Can we predict uranium bioavailability based on soil parameters? Part 1: Effect of soil parameters on soil solution uranium concentration

Vandenhove, Hildegarde; Hees, May Van; Wouters, Kristien; Wannijn, Jean

doi:10.1016/j.envpol.2006.04.011

Cited by 110 publications

(59 citation statements)

References 22 publications

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“…However, another study considers a similar situation by which high U enrichment (up to 1000 ppm) occurs in a peat bog (which is located close to a natural U mineralization), where it is accumulated due to complexation and retention by carboxyl functional groups (Read et al, 1993). Similarly, Vandenhove et al (2006) found a strong positive correlation between U and soil organic matter when introducing U(VI) into different types of soil samples indicating that U binds to the organic matter.…”

Section: U Binding To Dischma Soilsmentioning

confidence: 99%

Speciation of naturally-accumulated uranium in an organic-rich soil of an alpine region (Switzerland)

Regenspurg

Margot-Roquier

Harfouche

et al. 2010

Geochimica et Cosmochimica Acta

104

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Very high concentrations of uranium (up to 4000 ppm) were found in a natural soil in the Dischma valley, an alpine region in the Grisons canton in Switzerland. The goal of this study was to examine the redox state and the nature of uranium binding in the soil matrix in order to understand the accumulation mechanism. Pore water profiles collected from Dischma soil revealed the establishment of anoxic conditions with increasing soil depth.

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Section: U Binding To Dischma Soilsmentioning

confidence: 99%

Speciation of naturally-accumulated uranium in an organic-rich soil of an alpine region (Switzerland)

Regenspurg

Margot-Roquier

Harfouche

et al. 2010

Geochimica et Cosmochimica Acta

104

View full text Add to dashboard Cite

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“…On the other hand, with rising pH, there is a tendency for the carbonate concentration to increase which is the most important complexing agent for uranium. Above pH 6, the fraction of uranium forming complexes with carbonates increases, tending to enhance U mobility in the soil and therefore the possible assimilation by the plants [22].…”

Section: Resultsmentioning

confidence: 99%

Enhancing the transfer of²³⁸U and²²⁶Ra from soils toBrassica juncea

2009

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Abstract. In order to test the suitability of using Brassica juncea for the remediation by phytoextraction of soils contaminated with 238 U and 226 Ra, the transfer process to the plant was studied. A soil with high natural uranium mineralization was used for the study. When the soil was not manipulated, the transfer factor (TF) was 0.24 ± 0.02 and 1.5 ± 0.3 for 238 U and 226 Ra, respectively. These low values, especially for 238 U, are due to the radionuclides being associated in the soils with fractions unavailable to the plant. For the possible use of phytoextraction for remediation of contaminated soils it is therefore necessary to enhance the availability of the radionuclides in the soil. In this sense, soil pH is a major factor influencing the availability of these elements in the soil for plant uptake through their speciation. In this work, the effect of pH on the TF of 238 U and 226 Ra was studied. Also, citrate was used to attempt to enhance the bioavailability of the two radionuclides in the soils, and therefore their uptake by Brassica juncea and translocation to the shoots.

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“…Obviously it is virtually impossible to find such a study that also supplies all necessary input data for simulation. However, Vandenhove et al [12] studied the influence of soil parameters on soil solution concentration of one single nuclide, uranium, which is sorbed by clay, HFO and organic matter as well. They performed batch equilibrium experiments with 18 different soils that covered a comparatively wide range of soil parameters such as pH, CEC, clay content, HFO content and percentage of organic matter.…”

Section: Model Verificationmentioning

confidence: 99%

Estimation of speciation and distribution of long-lived radionuclides in soils after irrigation with contaminated well water

2011

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Abstract. In this study it is shown how the behaviour of radionuclides in agricultural soils can be quantitatively estimated. The sorption of those nuclides onto soil particle surfaces is a key process which every predictive model has to take into account. This has been accomplished by implementing a component additivity (CA-) model into the well known geochemical code PHREEQC that includes the most important sorbents clay, amorphous iron oxide and organic matter. For uranium and cesium it is shown that model calculations are in excellent agreement with experimental data.

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Can we predict uranium bioavailability based on soil parameters? Part 1: Effect of soil parameters on soil solution uranium concentration

Cited by 110 publications

References 22 publications

Speciation of naturally-accumulated uranium in an organic-rich soil of an alpine region (Switzerland)

Speciation of naturally-accumulated uranium in an organic-rich soil of an alpine region (Switzerland)

Enhancing the transfer of²³⁸U and²²⁶Ra from soils toBrassica juncea

Estimation of speciation and distribution of long-lived radionuclides in soils after irrigation with contaminated well water

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Can we predict uranium bioavailability based on soil parameters? Part 1: Effect of soil parameters on soil solution uranium concentration

Cited by 110 publications

References 22 publications

Speciation of naturally-accumulated uranium in an organic-rich soil of an alpine region (Switzerland)

Speciation of naturally-accumulated uranium in an organic-rich soil of an alpine region (Switzerland)

Enhancing the transfer of238U and226Ra from soils toBrassica juncea

Estimation of speciation and distribution of long-lived radionuclides in soils after irrigation with contaminated well water

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Enhancing the transfer of²³⁸U and²²⁶Ra from soils toBrassica juncea