activity concentrations; gamma-ray spectrometry; Natural radionuclides; radiological hazards parameters; soils; statistical analysis; Activity concentration; Gamma rays spectrometers; Gamma rays spectrometries; Health risk assessments; Low background; Natural radioactivity; Radiological hazard; Radiological hazard parameter; Soil sample; Analytical Chemistry; Environmental Chemistry; Water Science and Technology; Waste Management and Disposal; Pollution; Soil Science; Public Health, Environmental and Occupational Health; Health, Toxicology and Mutagenesis
Abstract :
[en] The activity concentrations of natural radionuclides 226Ra, 232Th and 40K in 19 soil samples from Zabili uranium exploration area were measured using a low-background digital gamma-ray spectrometer equipped with broad energy germanium detector. The activity concentrations of 238U, 232Th, and 40K range from 16.5 to 1110.9 Bq.kg−1, 19.45 to 76.97 Bq.kg−1, and 3.28 to 839.5 Bq.kg−1, with their mean values of 478.0, 58.9, and 562.5, respectively. In addition, radiological hazard parameters from the activity concentrations obtained were assessed by estimating radium equivalent activity, external and internal hazard index, indoor and outdoor absorbed gamma dose rate and the corresponding annual effective dose, effective dose rate to different body organs and tissues, and excess lifetime cancer risk. Derived radiological hazard indices have been revised in accordance with relevant national and international legislation and guidelines. The radiological hazard parameter values were found to be above the relevant limit values for soils. In order to investigate the distribution of radionuclides and associated health hazard parameters in the study area, a statistical study was performed.
Disciplines :
Physics
Author, co-author :
Penabei, Samafou; Center for Atomic, Molecular Physics and Quantum Optics (CEPAMOQ), University of Douala, Douala, Cameroon ; Faculty of Medicine and Health Sciences, University of Sherbrooke, Sherbrooke, Canada
Bongue, Daniel; Center for Atomic, Molecular Physics and Quantum Optics (CEPAMOQ), University of Douala, Douala, Cameroon
Eyakifama, Hazou; Department of Physics, Faculty of Science, University of Lomé, Lomé, Togo
Ngwa Ebongue, Alexandre; Faculty of Sciences, University of Douala, Douala, Cameroon
Mistura Bolaji, Ajani; Department of Subatomic Physics, NRF/iThemba LABS, Somerset West, South Africa
Peane, Maleka; Department of Subatomic Physics, NRF/iThemba LABS, Somerset West, South Africa
Guembou Shouop, Cébastien Joel ; Université de Liège - ULiège > Unités de recherche interfacultaires > Art, Archéologie et Patrimoine (AAP) ; University of Douala > Physics
Brigui Olkalé, Jean-Claude; Laboratory of Material Sciences, Environment and Solar Energy (LASMES) of University Felix Houphouët Boigny, Abidjan, Cote d'Ivoire
Yacoub Idriss, Halawlaw; Faculty of Exact and Applied Sciences, Department of Physics, Laboratory of Renewable Energies and Materials, University of N’Djamena, N’Djamena, Chad
Kwato Njock, Moïse Godfroy; Center for Atomic, Molecular Physics and Quantum Optics (CEPAMOQ), University of Douala, Douala, Cameroon
Language :
English
Title :
Health risk assessment and statistical analysis of natural radioactivity in the uranium exploration area of Zabili, Chad
Publication date :
2022
Journal title :
International Journal of Environmental Analytical Chemistry
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