Radiation hazards from granite and bitumen in construction material site in Aniocha South Local Government Area of Delta State, South-South Nigeria

Ijabor, Blessing Okeoghene; Omojola, Akintayo Daniel; Nwabuoku, Augustine Onyema; Omojola, Funmilayo Ruth

doi:10.22034/rpe.2022.342868.1090

Document Type : Research Article

Authors

¹ Department of Science Laboratory Technology, Delta State Polytechnic, Ogwashi-Uku, Delta State, Nigeria

² Radiology Department, Medical Physics Unit, Federal Medical Centre Asaba, Asaba, Delta State, Nigeria

³ Department of Physics, Delta State University, Abraka, Delta State, Nigeria

⁴ Department of Cancer Biology and Therapy, University of Central Lancashire, Preston, United Kingdom

https://doi.org/10.22034/rpe.2022.342868.1090

Abstract

The study is aimed at measuring the outdoor background ionizing radiation (BIR), the absorbed dose rate (ADR), the annual effective dose (AED) and excessive lifetime cancer risk (ELCR) at four sites in the Aniocha South local government area (LGA) of Delta State, denoted as A-D. The study was performed using a calibrated Geiger-Muller (GM) detector (Radiation Alert Inspector) as well as a geographic positioning system (GPS) to determine the longitude and latitude of each site. The average (range) outdoor BIR, ADR, and AED were 0.021±0.01 (0.01-0.04) mR/hr, 181.6±77.7 (60.9-322.8) nGy/hr, and 0.22±0.10 (0.07-0.40) mSv/yr, respectively. Among the processing sites, the average AED for granite, bitumen, and staff residential areas were 0.31, 0.12, and 0.17 mSv/yr, while surface measurements at the "burnt stone" had the highest AED (0.41 mSv/yr). ADR and AED were both considerably higher than the world average of 59 nGy/hr and 0.07 mSv/yr. The average effective lifetime cancer risk (ELCR) (0.77×10^-3) was higher compared to the world average of (0.25×10^-3), with the highest in the granites. The ELCR risk band indicated a concern for increased cancer risk. Educating the public about actions to reduce their exposure to environmental carcinogens is necessary.

Highlights

Granite and bitumen from different geographical location have different radiation levels.
Most workers in construction/material deposit sites are not aware of the impact of ionizing radiation.
The ADR was 3 times higher than the world average.
The effective lifetime cancer risk (ELCR) was above the acceptable risk band (10⁻⁶to 10⁻⁴).

Keywords

20.1001.1.26456397.2023.4.2.1.7

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Radiation Physics and Engineering

Radiation hazards from granite and bitumen in construction material site in Aniocha South Local Government Area of Delta State, South-South Nigeria

References

References

Volume 4, Issue 2
March 2023
Pages 1-8

Radiation hazards from granite and bitumen in construction material site in Aniocha South Local Government Area of Delta State, South-South Nigeria

References

References

Volume 4, Issue 2March 2023Pages 1-8

Volume 4, Issue 2
March 2023
Pages 1-8