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搜索结果: 1-15 共查到地质学 Oxidation相关记录38条 . 查询时间(0.062 秒)
Abstract: Glauconite from the oxidized and reduced zones of soil-geologic columns at two Coastal Plain sites, one in Maryland and one in New Jersey, was examined by M鰏sbauer spectroscopy. The data ind...
Ce0.8La0.2O1.9-attapulgite (Ce0.8La0.2O1.9-ATP) nanocomposite materials were synthesized by co-precipitation method. The microstructure and phase composition of the as-prepared samples were characteri...
Abstract: A synthetic octahedral-site-vacancy-free annite sample and its progressive oxidation, induced by heating in air, were studied by powder X-ray diffraction (pXRD), Mössbauer spectroscopy,...
Abstract: Reduction of structural Fe in Na-exchanged dioctahedral smectites decreases swellability in water, but because clay interlayers also collapse in the process the concomitant effect on surface...
The interaction of gaseous O , H O, and their mixtures with clean {100} surfaces of pyrite 2 2) were investigated in ultra-high vacuum using scanning tunneling microscopy and spectros-(FeS copy (STM...
Abstract: Mn-substituted goethite was synthesized and the interaction between arsenite (As(III)) and Mn-substituted goethite was investigated by both solution chemistry and X-ray adsorption near edge ...
XANES measurements on gold-bearing arsenian pyrite from the Twin Creeks Carlin-type gold and Au and arsenic is present at As . Au is attributed deposits show that gold is present as both Au to su...
Surface colonization and microbial dissolution of pyrite were studied in the laboratory and by in situ surface colonization experiments conducted at Iron Mountain, California.Laboratory experiments in...
ThegeochemistryofCoattheEarthflssurfaceiscloselyassociatedwiththatofmanganeseoxides.ThisgeochemicalassociationresultsfromtheoxidationofhighlysolubleCotoweaklysolubleCo species,coupledwiththereductiono...
Theyoungestsamplehasparameterscorrespondingtonearlyunoxidizedtitanomagne- tite,whereastheoldestisnear-end-membertitanomaghemite.Intermediatesamplesare partiallyalteredbutdisplaynosuperstructurere?ec...
MarcasitesurfaceswereanalyzedusingX-rayphotoelectronspectroscopy(XPS)andaugerelectronspectroscop(AES).XPSdataofapristinemarcasitesurfaceareusedasatemplatetoexaminethecharacteristicsofamarcasitesurface...
Abstract: Ferruginous beidellites with Al:Fe atomic ratios up to 2.36 were obtained when solutions containing Al, Fe2+ and H4SiO4 were adjusted to pH 8.5 with Ca(OH)2 and incubated at 95 癈 in the pres...
X-ray and ultraviolet photoelectron spectroscopy (XPS and UPS,respectively) and scan-ning tunneling microscopy (STM) were used to observe the initial oxidation of pyrite surfaces in air. The results s...
Abstract: Submicron-sized (∼3–60 nm) powders of Al-substituted magnetite were synthesized in the laboratory by precipitation methods by mixing appropriate molar volumes FeCl2, FeCl3 and AlCl3 so...
Phenol (benzenol) oxidation by three synthetic manganese oxides (buserite, manganite, and feitknechtite) has been studied in aerated, aqueous, acidified suspensions. The rate of reaction was pH depend...

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