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23 mar 2022 · Biogeochemical cycle of uranium (U) in soil-plant system. … Worldwide geographical distribution of the 789 sampling locations of uranium-contaminated soils and dataset of U concentration in...
5 lip 2021 · This review is divided into eight sections: (i) introduction; (ii) uranium sources and the natural levels in soils; (iii) geochemical U behavior in soil; (iv) U soil-plant transfer; (v) U toxicity symptoms in plants; (vi) plant tolerance mechanisms to U stress; (vii) bioremediation technologies; and (viii) conclusions and outlook.
1 lis 2022 · Highlights. •. Mesocosm experiment was setup to study long-term behaviour of U in soil system. •. Change in U bioavailability with age was studied by wet chemical and XAS techniques. •. U (VI) bound to soil reducible fraction is rapid but stability is altered in a year. •. Long term U immobilisation using Fe-based PRB is questionable. •.
23 mar 2022 · Increasing uranium (U) content in soils due to anthropogenic U contamination causes accumulation of U in plants, which greatly increases human health risks. This review identified the diverse sources of soil U contamination and their significant spatial variations in surface soils globally based on 789 soil sampling sites collected from 76 studies.
3 sty 2020 · Uranium mass concentrations in parent rocks vary from 0.1 to 1,250 ppm with a typical range of 2.0 – 6.1 ppm or 25 – 75 Bq kg -1 238 U ( Table 1) ( Rubtsov, Pravdina, 1971 ).
... strongly affect U speciation (Table S3) and bioavailability in the soil (Figure 1). Considering the above factors, it is necessary to analyze the speciation and bioavailability of U in...
26 kwi 2019 · It was found that uranium, introduced into the soil as a solution of 238 UO 2 (NO 3) 2, comprises mainly exchangeable forms with soil components in desert-sandy soil and light and typical sierozems, and in meadow soils, the uranium interaction with soil components results in acid-soluble form.
