Phosphogypsum is a waste produced by the phosphate fertilizer industry. Although phosphogypsum is mainly calcium sulphate dihydrate, it contains elevated levels of impurities, which originate from the source phosphate rock used in the phosphoric acid production. Among these impurities, radionuclides from 238U and 232Th decay series are of most concern due to their radiotoxicity. Other elements,...

Following the increasing demand of coal for power generation, activity concentrations of primordial radionuclides were determined in Nigerian coal using the gamma spectrometric technique with the aim of evaluating the radiological implications of coal utilization and exploitation in the country. Mean activity concentrations of 226Ra, 232Th, and 40K were 8.18±0.3, 6.97±0.3, and 27.38±0.8 Bq kg-1...

Assessment of public exposure to background radiation was performed in Manyoni, Tanzania address concerns following the discovery uranium deposits their neighborhoods. Results show that highest concentrations radionuclides are 112, 95 and 463 Bq.kg-1 for 226Ra, 232Th 40K, respectively. The annual effective dose is 2.91 mSv.y-1 with a mean value 1.29 mSv.y-1. Authorities may use these results as...

Background: Many radioactive compounds may be released into the environment and hence into the drinking water supplies due to the human activities. Radionuclides can also enter the food chain if the contaminated water is used for drinking or irrigation purposes. Objective: To estimate the annual effective dose of natural radioactive materials like 226Ra and 40K in drinking water of wells in Zan...

Specific activites of natural (40K, 226Ra and 40Th) anthropogenic (137Cs) radionuclides in 30 glutinous rice samples bought from some local retailers department stores Songkhla Province have been measured analyzed. Experiment results were carried out by using a high-purity germanium (HPGe) detector gamma spectrometry analysis system at Radiation Laboratory Thailand Institute Nuclear Technology ...

background: many radioactive compounds may be released into the environment and hence into the drinking water supplies due to the human activities. radionuclides can also enter the food chain if the contaminated water is used for drinking or irrigation purposes. objective: to estimate the annual effective dose of natural radioactive materials like 226ra and 40k in drinking water of wells in zan...

Background: In this study, the health risk associated with three types of drinking waters (fissure, underground treated and surrounding waters) from two mines in South Africa were assessed. Materials and Methods: The measurement of the radionuclides concentration was carried out by liquid scintillation counter and alpha spectrometer. The estimated radiological risk pose to the people consuming ...

Exploration of a landlocked cenote on Lifou (Loyalty Islands) revealed 37 shells of the cephalopod Nautilus macromphalus Sowerby, 1849, in saltwater on the cenote floor, approximately 40 m below the water surface. The occurrence of these shells is unusual because N. macromphalus is restricted to the open marine waters surrounding the island. All of the shells are mature, and nearly all of them ...

background: presently, the british-american tobacco company (bat) located in ibadan, oyo state is the only tobacco producing company in nigeria accounting for about nine different brands of cigarette tobacco smoked in the country. the tobacco leaves are produced from some farmlands located in oke-ogun area of ibadan where special fertilizers are used for the growing of the tobacco leaves. the u...

Background: Presently, the British-American Tobacco Company (BAT) located in Ibadan, Oyo State is the only tobacco producing company in Nigeria accounting for about nine different brands of cigarette tobacco smoked in the country. The tobacco leaves are produced from some farmlands located in Oke-Ogun area of Ibadan where special fertilizers are used for the growing of the tobacco leav...