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• W167318631 abstract "The assessment of radiological and chemical risk associated with uranium in hand dug wells, boreholes and river waters samples within oil and gas field communities in Oil Mineral Leases 30 and 26 (OML30 & 26) in Delta state have been carried out using gamma-ray spectroscopy operated on a Canberra 3×3 NaI(TI) detector while the BIR absorbed dose rate from the environment was measured using Geiger Muller (exploranuim GR-135 model) detector. Measured average absorbed dose rate is 1.0mSvyr -1 for the three sources of water examined which is within the permissible limit. Average uranium activity concentrations in the water samples is 7.2±0.8, 5.5±0.7 and 5.5±0.7 Bql -1 for wells, boreholes and river water samples respectively while the mass concentration average values are 324.3±33.9, 221.5±25.4 and 620.4±56.1μgl -1 respectively. These average activity and mass concentrations of the three sources of water sampled was found to be relatively higher compared with control values and the recommended safe limits by various international organizations. The estimated cancer mortality and morbidity risk values are in agreement with other reported values within the country and are well below acceptable standard. The chemical toxicity risk of uranium in the three water sources (well, borehole and river) samples estimated using lifetime average daily dose (LADD) were found to be 8.9, 5.9 and 17.0 μgkg -1 ·day -1 which are above the reference level of 0.6 μgkg -1 ·day -1 . The study revealed that human risk due to uranium content in water supplies that will result from ingestion in the study area may be attributed to chemical toxicity of uranium as heavy metals rather than radiological risk and possible reduction techniques of concentration in water samples were recommended." @default.
• W167318631 created "2016-06-24" @default.
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• W167318631 date "2013-10-09" @default.
• W167318631 modified "2023-09-24" @default.
• W167318631 title "Radiological and Chemical Risk Assessment of Uranium-238 in Well, Borehole and River Waters in Oml 30 and 26 Oil Fields Rural Communities in Delta State, Nigeria." @default.
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