Natural radioactivity in urban soils of mining centers in Armenia: Dose rate and risk assessment

Belyaeva, Olga; Pyuskyulyan, Konstantin; Movsisyan, Nona; Saghatelyan, Armen; Carvalho, Fernando P.

doi:10.1016/j.chemosphere.2019.03.057

Cited by 54 publications

(18 citation statements)

References 23 publications

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“…These readings were afterwards converted to standard unit of Bq kg −1 using the existing conversion factor in literature. That is, for 226 Ra; 1 ppm = 12.35 Bq kg −1 ; 232 Th; 1 ppm = 4.06 Bq kg −1 and 40 K; 1% = 313 Bq kg −1 according to 29 , 30 . The measurement on each traverse was concluded before embarking on the measurements on the other traverses.…”

Section: Methodsmentioning

confidence: 99%

“…A number of 7 stations were surveyed on each traverse and 21 stations for all the 3 traverses. However, according to literature 2 , 30 , 31 the formula for estimating the activity concentrations of each radionuclide is presented below as where, A s = the activity concentration, C a = the net gamma counting rate in counts per second, = the detector efficiency of the specific gamma-ray, P r = the probability of gamma emission of energy € of the photopeak and M s = the mass of the sample in kilogram.…”

Section: Methodsmentioning

confidence: 99%

“…The radium equivalent activity represents a weighted sum of activities of 226 Ra, 232 Th and 40 K. It is based on the fact that 370 Bq kg −1 of 226 Ra, 259 Bq kg −1 of 232 Th, and 4810 Bq kg −1 of 40 K would produce the same gamma radiation dose rate. The equation for determining the radium equivalent activity is presented in ( 2 ), where each component of the equation is explained in 1 , 26 – 30 , 32 …”

Section: Estimation Of Radiological Parametersmentioning

confidence: 99%

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Estimation of activity concentrations of radionuclides and their hazard indices in coastal plain sand region of Ogun state

Adewoyin

Maxwell

Akinwumi

et al. 2022

Sci Rep

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Assessment of natural background radionuclides emanating from the subsurface geological features was carried out with the use of gamma-ray spectrometry at various locations at one of the secondary school in Canaan land, Ota, Ogun State. The activity concentrations of 226Ra, 232Th and 40K were revealed to be 12.66 ± 0.76–42.33 ± 1.37, 44.96 ± 1.41–128.70 ± 1.56, 31.30 ± 1.18–453.85 ± 2.43 Bq kg−1 respectively. The mean value of 232Th reported higher than the world reference standard of 50 Bq kg−1. Moreover, the stations closest to the school’s laboratory were noticed to be prone to more gamma radiations than the other buildings in the school. Similarly, the results of the radiological parameters estimated varied between 86.04–243.7 Bq kg−1, 40.02–115.4 nGy h−1, 0.049–0.142 mSv y−1 and 0.232–0.658 for Raeq, D(out), AEDE and Hex, respectively. Although, the results of the radiological parameters did not exceed the world safe limits, higher values of these parameters were reported at some stations closer to the school laboratory. It can be concluded that the school laboratory is prone to more gamma radiation than the class rooms and the administrative block. Therefore, the laboratory instructors and staff, who spend longer time in the laboratory, are more liable to the health risk that could result from years of exposure to gamma radiation in the laboratory.

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Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Section: Estimation Of Radiological Parametersmentioning

confidence: 99%

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Estimation of activity concentrations of radionuclides and their hazard indices in coastal plain sand region of Ogun state

Adewoyin

Maxwell

Akinwumi

et al. 2022

Sci Rep

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“…Impact on soil. 211, [236][237][238][254][255][256][257][258][259][260][261] It is known that the drilling process directly affects the soil because it causes large impacts in the ground, and the drilling machines may cause leaking the fuel through the pores of the soil, as well as the oil residues. 242,[258][259][260][261] Then, radionuclides are transferred to the soil and then to the plants and living cells.…”

Section: The Main Forms Of Petroleum Pollution Tenormsmentioning

confidence: 99%

Concentrations of TENORMs in the petroleum industry and their environmental and health effects

Ali

Zhao

et al. 2019

RSC Adv.

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“…The radioactivity levels and environmental problems surrounding uranium mines have attracted worldwide attention. Extensive research has been conducted on the characteristics and mobilization of radionuclides in soil, plants, and water, as well as on the transfers between these components at different uranium mining sites worldwide [4][5][6]. For example, the highest uranium concentration in water occurred at the beginning of spring in the former Mondego Sul uranium mine (Portugal) because the highest water flow caused leaching of uranium from secondary minerals to be released into the water [7].…”

Section: Introductionmentioning

confidence: 99%

Determination of radionuclide concentration and radiological hazard in soil and water near the uranium tailings reservoir in China

Liu

Wei-bo

Gao

et al. 2021

Environmental Pollutants and Bioavailability

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Radioactive levels and radiological hazard assessment associated with exposure to radionuclides from uranium tailings were investigated in this study. Herein, the concentrations of 238 U, 226 Ra, 232 Th, and 40 K in 36 samples including 25 soil and 11 water samples were measured using a low background HPGe semiconductor detector. The radionuclide concentrations were much lower outside the tailings reservoir than inside the reservoir; however, both exceeded the national average and world average values. The mean concentrations of 238 U, 226 Ra, 232 Th, and 40 K in water samples were higher than the WHO guideline levels. The radionuclide transfer factors showed that the radionuclides in soil of the tailings enter the surrounding water. Additionally, the radiological hazard indices around the reservoir were much higher than the worldwide average. Results suggest that the high level of radiation in the tailings reservoir posed a potential threat to the health of the local residents.

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Natural radioactivity in urban soils of mining centers in Armenia: Dose rate and risk assessment

Cited by 54 publications

References 23 publications

Estimation of activity concentrations of radionuclides and their hazard indices in coastal plain sand region of Ogun state

Estimation of activity concentrations of radionuclides and their hazard indices in coastal plain sand region of Ogun state

Concentrations of TENORMs in the petroleum industry and their environmental and health effects

Determination of radionuclide concentration and radiological hazard in soil and water near the uranium tailings reservoir in China

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