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IARC, International Agency for Research on Cancer (1988): Radon and Manmade Mineral Fibres. Monographs on the Evaluation of Carcinogenic Risks to Humans, vol. 43. IARC, Lyon. ISBN 92-832-1243-6.

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Article

Outdoor Radon Concentration in the Township of Ado-Ekiti Nigeria

1Department of Science Technology, Federal Polytechnic, P.M.B 5351, Ado-Ekiti, Ekiti State, Nigeria

2Department of Physics and Electronics, Adekunle Ajasin University, P.M.B 001, Akungba Akoko, Ondo State, Nigeria


Journal of Atmospheric Pollution. 2015, Vol. 3 No. 1, 18-21
DOI: 10.12691/jap-3-1-4
Copyright © 2015 Science and Education Publishing

Cite this paper:
OJO T.J, AJAYI I.R. Outdoor Radon Concentration in the Township of Ado-Ekiti Nigeria. Journal of Atmospheric Pollution. 2015; 3(1):18-21. doi: 10.12691/jap-3-1-4.

Correspondence to: OJO  T.J, Department of Science Technology, Federal Polytechnic, P.M.B 5351, Ado-Ekiti, Ekiti State, Nigeria. Email: talk2ojotj@yahoo.com

Abstract

Solid State Nuclear Track Detectors (CR-39) were used for the measurement of outdoor 222Radon concentration in 30 locations in the township of Ado-Ekiti Nigeria. The annual effective dose of radon and its progenies to the residents was calculated from the results of the measurement. The concentrations of radon varied from 2.22 to 92.50 Bq m-3 with an overall mean of 29.57 Bq m-3. The annual absorbed dose was found to range from 0.09 to 3.81 mSv y-1 with an average of 1.18 mSv y-1. The estimated annual effective dose to lung ranged from 0.22 to 9.14 mSv y-1 with an average of 2.88 mSv y-1. The values measured for Radon concentration were found to fall below the upper limit of the ICRP reference level.

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