to be only 17.69%, which is in concordance with the recommended WHO value (100 μSv year(-1)). The chemical analysis results showed that these waters contain Na, Al, P, Cl, K, Ca, V, Mn, Fe, Ni, Cu and Zn elements. These values were evaluated and compared with the internationally verified values. This study provides important information for consumers and authorities because of their internal radiochemical exposure risk from mineral water intake.

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“…As shown in the Table, 226 Ra activity concentrations are higher than the values from Pakistan, Sudan, and Greece, but lower than the values from Egypt, Finland, Italy, Sweden, and Brazil (ElArabi et al, 2006;Osman et al, 2008;Salonen, 1994;Sgorbati and Forte, 1997;Karamanis et al, 2007;Isam Salih et al, 2002;Godoy and Godoy, 2006;Fatima et al, 2006). Alam et al (1999) estimated the effective dose due to the intake of natural radionuclides from drinking water as shown below:…”

Section: Resultsmentioning

confidence: 99%