1999
DOI: 10.1016/s0016-7037(99)00265-3
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Surface catalysis of uranium(VI) reduction by iron(II)

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Cited by 595 publications
(606 citation statements)
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“…One of the processes of Fe oxidation is due to reduction of U 6+ . The significant role of these surface-bound Fe 2+ →Fe 3+ /U 6+ →U 4+ redox systems for the fixing of uranium onto rock surfaces was investigated in details by Liger et al (1999), their findings were in full correspondence with the previous work of Stumm and Sulzberger (1992). As an indirect proof of Fe 2+ oxidation induced by U 6+ reduction, the uptake experiments were repeated on fresh D-11 thin sections with structures similar to the original ones.…”
Section: Resultsmentioning
confidence: 69%
“…One of the processes of Fe oxidation is due to reduction of U 6+ . The significant role of these surface-bound Fe 2+ →Fe 3+ /U 6+ →U 4+ redox systems for the fixing of uranium onto rock surfaces was investigated in details by Liger et al (1999), their findings were in full correspondence with the previous work of Stumm and Sulzberger (1992). As an indirect proof of Fe 2+ oxidation induced by U 6+ reduction, the uptake experiments were repeated on fresh D-11 thin sections with structures similar to the original ones.…”
Section: Resultsmentioning
confidence: 69%
“…Research thus far has demonstrated U(VI) reduction by Fe(II) sorbed onto a variety of iron oxides/oxyhydroxides (Charlet et al, 1998;Liger et al, 1999;Fredrickson et al, 2000;Jeon et al, 2004), Fe(II)-containing natural sediments (Behrends and Van Cappellen, 2005;Jeon et al, 2005), Fe(II)-containing carboxyl-functionalized microspheres (Boyanov et al, 2007), Fe(II) sorbed on corundum (Regenspurg et al, 2009) and Fe(II) sorbed on montmorillonite (Chakraborty et al, 2010). These studies primarily consider surface catalyzed processes that involved either concomitant or sequential adsorption of aqueous Fe(II) and U(VI) species onto a solid phase adsorbent or mineral to mediate abiotic U(VI) reduction.…”
Section: Introductionmentioning
confidence: 99%
“…Therefore an elevated concentration of OH -counter-ions will form near the surface, locally shifting the Fe(II) speciation equilibrium in favour of the faster oxidising FeOH + and Fe(OH) 2 0 species. 2) Reactive surface species mechanism (Tamura et al, 1976;Wherli, 1990;Liger et al, 1999): Chemisorbtion of Fe(II) at the Fe(III)oxyhydroxide surface enhances its reactivity in electron transfer reactions in the same way that hydrolysis promotes electron transfer in dissolved Fe(II). 3) Semiconductor mechanism (Park and Dempsey, 2005 and references therein): Fe(III)oxyhydroxide can act as a semiconductor in the presence of adsorbed Fe(II) due to electron transfer with the underlying Fe(III).…”
Section: Introductionmentioning
confidence: 99%