Article (Scientific journals)
Assessment of natural radioactivity levels and the associated radiological hazards in some building materials from Mayo-Kebbi region, Chad
Penabei, S.; Bongue, D.; Maleka, P. et al.
2018In Radioprotection, 53 (4), p. 265–278
Peer Reviewed verified by ORBi
 

Files


Full Text
radiopro180015.pdf
Publisher postprint (1.97 MB)
Request a copy

All documents in ORBi are protected by a user license.

Send to



Details



Keywords :
building materials; gamma-ray spectrometry; natural radioactivity; radiation hazards; excess lifetime cancer risk; Mayo-Kebbi region; Chad
Abstract :
[en] In order to assess the levels of natural radioactivity and the associated radiological hazards in some building materials of the Mayo-Kebbi region (Chad), a total of nineteen samples were collected on the field. Using a high resolution g-ray spectrometry system, the activity concentrations of radium (226Ra), thorium (232Th) and potassium (40K) in these samples have been determined. The measured average activity concentrations range from 0.56 ± 0.37 Bq kg 1 to 435 ± 7 Bq kg 1, 1.3 ± 0.6 Bq kg 1 to 50.6 ± 1.1 Bq kg 1 and 4.3 ± 2.0 Bq kg 1 to 840 ± 9 Bq kg 1, for 226Ra, 232Th and 40K, respectively. The highest 226Ra average activities is found in soil brick samples of Zabili. The highest mean value of 232Th and 40K concentrations are found in soil brick samples of Madajang. The activity concentration and the radium equivalent activity (Raeq) have been compared to other studies done elsewhere in the world. Their average values are lower than most of those of countries with which the comparison has been made. Were also evaluated, the external radiation hazard index, the internal radiation hazard index, the indoor air absorbed dose rate , the outdoor air absorbed dose rate, the activity utilization index, the annual effective dose, the annual gonadal dose equivalent, the representative level index, as well as, the excess lifetime cancer risk. In accordance with the criterion of the Organization for Economic Cooperation and Development, our results show that soil brick samples of Zabili and Madajang increases the risk of radiation exposure, thereby the possibility of developing cancer by people living in this environment. Based on these findings, brick samples from Zabili and Madajang are not recommended for construction purposes. All other sample materials have properties that are acceptable for use as building materials in terms of radiation hazard.
Disciplines :
Physics
Author, co-author :
Penabei, S.;  Centre for Atomic Molecular Physics and Quantum Optics (CEPAMOQ), University of Douala, P.O. Box 8580 Douala, Cameroon
Bongue, D.
Maleka, P.
Dlamini, T.
Saïdou
Guembou Shouop, Cébastien Joel  ;  Université de Liège - ULiège > Doct. sc. (phys. - paysage)
Halawlaw, Y.I.
Ngwa Ebongue, A.
Kwato Njock, M.G.
Language :
English
Title :
Assessment of natural radioactivity levels and the associated radiological hazards in some building materials from Mayo-Kebbi region, Chad
Publication date :
July 2018
Journal title :
Radioprotection
ISSN :
0033-8451
eISSN :
1769-700X
Publisher :
EDP Sciences, France
Volume :
53
Issue :
4
Pages :
265–278
Peer reviewed :
Peer Reviewed verified by ORBi
Available on ORBi :
since 18 January 2019

Statistics


Number of views
95 (2 by ULiège)
Number of downloads
0 (0 by ULiège)

Scopus citations®
 
9
Scopus citations®
without self-citations
5
OpenCitations
 
9

Bibliography


Similar publications



Contact ORBi