ASSESSMENT OF RADON CONCENTRATION AND ASSOCIATED HEALTH IMPLICATIONS IN GROUND WATER AND SOIL AROUND RIRUWAI MINE SITE, KANO STATE, NIGERIA AND ITS ENVIRONS
Abstract
In this study 10 soil and 11 ground water samples were randomly collected, and the 222Rn concentrations were measured using a DURRIDGE RAD7 electronic radon detector. The radon concentration in ground water ranged from 0.53 BqL-1 to 5.13 BqL-1 with a mean value 2.37 BqL-1. The results show that all the groundwater samples collected have 222Rn concentrations below the US EPA Maximum Contaminant Level (MCL) of 11.1 BqL–1 (for states without radon monitoring policy and enhanced indoor air programs). All the ground water samples also have 222Rn concentrations below MCL of 100 BqL–1 recommended by EU. The annual effective dose due to ingestion (Hing) of 222Rn in the groundwater ranged from 0.00386 – 0.03744 mSvyear-1 with a mean value of 0.01706 mSvyear-1. These values are within the ICRP recommended reference level of 1 mSvy–1 for the intake of the radionuclide in water by the general public for a prolonged exposure. The effective radium content, radon mass exhalation rate and alpha index of the soil samples varied from 0.574 – 1.170 Bqkg-1, 0.104 Bqkg-1d-1 – 0,212 Bqkg-1d-1 and 0.00287 – 0.00585 respectively. The alpha index suggests that none of the selected soil samples have a radon mass exhalation that could cause indoor radon concentrations exceeding 200 Bqkg-1. Therefore, it is concluded that the radon concentration in ground water and soil in the study area indicate that the ground water is safe for drinking and it is safe to use the soil as a building material.
References
Abo-Elmagd M. Ahmed Saleh, Afifi G. (2018). ‘Evaluation of radon related parameters in environmental samples from Jazan city, Saudi Arabia’, Journal of Radiation Research and Applied Sciences 11 (2018) 104-110
Asuku, A., Bello, I. A., Njidda, P. A. & Umar, A. (2019). Determination of radon exhalation rate from some selected building materials in Samaru, Zaria-Nigeria, FUDMA Journal of Sciences, Vol. 3 No. 1, pp1-5.
Arabi .A.S, Funtua I.I, B. B. M. Dewu, and Muhammad A. M. (2015), ‘Radiochemistry Background Radiation and Radiological Hazard Associated with Local Building Materials around Zaria, Nigeria’ Radiochemistry Vol. 57, No. 2, pp. 207–212.
Bruzzi L. Righi S., (2006) Natural radioactivity and radon exhalation in building materials used in Italian dwellings. J Environ Radioact 88:158–170
Deepak Verma, M. Shakir Khan and Mohd. Zubair (2012). Assessment of effective Radium content and Radon exhalation rates in soil samples, journal of Radioanal Nuclear Chemistry, DOI: 10.1007/s10967-012-1694-1
Durridge Radon Instrumentation RAD-H2O User Manual (2016). Available online at: https://www.durridge.com/documentation/rad%20H2020%manual.pdf.
European Commission (EC), Radiation Protection Unit. (1999). Radiological protectionprinciples concerning the natural radioactivity of building materials.
Radiation Protection, 112. Ghosh, D., Deb, A., Bera, S., Sengupta, R., & Patra, K. K.(2008).
Fasae K.P (2013) ‘Natural Radioactivity in Locally Produced Building Materials in Ekiti State, Southwestern Nigeria’ Civil and Environmental Research Vol.3, No.11, pp. 99 – 112.
Huda R. Algaim, Rifat M. Dakhil and Isa J. Al-Khalifa (2012). Determination of Radon and Thoron Activity in the Soil By using Solid State Nuclear Track Detectors (SSNTDs), Passive Technique, Advances in Applied Science Research, 3(2): 950-961.
ICRP ‘Protection Against Radon-222 at Home and at Work’, ICRP Publication 65, Ann. ICRP, 1993, vol. 23, no. 2.
Muhammad Attahiru Abdullahi (2017). Assessment of Radiological Hazards around Ririwai Tin Mines, Kano State, North Western Nigeria, a PhD. thesis in Nuclear Physics, Department of Physics Faculty of Physical Sciences Ahmadu Bello University, Zaria.
Nisha Mann, Sushil Kumar, Amit Kumar, R.P. Chauhan and A.K. Garg (2014). Measurement of Radon Exhalation Rates in Soil Samples from Western Haryana, Journal of Applied Physics, 5(2): 56-59.
Oni, E.A., Oni, O.M., Oladapo O.O., Olatunde I.D., and Adediwura F.E. (2016). ‘Measurement of Radon Concentration in Drinking Water of Ado-Ekiti, Nigeria’ Journal of Academia and Industrial Research, Vol. 4 No. 8, pp19-23.
Oni Emmanuel Abiodun and Theophilus Aanuoluwa Adagunodo (2019). ‘Assessment of Radon Concentration in Groundwater within Ogbomoso, SW Nigeria’ J. Phys.: Conf. Ser. 1299 012098 2019.
WHO ‘Guidelines for Drinking Water Quality’, Incorporating First Addendum, vol. 1 Recommendations, WHO, 2016, 3rd ed.
Rafat M. Amin (2015) ‘A study of radon emitted from building materials using solid state nuclear track detectors’ Journal of Radiation Research and Applied Sciences (8) 516-522
Sudhir Mittal, Asha Rani and Rohit Mehra (2016). ‘Estimation of radon concentration in soil and groundwater samples of Northern Rajasthan, India’, Journal of Radiation Research and Applied Sciences, vol 9, pp 125-130.
Tuccimei P, Moroni M, Norcia D (2006) ‘Simultaneous Determination of 222Rn and 220Rn Exhalation rates from Building Materials used in Central Italy with Accumulation Chambers and a Continuous Solid State Alpha Detector: Influence of Particle Size, Humidity and Precursors Concentration’. Appl Radiat Isot 64:254 – 263.
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