International Journal of Science and Technology

International Journal of Science and Technology>> Volume 7, Number 7, July 2017

International Journal of Science and Technology


Preliminary Study of Natural Radioactivity and Radiological Risk Assessment in Some Mineral Bottledwater Produced in Cameroon

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Author(s) M.M. Ndontchueng; A. Simo; E.J.M. Nguelem, J. F Beyala; D, Kryeziu
On Pages 372-377
Volume No. 3
Issue No. 12
Issue Date December, 2013
Publishing Date December, 2013
Keywords HPGe Detector, radioactivity, secular equilibrium, bottled water


Abstract


The aim of this work was to present an overview of natural radioactivity and its associated health risk in some mineral bottled water produced in Cameroon by means of using High-Purity Germanium based gamma spectrometry techniques. The water samples were firstly chemically treated by adding nitric acid and then pre-concentrated further by evaporating them up to a certain level. The water residues were transferred to small cylindrical containers and were kept sealed in order to ensure secular equilibrium between U-238, Th-232 and their daughter products. The calculated activity concentration for 226Ra (U-series) and 228Ra (Th-series) were used to estimate the annual effective doses for different age groups infants (age 1-2 years), children (age 7-12 years) and adults (age =17years) by taking into account the ingested dose conversion factors obtained from the International Commission on Radiological Protection (ICRP) as well as their yearly average bottled water consumption. The evaluated annual effective dose due to life-long consumption of water for different group ages where below the recommended values by WHO, IAEA and UNSCEAR. The paper presents the overview of the technique used and the summary of findings from this survey.

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