與「John R. Bargar」相符的使用者個人學術檔案

John R. Bargar

Senior Scientist SLAC National Accelerator Laboratory
在 slac.stanford.edu 的電子郵件地址已通過驗證
被引用 21273 次

Uranium redox transition pathways in acetate-amended sediments

JR Bargar, KH Williams, KM Campbell… - Proceedings of the …, 2013 - National Acad Sciences
Redox transitions of uranium [from U(VI) to U(IV)] in low-temperature sediments govern the
mobility of uranium in the environment and the accumulation of uranium in ore bodies, and …

Identification of highly active Fe sites in (Ni, Fe) OOH for electrocatalytic water splitting

…, R Alonso-Mori, RC Davis, JR Bargar… - Journal of the …, 2015 - ACS Publications
Highly active catalysts for the oxygen evolution reaction (OER) are required for the development
of photoelectrochemical devices that generate hydrogen efficiently from water using …

Biogenic manganese oxides: properties and mechanisms of formation

BM Tebo, JR Bargar, BG Clement… - Annu. Rev. Earth …, 2004 - annualreviews.org
▪ Abstract Manganese(IV) oxides produced through microbial activity, ie, biogenic Mn
oxides or Mn biooxides, are believed to be the most abundant and highly reactive Mn oxide …

Characterization of U (VI)-carbonato ternary complexes on hematite: EXAFS and electrophoretic mobility measurements

JR Bargar, R Reitmeyer, JJ Lenhart, JA Davis - … et Cosmochimica Acta, 2000 - Elsevier
We have measured U(VI) adsorption on hematite using EXAFS spectroscopy and electrophoresis
under conditions relevant to surface waters and aquifers (0.01 to 10 μM dissolved …

Biotic and abiotic products of Mn(II) oxidation by spores of the marine Bacillus sp. strain SG-1

JR Bargar, BM Tebo, U Bergmann… - American …, 2005 - pubs.geoscienceworld.org
Bacterial Mn(II) oxidization by spores of Bacillus, sp. strain SG-1 has been systematically
probed over the time scale 0.22 to 77 days under in-situ conditions and at differing Mn(II) …

Environmental speciation of actinides

K Maher, JR Bargar, GE Brown Jr - Inorganic chemistry, 2013 - ACS Publications
Although minor in abundance in Earth’s crust (U, 2–4 ppm; Th, 10–15 ppm) and in seawater
(U, 0.003 ppm; Th, 0.0007 ppm), light actinides (Th, Pa, U, Np, Pu, Am, and Cm) are …

Spectroscopic confirmation of uranium (VI)− carbonato adsorption complexes on hematite

JR Bargar, R Reitmeyer, JA Davis - Environmental Science & …, 1999 - ACS Publications
Evaluating societal risks posed by uranium contamination from waste management facilities,
mining sites, and heavy industry requires knowledge about uranium transport in …

Evidence for the presence of Mn (III) intermediates in the bacterial oxidation of Mn (II)

SM Webb, GJ Dick, JR Bargar… - Proceedings of the …, 2005 - National Acad Sciences
Bacterial oxidation of Mn(II) to Mn(IV) is believed to drive the oxidative segment of the global
biogeochemical Mn cycle and regulates the concentration of dissolved Mn(II) in the oceanic …

Structural characterization of terrestrial microbial Mn oxides from Pinal Creek, AZ

JR Bargar, CC Fuller, MA Marcus, AJ Brearley… - … et Cosmochimica Acta, 2009 - Elsevier
The microbial catalysis of Mn(II) oxidation is believed to be a dominant source of abundant
sorption- and redox-active Mn oxides in marine, freshwater, and subsurface aquatic …

Non-uraninite products of microbial U (VI) reduction

…, JO Sharp, NS Wigginton, JR Bargar - … science & technology, 2010 - ACS Publications
A promising remediation approach to mitigate subsurface uranium contamination is the
stimulation of indigenous bacteria to reduce mobile U(VI) to sparingly soluble U(IV). The product …