Journal of Atmospheric Pollution
ISSN (Print): 2381-2982 ISSN (Online): 2381-2990 Website: Editor-in-chief: Ki-Hyun Kim
Open Access
Journal Browser
Journal of Atmospheric Pollution. 2015, 3(1), 18-21
DOI: 10.12691/jap-3-1-4
Open AccessArticle

Outdoor Radon Concentration in the Township of Ado-Ekiti Nigeria

OJO T.J1, and AJAYI I.R2

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

Pub. Date: April 14, 2015

Cite this paper:
OJO T.J and 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


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.

detector radon outdoor absorbed dose effective dose

Creative CommonsThis work is licensed under a Creative Commons Attribution 4.0 International License. To view a copy of this license, visit


[1]  Asumadu-Sakyi, A.B. (2011): Preliminary studies on geological fault location using solid state nuclear track detector. Research Journal of Environmental and Earth Science, 3(1):24-31.
[2]  Chauhan RP (2010): Indian Journal of Pure & Applied Physics, 48, 470-472.
[3]  Darby S, Whithly E, Silcock P, Thakrar B, Green M, lomas P (1998): Risk of lung cancer associated with residential radon exposure in South-West England. A case control study.Br J Cancer. 78:394-408
[4]  Gupta M, Mahur AK, Sonkawade RG, Verma KD ( 2011): Advances in Applied Sciences Research, 2(5), 421-426.
[5]  Gusain GS, Prasad G, Prasad Y, Ramola R ( 2009): Radiation Meas. 4, 1032-1035.
[6]  ICRP, International Commission on Radiological Protection (1993): Protection against Radon-222 at home and a Work” ICRP Publication 65, Ann. ICRP 23 (2).
[7]  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.
[8]  ICRP, International Commission on Radiological Protection (2009): Statement on Radon, ICRP Ref. 00/902/09.
[9]  Kumar R, Prasad R (2000): Indian Journal of Pure and Applied Physics, 45, 116-118.
[10]  Kumar R, Mahur AK, Jojo PJ, Prasad R (2007): Indian Journal of Pure and Applied Physics, 45, 877-879.
[11]  Rahman S, Faheem M, Rehman S, Matiullah (2006): Radon awareness survey in Pakistan, Radiation Protection Dosimetry 121:333-6
[12]  Kumat A, Kumar A, Singh S (2012): Advances in the Applied Sciences Research, 3(5), 2900-2905.
[13]  Kumar R, Mahur AK, Singh H, Sonkawade RG, Swarup R ( 2010): Indian Journal of Pure and Applied Physics, 48, 802-804
[14]  Mehra R, Singh S, Singh K (2006): Indoor and Built Environment, 15(5), 499-505.
[15]  Sharma N, Sharma R, Virk H.S (2011): Advances in the Applied Sciences Research, 2(3), 186-190.
[16]  Singh S, Malhotra R, Kumar J, Singh L (2001): Radiation Meas, 34, 505-508.
[17]  UNSCEAR, United Nation Scientific Committee on the effect of Atomic Radiation (2000): Exposure due to Natural Radiation Sources, United Nation, New York.
[18]  USEPA Environmental Protection Agency, (2004): 402-K02-006. A Citizen’s Guide to radon: The Guide to Protecting Yourself and Your Family from Radon. US EPA, Washington, DC.
[19]  WHO, World Health Organization (2009): Radon and Cancer (