Lithogenic radionuclides in surface soils of Serbia: Spatial distribution and relation to geological formations

Dragović, Snežana; Janković-Mandić, Ljiljana; Dragović, Ranko; Đorđević, Milan; Đokić, Mrđan; Kovačević, Jovan

doi:10.1016/j.gexplo.2013.07.015

Cited by 22 publications

(11 citation statements)

References 21 publications

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“…The mean activity concentrations 40 K and 232 Th in soil samples were higher than the world average value of 400 Bqk -1 and 30 Bqk -1 [32]. It is pertinent to note that different soil properties and weather conditions affect the accumulation of radioisotopes.…”

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confidence: 83%

“…It may also have been due to the application of fertilizers to the soil and high clay content [18]. It is important to note that the activity composition [32] which may be due to the application of fertilizers to recover soils of depleted nutrients due to farming and erosion concentration higher than the world average of [32] which may be due to the application of fertilizers to recover soils of depleted nutrients due to farming and erosion Th and 226 Ra in the three farms studied may be due to differences in fertilizer application and system of farming. The result of activity concentration of 40 K, 232 Th and 226 Ra obtained in this study were higher than those obtained in similar work done by other researchers except for potassium -40 [2,8,18].…”

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confidence: 99%

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Uptake and Distribution of Natural Radionuclides in Cassava Crops from Nigerian Government Farms

Ononugbo

Azikiwe

Avwiri

2019

JSRR

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Radioactivity distribution and transfer factor (TF) in plants are crucial parameters used to assess radioactive contamination in the environment, impact of soil radioactivity on agricultural crops and its risks to humans. The root crop cassava (Manihot esculenta) provides about 50 percent of the calories consumed in Nigeria. Gamma - ray spectroscopy was used to measure activity concentrations of 226Ra, 232Th and 40K in cassava root and soil. The average activity concentration of 40K, 226Ra and 232Th in cassava was 565.31± 13.17, 21.89±5.94 and 817.28±2.52 Bqkg-1 respectively. The mean activity concentration 40K, 226Ra and 232Th in soil range from 92.07±35.08 to 689.28±14.35 Bqkg-1with a mean value of 413.64±21.22 Bqkg-1, 5.37 ± 8.90 to 64.93 ± 7.23 Bqkg-1 with a mean value of 54.43 ± 3.22 and BDL to 928.15 ± 2.36 Bqkg-1 with a mean value of 561.67 ± 2.21 Bqkg-1. The transfer values for 226Ra, 232Th and 40K were in the range of 0 to 1.81, 0 to 3.41 and 0.68 to 4.5 respectively. The high value of transfer factor for 40k may be due to its importance in plant growth, fertilization and adaptability of plant to environmental pressures. It may have also been enhanced by the application of NPK fertilizers in those farms. Thorium showed the highest mean transfer factor which may be due to its higher accumulation in soil and higher uptake by plants (Figure 3). The average transfer factors of 226Ra (0.99) < 40K (1.55) < 232Th (1.66) show that although activity concentration of the natural radioisotopes in the area under study are high, the rate at which they are transferred to cassava are still moderate. The average values of radium equivalent activity (Raeq), absorbed dose rate (D), annual effective dose rate (AEDE), internal hazard index and excess life cancer risk (ELCR) are 1009.27 Bqk-1, 346.50 nGyh-1, 1.51 mSvy-1, 2.78 and 3.92 x 10-3 for respectively. These values were higher than their corresponding permissible values of 370Bqk-1, 55nGyh-1, 1.0 mSvy-1, 1.0 and 0.29 x 10-3 respectively. The mean values of Hex and Hin are greater than unity and may, therefore, constitute a significant radiological health risk. The mean annual gonad dose estimated value of 2943.90 mSvy-1 was above the world acceptable value of 300 mSvy-1 and the annual effective dose in all the samples except in few locations as shown in Figure 2, exceeded the safe value of 1.0 mSvy-1. The use of soil from these farms and the crops may constitute a threat to the bone marrow and general health conditions of the inhabitants.

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confidence: 83%

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confidence: 99%

Uptake and Distribution of Natural Radionuclides in Cassava Crops from Nigerian Government Farms

Ononugbo

Azikiwe

Avwiri

2019

JSRR

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“…However, only few published studies offer maps of radionuclide distribution (Dragovi c et al 2014;Erenturk et al 2014), in particular for uranium mining impacted environments (Vandenhove et al 2006;Bollh€ ofer et al 2006Bollh€ ofer et al , 2014. Moreover, the considered areas usually vary from 10 to 100 km 2 and do not allow us to determine local accumulation areas.…”

Section: Introductionmentioning

confidence: 99%

“…A technique widely used to understand the distribution of trace elements in the different solid phases is sequential selective chemical extraction. With that in mind, the revised standardized 3-step procedure of Rauret et al (1999), developed within the framework of the Standards, Measurements and Testing Program (SMTP), offers many benefits, since it is easy to use, rapid, and frequently applied in the case of environmental contamination due to uranium mining and/ or processing (Dhoum and Evans, 1998;Martin et al 1998;Howe et al 2002;Meca et al 2012;Smodi s et al 2012; Strok and Smodi s, 2013).…”

Section: Introductionmentioning

confidence: 99%

Uranium decay daughters from isolated mines: Accumulation and sources

Cuvier

Panza

Pourcelot

et al. 2015

Journal of Environmental Radioactivity

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“…Numerous studies have been conducted to assess the radiation exposure due to these radionuclides and the results obtained are exploited to enrich the world's data bank, greatly needed for evaluating worldwide average values of radiometric and dosimetric quantity [4]. Investigation of soil radioactivity receives particular attention worldwide.…”

Section: Introductionmentioning

confidence: 99%

The Natural Radionuclides in Soils of Subotica (Serbia): Distribution and Corresponding Gamma Dose Rates

Janković-Mandić¹,

Dragović²,

Pisanjuk³

et al. 2016

RAD Conference Proceedings

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Abstract. The activity concentrations of 40 K, 226 Ra and 232 Th from 50 locations on the territory of Subotica, North Serbia, were determined by gamma ray spectrometry. Based on the activity concentrations of investigated radionuclides, the absorbed gamma dose rate in the air was calculated. The mean values of activity concentrations were found to be 290 Bq/kg for 40 K, 20 Bq/kg for 226 Ra and 18 Bq/kg for 232 Th. The total absorbed gamma dose rate varied between 24 and 46 nGy/h. The mean value of 32 nGy/h was lower than the world average value.

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Lithogenic radionuclides in surface soils of Serbia: Spatial distribution and relation to geological formations

Cited by 22 publications

References 21 publications

Uptake and Distribution of Natural Radionuclides in Cassava Crops from Nigerian Government Farms

Uptake and Distribution of Natural Radionuclides in Cassava Crops from Nigerian Government Farms

Uranium decay daughters from isolated mines: Accumulation and sources

The Natural Radionuclides in Soils of Subotica (Serbia): Distribution and Corresponding Gamma Dose Rates

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