الرئيسية / الفعاليات العلمية / Radiological and chemical risk assessment from uranium concentrations in groundwater samples collected from Al-Kufa area, Iraq

Radiological and chemical risk assessment from uranium concentrations in groundwater samples collected from Al-Kufa area, Iraq

Ali Abid Abojassim and Hayder Hussan Neama
ABSTRACT
In nature, uranium is composed of three isotopes, including 238U, 235U, and 234U. Emitting alpha
particle leads to radionuclides decay. The aim of this work is to set up a database for uranium
concentrations in groundwater samples collected from Kufa city, Al-Najaf governorate, Iraqi. Twenty
four samples have been examined for detecting the presence of uranium levels using CR-39 detector.
The measured uranium concentrations were used to determine uranium isotopes with their ingested
radiological toxicity risk (annual effective dose to uranium isotopes and excess cancer risk) and
chemical toxicity risk (lifetime average daily dose and hazard quotient) from consumption of the
water samples in the present study. The results show that the average value of uranium
concentrations, uranium isotopes 238U, 235U, and 234U (1.20 ± 0.04) μg/L, (1.48 ± 0.06) Bq/L, (0.069 ±
0.002) Bq/L and (1.49 ± 0.06) Bq/L respectively. Also, it is reached that, the total average of annual
effective dose and excess cancer risk in all regions under study were (0.10 ± 0.004) mSv/y and
(0.31 ± 0.013) × 103 respectively. Moreover, the average value lifetime average daily dose, and
hazard quotient was 0.0389 ± 0.0016 μg/kg.day and, 0.0649 ± 0.0026 respectively. All results of
radiological and chemical risk assessment from uranium concentrations in groundwater samples
collected from Al-Kufa area when used as drinking water were within the global limitations of the
organization International Commission on Radiological Protection (1.9 μg/L; 1 mSv/y and 0.18 mSv/y)
and World Health Organization recommended (0.6 μg/kg/day). Finally, it can be concluded that
uranium concentrations dose not health effect humans according to radiation contents.
Key words | chemical toxicity risk, groundwater, Kufa city, radiological risk, uranium isotopes

 

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