Isotopic Evidence for Reductive Immobilization of Uranium Across a Roll-Front Mineral Deposit
نویسندگان
چکیده
منابع مشابه
Evidence of uranium biomineralization in sandstone-hosted roll-front uranium deposits, northwestern China
We show evidence that the primary uranium minerals, uraninite and coffinite, from high-grade ore samples (U3O8N0.3%) in the Wuyiyi, Wuyier, and Wuyisan sandstone-hosted roll-front uranium deposits, Xinjiang, northwestern China were biogenically precipitated and psuedomorphically replace fungi and bacteria. Uranium (VI), which was the sole electron acceptor, was likely to have been enzymically r...
متن کاملMineral paragenesis and textures associated with sandstone-hosted roll-front uranium deposits, NW China
We present a first paragenetic study of the Wuyier, Wuyisan, Wuyiyi and Shihongtan sandstone-hosted roll-front uranium deposits, northwest China. The mineralization is hosted by Lower–Middle Jurassic coarseto medium-grained sandstones, which are dark-gray to black due to a mixture of ore minerals and carbonaceous debris. The sandstone is alluvial fan-braided river facies. Minerals associated wi...
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Batch experiments were used to evaluate the reductive immobilization of hexavalent uranium (U(VI)) by synthesized, amorphous iron sulfide (FeS) in the anoxic environment. The tests were initiated by spiking 168.0 microM U(VI) to 0.18 g/L FeS suspensions under a CO2-free condition with pH varied from 5.99 to 10.17. The immobilization rate of U(VI) was determined by monitoring the changes of aque...
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In this paper, the effects of roll center height of McPherson suspension mechanism on dynamic behaviour of a vehicle are first studied, and then the optimum location of roll center of this suspension system is determined for a conceptual Class A vehicle. ADAMS/Car software was used for the analysis of vehicle dynamic behaviour in different positions of suspension roll center. Next, optimization...
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Microbial reduction of hexavalent uranium has been studied widely for its potential role in bioremediation and immobilization of soluble U(VI) in contaminated groundwater. More recently, some microorganisms have been examined for their role in immobilization ofU(VI) via precipitation of uranyl phosphatemineralsmediated bymicrobial phosphate release, alleviating the requirement for long-term red...
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ژورنال
عنوان ژورنال: Environmental Science & Technology
سال: 2016
ISSN: 0013-936X,1520-5851
DOI: 10.1021/acs.est.6b00626