Yerevan soil radioactivity: Radiological and geochemical assessment

Belyaeva, Olga; Movsisyan, Nona; Pyuskyulyan, Konstantin; Sahakyan, Lilit; Tepanosyan, Gevorg; Saghatelyan, Armen

doi:10.1016/j.chemosphere.2020.129173

Cited by 32 publications

(17 citation statements)

References 21 publications

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“…The adequate lead shielding coupled to 8K multichannel analyzer in the laboratory Radiation Safety Division, Indira Gandhi Centre for Atomic Research, Kalpakkam was employed were investigated for present work. For reference, the calibration is made in the device using Uranium Ore Sample (RGU-1), Thorium Ore Sample (RGTh-1) and a Potassium Sample (RGK-1) obtained from IAEA (International Atomic Energy Agency) (Ramasamy et al, 2009, Senthilkumar et al, 2010and Belyaeva et al, 2021. Based on the background radiation spectrum of three radionuclides itself were calculated Below detectable limit (BDL).…”

Section: Sampling and Sample Preparationmentioning

confidence: 99%

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Eco-Toxic Risk Assessment of Nearshore Sediments in Bay of Bengal - Environmental Radioactivity and Ecological Risk as a Proxy

Bharath

Natesan

Seethapathy

et al. 2022

Preprint

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The present study focuses on the environmental radioactivity and multi-risk assessment of nearshore sediments as a source of marine pollution along the Bay of Bengal. The study examines the distribution of primordial radionuclides concentration using a Na(I)Tl detector-based gamma-ray spectrometer and Potentially Toxic Elements (PTE) through atomic adsorption analysis. Further, the data obtained and characterization radiological risks, ecological threats, and assessing the spatial distribution of toxic elements in nearshore sediments as a proxy for marine contamination. The active concentration of primordial radionuclides such as 238U, 232Th and 40K were found in ranged from ≤ 3 to 68 (11.4), ≤ 9.5 to 142.7 (41.2) and 85.2 to 603.4 (362) Bq kg-1. Results show that the concentration of the average radionuclides is less than suggested by UNSCEAR ranges. The concentration of potentially toxic elements (Fe, Cr, Ni, Pb and Zn) was higher in deeper water depth. This study exposes that the primary control of such elements is mud distribution. A decreasing order has been seen as follows by the ecological risk index of individual elements: Cu > Pb > Ni > Cr > Zn. The significant Pb, Cu and Zn concentration was polluted at most stations, possibly contributing the regional and terrestrial sources such as industrial activity, urban drainage, manufacturing, and farming. This research suggests that anthropogenic behaviours in nearby land are the source of the deposition of metals and radionuclides in coastal and marine sediments.

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Section: Sampling and Sample Preparationmentioning

confidence: 99%

“…Radon and the daughter products have their environmental exposures and quantified, suggested by (Gbadamosi et al 2018;Belyaeva et al 2021). The average permissible limit of 238 U ( 226 Ra)…”

Section: Internal Hazard Index (Hin)mentioning

confidence: 99%

Eco-Toxic Risk Assessment of Nearshore Sediments in Bay of Bengal - Environmental Radioactivity and Ecological Risk as a Proxy

Bharath

Natesan

Seethapathy

et al. 2022

Preprint

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“…Soil represents the prime source of continuous radiation outdoor exposure to humans. Although soil radionuclide contents are directly linked to those of the parent rock [9,[18][19][20], soil formation processes could contribute to changes in the soil's radionuclide contents by addition, loss, and translocation [3,18,21]. Soil physicochemical attributes such as texture, pH, organic matter content (OM%), and concentration of the scavenger metals Fe and Mn have a remarkable influence on the distribution and mobility of radionuclides in the soil [16,18,[22][23][24].…”

Section: Introductionmentioning

confidence: 99%

“…Min 7.65 1 20. 19.19 2.39 8.70 47.60 8.10 3.20 0.01 0.50 3.50 UDL UDL 9.39 Max 8.96 6.63 84.25 35.97 41.80 76.20 21.00 10.40 0.26 2.75 6.50 33.30 28.28 697.99 Mean 8.32 4.03 50.57 22.05 18.46 55.91 13.41 7.60 0.15 1.71 5.17 20.61 15.01 240.12 Std.…”

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Distributions and Risk Assessment of the Natural Radionuclides in the Soil of Shoubra El Kheima, South Nile Delta, Egypt

et al. 2022

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Due to heightening concern about radiation hazards protection, activity concentrations of 226Ra, 232Th, 40K in forty soil samples collected from Shoubra El Kheima in the South Nile Delta were measured using gamma-ray spectrometry. The mean activity concentrations of 226Ra and 40K were higher in 20% of the considered samples than the world average values. A comprehensive comparison with up-to-date data was carried out. Spatial distribution maps of the measured radionuclides and radiological parameters were generated. The distributions of natural radionuclides were influenced by the soil organic matter, clay content, and scavenger metals oxides, as well as differences in the physical and chemical attributes and solubility of these radionuclides. The results revealed that industrial activity and agricultural practices in the study area caused an incremental increase in 226Ra and 40K activity concentrations. It can be deduced that although there are intensive industrial activities in this area, the natural radiation that comes from the soil is normal and does not pose a significant radiological hazard to the public. The natural radioactivity of soil in this area needs to be monitored periodically to prevent unnecessary radiation exposure to inhabitants.

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“…Uranium mining practices usually result in an increase in radionuclide concentrations in the environment, which can lead to increased radiation exposure for the population [1]. Compared to radioactive waste from nuclear power plants, waste from uranium mining activities is characterized by a significantly lower level of radioactivity, but in the case of large volumes of naturally radioactive waste, an increase in the risk of radiation exposure for the local population can occur [2].…”

Section: Introductionmentioning

confidence: 99%

Natural Radioactivity in Soil and Radiological Risk Assessment in Lișava Uranium Mining Sector, Banat Mountains, Romania

Ion

Cosac²,

Ene³

2022

Applied Sciences

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The specific activity and spatial distribution of 238U, 232Th and 40K were determined in the surface soil from the Lișava uranium mining sector. This sector belongs to the Banat district, an historically important uranium mining area in Romania (an area with closed uranium mines and a radioactive waste dump). Gamma-ray spectrometry using a high-purity germanium (HPGe) detector was used to measure the activity of naturally occurring radionuclides in the soil. The average specific activities of 238U, 232Th and 40K in the soil were 197.21 Bq/kg for 238U, 16.21 Bq/kg for 232Th and 543.21 Bq/kg for 40K. The mineral contents of selected waste rock samples (sandstones) were examined using a scanning electron microscope (SEM), which revealed that brannerite, pitchblende and coffinite were the most important uranium-bearing minerals. The means of the radiological hazard parameters were calculated to be 262.22 Bq/kg radium equivalent activity (Raeq), 123.72 nGy/h absorbed gamma dose rates (DR), 0.7 external hazard index (Hex) and 1.8 representative level index (RLI). The spatial distribution of the risk assessment indices associated with the investigated soils exceeded the median values provided by UNSCEAR and reflected the geological settings and influences of anthropic activities such as uranium mining practices and the tipping of radioactive mining waste.

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Yerevan soil radioactivity: Radiological and geochemical assessment

Cited by 32 publications

References 21 publications

Eco-Toxic Risk Assessment of Nearshore Sediments in Bay of Bengal - Environmental Radioactivity and Ecological Risk as a Proxy

Eco-Toxic Risk Assessment of Nearshore Sediments in Bay of Bengal - Environmental Radioactivity and Ecological Risk as a Proxy

Distributions and Risk Assessment of the Natural Radionuclides in the Soil of Shoubra El Kheima, South Nile Delta, Egypt

Natural Radioactivity in Soil and Radiological Risk Assessment in Lișava Uranium Mining Sector, Banat Mountains, Romania

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