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

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

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ISSN: 2588-4824

Journal Paper

Paper Information

Journal: Radiation Physics and Engineering Year:621 | Volume: | Issue: Page(s): 1-8

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Title

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

Author(s)

Ijabor Blessing Okeoghene | Omojola Akintayo Daniel | Nwabuoku Augustine Onyema | Omojola Funmilayo Ruth | Issue Writer Certificate

Keywords

Background ionizing radiation (BIR)Q4

global positioning system (GPS)Q4

radionuclideQ4

GraniteQ4

BitumenQ4

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.

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