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• W2001055504 abstract "Abstract The long-term success of in situ reductive immobilization of uranium (U) depends on the stability of U(IV) precipitates (e.g., uraninite) in the presence of natural oxidants, such as oxygen, Fe(III) hydroxides, and nitrite. Field and laboratory studies have implicated iron sulfide minerals as redox buffers or oxidant scavengers that may slow oxidation of reduced U(IV) solid phases. Yet, the inhibition mechanism(s) and reaction rates of uraninite (UO2) oxidative dissolution by oxic species such as oxygen in FeS-bearing systems remain largely unresolved. To address this knowledge gap, abiotic batch experiments were conducted with synthetic UO2 in the presence and absence of synthetic mackinawite (FeS) under simulated groundwater conditions of pH = 7, P O 2  = 0.02 atm, and P CO 2  = 0.05 atm. The kinetic profiles of dissolved uranium indicate that FeS inhibited UO2 dissolution for about 51 h by effectively scavenging oxygen and keeping dissolved oxygen (DO) low. During this time period, oxidation of structural Fe(II) and S(-II) of FeS were found to control the DO levels, leading to the formation of iron oxyhydroxides and elemental sulfur, respectively, as verified by X-ray diffraction (XRD), Mossbauer, and X-ray absorption spectroscopy (XAS). After FeS was depleted due to oxidation, DO levels increased and UO2 oxidative dissolution occurred at an initial rate of rm = 1.2 ± 0.4 × 10−8 mol g−1 s−1, higher than rm = 5.4 ± 0.3 × 10−9 mol g−1 s−1 in the control experiment where FeS was absent. XAS analysis confirmed that soluble U(VI)-carbonato complexes were adsorbed by iron oxyhydroxides (i.e., nanogoethite and lepidocrocite) formed from FeS oxidation, which provided a sink for U(VI) retention. This work reveals that both the oxygen scavenging by FeS and the adsorption of U(VI) to FeS oxidation products may be important in U reductive immobilization systems subject to redox cycling events." @default.
• W2001055504 created "2016-06-24" @default.
• W2001055504 creator A5046654476 @default.
• W2001055504 creator A5054527832 @default.
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• W2001055504 creator A5080494895 @default.
• W2001055504 date "2013-02-01" @default.
• W2001055504 modified "2023-10-18" @default.
• W2001055504 title "Oxidative dissolution of UO2 in a simulated groundwater containing synthetic nanocrystalline mackinawite" @default.
• W2001055504 cites W1503661460 @default.
• W2001055504 cites W1612839135 @default.
• W2001055504 cites W1892891533 @default.
• W2001055504 cites W1965824352 @default.
• W2001055504 cites W1968143441 @default.
• W2001055504 cites W1970938691 @default.
• W2001055504 cites W1971971376 @default.
• W2001055504 cites W1974643618 @default.
• W2001055504 cites W1974755705 @default.
• W2001055504 cites W1976312798 @default.
• W2001055504 cites W1977005208 @default.
• W2001055504 cites W1978450379 @default.
• W2001055504 cites W1981625346 @default.
• W2001055504 cites W1984725669 @default.
• W2001055504 cites W1985144076 @default.
• W2001055504 cites W1987738869 @default.
• W2001055504 cites W1990734865 @default.
• W2001055504 cites W1992107951 @default.
• W2001055504 cites W1993596116 @default.
• W2001055504 cites W1995706097 @default.
• W2001055504 cites W1996462050 @default.
• W2001055504 cites W1996964882 @default.
• W2001055504 cites W1998899123 @default.
• W2001055504 cites W2005033283 @default.
• W2001055504 cites W2005041872 @default.
• W2001055504 cites W2010442617 @default.
• W2001055504 cites W2012962062 @default.
• W2001055504 cites W2015253895 @default.
• W2001055504 cites W2020481247 @default.
• W2001055504 cites W2023109721 @default.
• W2001055504 cites W2026476028 @default.
• W2001055504 cites W2029845306 @default.
• W2001055504 cites W2030607542 @default.
• W2001055504 cites W2032978089 @default.
• W2001055504 cites W2034935928 @default.
• W2001055504 cites W2046420353 @default.
• W2001055504 cites W2046508306 @default.
• W2001055504 cites W2056971113 @default.
• W2001055504 cites W2057748198 @default.
• W2001055504 cites W2059439578 @default.
• W2001055504 cites W2060132882 @default.
• W2001055504 cites W2063917449 @default.
• W2001055504 cites W2065185701 @default.
• W2001055504 cites W2069691664 @default.
• W2001055504 cites W2070912856 @default.
• W2001055504 cites W2071640900 @default.
• W2001055504 cites W2071704543 @default.
• W2001055504 cites W2073456692 @default.
• W2001055504 cites W2078730606 @default.
• W2001055504 cites W2080567741 @default.
• W2001055504 cites W2080950776 @default.
• W2001055504 cites W2081684175 @default.
• W2001055504 cites W2082506930 @default.
• W2001055504 cites W2083854091 @default.
• W2001055504 cites W2084239798 @default.
• W2001055504 cites W2084821401 @default.
• W2001055504 cites W2085475154 @default.
• W2001055504 cites W2090483842 @default.
• W2001055504 cites W2091913250 @default.
• W2001055504 cites W2098784772 @default.
• W2001055504 cites W2102198371 @default.
• W2001055504 cites W2114929051 @default.
• W2001055504 cites W2117719113 @default.
• W2001055504 cites W2138612111 @default.
• W2001055504 cites W2139122684 @default.
• W2001055504 cites W2141108612 @default.
• W2001055504 cites W2149158962 @default.
• W2001055504 cites W2154269000 @default.
• W2001055504 cites W2154836565 @default.
• W2001055504 cites W2154900976 @default.
• W2001055504 cites W2158332580 @default.
• W2001055504 cites W2159462457 @default.
• W2001055504 cites W2164989463 @default.
• W2001055504 cites W2169926457 @default.
• W2001055504 cites W2170151876 @default.
• W2001055504 cites W2313040401 @default.
• W2001055504 cites W2313802187 @default.
• W2001055504 cites W2320966973 @default.
• W2001055504 cites W2328250730 @default.
• W2001055504 cites W4240772408 @default.
• W2001055504 doi "https://doi.org/10.1016/j.gca.2012.10.032" @default.
• W2001055504 hasPublicationYear "2013" @default.
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