210Po sequential extraction applied to wetland soils at uranium mining sites
نویسندگان
چکیده
منابع مشابه
Assessment of a sequential phase extraction procedure for uranium-series isotope analysis of soils and sediments.
The study of uranium-series (U-series) isotopes in soil and sediment materials has been proposed to quantify rates and timescales of soil production and sediment transport. Previous works have studied bulk soil or sediment material, which is a complex assemblage of primary and secondary minerals and organic compounds. However, the approach relies on the fractionation between U-series isotopes i...
متن کاملMobile uranium(IV)-bearing colloids in a mining-impacted wetland.
Tetravalent uranium is commonly assumed to form insoluble species, resulting in the immobilization of uranium under reducing conditions. Here we present the first report of mobile U(IV)-bearing colloids in the environment, bringing into question this common assumption. We investigate the mobility of uranium in a mining-impacted wetland in France harbouring uranium concentrations of up to 14,000...
متن کاملDIVISION S-10-WETLAND SOILS Wetland Soils — Opportunities and Challenges
Wetlands are an important natural resource in the biosphere. Traditional terms used to describe wetlands are marshes, bogs, and swamps. Early European settlers considered these areas as wastelands and did not appreciate their values. For a number of years, many of these areas were drained and used as farmland, since these lands were found to be productive. Over a 200-yr time span (1780-1980), t...
متن کاملEvaluation of the BCR sequential extraction procedure applied for two unpolluted Spanish soils.
The procedure of BCR sequential extraction has been applied to five samples from two unpolluted soils in southern Spain. Total concentrations of different elements have been calculated as the sum of the three fractions of BCR and the residue has been measured for each. Also, a total analysis based on INAA or total-digestion techniques has been performed for the same samples. BCR and total analy...
متن کاملBiodegradation of Uranium-Citrate Complexes: Implications for Extraction of Uranium from Soils
Citrate is often used as a complexing agent to mobilize sorbed and precipitated uranium in both in situ and ex situ extraction of soils and nuclear reactor components. The biodegradability of U-citrate complexes is an important control over the potential migration of residual uranium after the extraction process is complete. In solutions buffered at pH 6-7, limited biodegradation of citrate is ...
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ژورنال
عنوان ژورنال: Journal of Environmental Radioactivity
سال: 2019
ISSN: 0265-931X
DOI: 10.1016/j.jenvrad.2018.12.027