Journal Article10.1007/S00003-021-01332-2
Excess lifetime cancer risk and committed effective dose associated with dietary exposure to radioactivity of natural origin from mining areas
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TL;DR: This study showed that both radionuclide-specific and cumulative excess cancer risks (5.5 × 10–6) were all within the protective range, and Radionuclides-specific excess cancer risk was found to increase in this order.
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Abstract: Food safety concerns associated with radiotoxicity risks among consumers are widespread in areas with human activities such as mining. Therefore, the study was carried out to determine natural radioactivity levels in total diets in an area with excessive mining activities. Using validated models, the committed effective dose and excess cancer risk were calculated for consumers based on the activity concentration, food intake, exposure frequency, exposure duration, dose, and risk conversion factors. In addition, the percentage contribution of each radionuclide to the committed effective dose was determined. The results showed that the levels of activity concentration of 226Ra (0.17 Bq/kg), 228Ra (0.10 Bq/kg), 228Th (0.08 Bq/kg) and 40K (33.2 Bq/kg) were below global reference values (0.5–80 Bq/kg). The corresponding order of the total committed effective dose for age groups was: 0.179 mSv/year (adults) < 0.485 mSv/year (children) < 0.571 mSv/y (adolescents) < 0.634 mSv/year (toddlers) and exceeded the typical level (0.3 mSv/year) with the exception of adults. 40K in diets from this study was the highest contributor (48%) to committed effective dose, followed by 228Ra (35%), 226Ra (16%) and 228Th (1%) respectively. Radionuclide-specific excess cancer risk was found to increase in this order: 228Th (7 × 10–8) < 40K (3 × 10–7) < 226Ra (2 × 10–6) < 228Ra (3 × 10–6). This study showed that both radionuclide-specific and cumulative excess cancer risks (5.5 × 10–6) were all within the protective range (1 × 10–4–1 × 10–6).
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Citations
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Radiation exposure in adult and pediatric patients with osteogenesis imperfecta
TL;DR: Pediatric patients had significantly more radiograph studies per year than adults and greater average yearly effective radiation doses, compared with adults.
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Radium and Uranium Concentration in Some Plants in Iraq
Nidhala Hassan Kadim,Basim Khalaf Rejah,Ruwiadah Tarik Mahdi,Ayaat Methaq Khalaf +3 more
- 01 Feb 2019
Abstract: In this study, the concentration of radium and uranium in the samples radish leaves, radish stalk, onion leaves, onion stalk and garlic fruits were grown in arable soil in the Botanical Garden in the College of Science for women, and garlic in special plates, the soil was taken from the above at the beginning of November 2016 was studied by using CR-39 nuclear track detectors. The radium and uranium concentration varied from 0.023 to 0.052 and from 23.13 to 52.68 Bq/kg with an average value of 0.037 and 37.58 Bq/kg respectively. The maximum value of radon concentration was 0.052 Bq/kg in fruits of garlic sample, while the minimum value was 0.023 Bq/kg in radish leaves. The values of the radium and uranium concentrations obtained from this study are largely consistent with the other study [15].
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Naturally occurring radionuclide transfer from soil to vegetables in some farmlands in Ghana and statistical analysis
TL;DR: The activity concentration in fertilized and unfertilized soil exhibited slightly positively skewed, negatively skewed, leptokurtic, and platykurtic distribution in terms of skewness and kurtosis and is statistically insignificant at 5% level of significance using independent t-test.