title: Annual intakes of (226)Ra, (228)Ra and (40)K in staple foodstuffs from a high background radiation area in the southwest region of Cameroon.
abstract: Concentrations of naturally occurring radionuclides (226)Ra, (228)Ra and (40)K were determined in five most consumed vegetables in a high-level background radiation area (HLBRA) in the southwest region of Cameroon. A total of 25 foodstuff samples collected from Akongo, Ngombas, Awanda, Bikoué and Lolodorf rural districts were analyzed by gamma spectrometry. The average activity concentration values of (226)Ra, (228)Ra and (40)K were respectively 2.30, 1.50 and 140.40 Bq kg(-1) fresh-weights. The effective dose for individual consumption of the investigated foodstuff types was calculated on an estimated annual intake of such diets in the study area. The estimated total daily effective doses from the ingestion of the investigated foodstuffs for each studied long-life natural radionuclide were respectively 0.41 μSv for (226)Ra, 0.84 μSv for (228)Ra and 0.71 μSv for (40)K. The total annual effective dose was estimated at 0.70 mSv y(-1). (228)Ra (44%) and (40)K (36%) were found to be the main sources for internal irradiation which is very likely due to the specific uptake of these radionuclides by the studied plants.
authors.affiliation: Nuclear Technology Section, Energy Research Laboratory, Institute of geological and Mining Research, Yaoundé, Cameroon. eleabiama2003@yahoo.fr
authors.forename: P
authors.initials: P
authors.lastname: Ele Abiama
authors.forename: G H
authors.initials: GH
authors.lastname: Ben-Bolie
authors.forename: N
authors.initials: N
authors.lastname: Amechmachi
authors.forename: F
authors.initials: F
authors.lastname: Najib
authors.forename: T
authors.initials: T
authors.lastname: El Khoukhi
authors.forename: P
authors.initials: P
authors.lastname: Owono Ateba
mesh_terms: D001417:Background Radiation; D002163:Cameroon; D011197:Potassium Radioisotopes / Q000032:analysis*; D011883:Radium / Q000032:analysis*
chemical_list: D011197:Potassium Radioisotopes; D011883:Radium