Influence of soil texture on the distribution and availability of 238U, 230Th, and 226Ra in soils

Rodríguez, P. Blanco; Tomé, F. Vera; Lozano, J.C.; Pérez‐Fernández, María

doi:10.1016/j.jenvrad.2008.03.004

Cited by 42 publications

(5 citation statements)

References 22 publications

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“…Globally, the activity of U and decay daughters increases as the grain size decreases. It is consistent with the activity measured in different grain size fractions of soil or sediment samples in other studies (Livens and Baxter, 1988;Frindik and Vollmer, 1999;Blanco Rodríguez et al 2008).…”

Section: Multi Scale Accumulation Of Radionuclides Downstream Of the supporting

confidence: 92%

Uranium decay daughters from isolated mines: Accumulation and sources

Cuvier

Panza

Pourcelot

et al. 2015

Journal of Environmental Radioactivity

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Section: Multi Scale Accumulation Of Radionuclides Downstream Of the supporting

confidence: 92%

Uranium decay daughters from isolated mines: Accumulation and sources

Cuvier

Panza

Pourcelot

et al. 2015

Journal of Environmental Radioactivity

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“…Previous studies have shown relationships between U and the abundance of finer particles (Blanco-Rodríguez et al 2008;Scheffer et al 2010;Kumar et al 2015), and with Al and Fe in agricultural soils (Yamaguchi et al 2009). However, other studies have pointed out the importance of carbonates to determine U mobility (e.g., Echevarria et al 2001;Bigalke et al 2020).…”

Section: Soil Predictorsmentioning

confidence: 97%

Distribution, behavior, and erosion of uranium in vineyard soils

Campos

Blanché

Jungkunst

et al. 2021

Environ Sci Pollut Res

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Phosphate fertilization contributes to an input of uranium (U) in agricultural soils. Although its accumulation and fate in agricultural soils have been previously studied, its colloidal transport and accumulation along slopes through erosion have been studied to a lesser extent in viticulture soils. To bridge this gap, the contents and potential mobility of U were investigated in vineyard model soils in the Rhineland-Palatinate region, Germany. In addition to elevated U contents, U was expected to associate with colloids and subject to erosion, thus accumulating on slope foots and in soils with fine structure, and reflecting a greater variability. Moreover, another expectation was the favorable erosion/mobility of U in areas with greater carbonate content. This was tested in three regional locations, at different slope positions and through soil horizon depths, with a total of 57 soil samples. The results show that U concentrations (0.48–1.26 ppm) were slightly higher than proximal non-agricultural soils (0.50 ppm), quite homogenous along slope positions, and slightly higher in topsoils. Assuming a homogeneous fertilization, the vertical translocation of U in soil was most probably higher than along the slope by erosion. In addition, carbonate content and soil texture correlated with U concentrations, whereas other parameters such as organic carbon and iron contents did not. The central role of carbonate and soil texture for the prediction of U content was confirmed using decision trees and elastic net, although their limited prediction power suggests that a larger sample size with a larger range of U content is required to improve the accuracy. Overall, we did not observe neither U nor colloids accumulating on slope foots, thus suggesting that soils are aggregate-stable. Lastly, we suggested considering further soil parameters (e.g., Ca2+, phosphorus, alkali metals) in future works to improve our modelling approach. Overall, our results suggest U is fortunately immobile in the studied locations.

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“…Vandenhove et al (2009) reported a 238 U transfer factor for cereal straw of 0.25 and cereal grain of 0.18, both for loamy soil. Blanco Rodríguez et al (2008) aimed to evaluate the capacity of each granulometric fraction of the soil to liberate radionuclides in order to make estimates of their availability. This capacity was found to be dependent on both the fraction and the radionuclide.…”

Section: Natural Radionuclides In Wheat Rootsmentioning

confidence: 99%