搜索结果: 1-15 共查到“地质学 oxide”相关记录25条 . 查询时间(0.159 秒)
Nitric oxide turnover in permeable river sediment
Nitric oxide turnover permeable river sediment
2014/7/10
We measured nitric oxide (NO) microprofiles in relation to oxygen (O2) and all major dissolved N-species (ammonium, nitrate, nitrite, and nitrous oxide [N2O]) in a permeable, freshwater sediment (Rive...
Study on Desulfurization of SO2 by Desulfurization Agent of Attapulgite Compounded with Calcium Oxide
Adsorption Attapulgite Cao Catalysis Desulfurisation SO2
2011/11/15
Sulfur dioxide is one of the major pollutants resulting from fuel combustion. In this study, CaO and attapulgite were utilized as raw material for synthesizing CaO/attapulgite(CaO/ATP) desulfurizer. T...
Magma Interaction Processes Inferred from Fe-Ti Oxide Compositions in the Dölek and Sarıçiçek Plutons, Eastern Turkey
Dö lek and Sarı ç iç ek plutons Eastern Turkey magma interaction magnetite-ilmenite thermometry/oxygen barometry
2009/7/7
Magnetite-ulvöspinel and ilmenite-hematite solid solution intergrowths from the high-K calc-alkaline Dölek and Sarıçiçek plutons, Eastern Turkey, were investigated using m...
High-resolution profiles and nitrogen isotope tracing reveal a dominant source of nitrous oxide and multiple pathways of nitrogen gas formation in the central Arabian Sea
High-resolution profiles nitrogen isotope tracing reveal dominant source of nitrous oxide multiple pathways nitrogen gas formation in the central Arabian Sea
2014/4/22
The oxygen minimum zone (OMZ) of the Arabian Sea is a significant source of nitrous oxide (N2O), yet the metabolism responsible for N2O production is unclear. High-resolution profiles identified peaks...
Direct shock wave loading of Stishovite to 235 GPa: Implications for perovskite stability relative to an oxide assemblage at lower mantle conditions
perovskite stability ower mantle conditions Direct shock
2014/4/8
Pure stishovite and coesite samples with zero porosity
and dimensions appropriate for planar shock wave
experiments have been synthesized with multi-anvil highpressure techniques. The equation of st...
Iron-Oxide Mineralogy of a Mollisol from Argentina: A Study by Selective-Dissolution Techniques, X-Ray Diffraction, and Mossbauer Spectroscopy
Ammonium-Oxalate Dissolution Treatment Chemical Analysis Dithionite-Citrate-Bicarbonate Dissolution Treatment Dithionite-Ethylenediaminetetraacetic Acid Dissolution Treatment
2011/12/6
Abstract: Selective-dissolution techniques by ammonium oxalate (OX), dithionite-citrate-bicarbonate (DCB), and dithionite-ethylenediaminetetraacetic acid (D-EDTA), and X-ray diffraction and M鰏sbauer s...
Laplacian and bond critical point properties of the electron density distributions of sulfide bonds: A comparison with oxide bonds
oxide bonds electron density distributions sulfide bonds VSCCs
2012/3/31
Topologicalandbondcriticalpointpropertiesofelectrondensitydistributions,(r),were
calculatedforaseriesofsul?demolecules,containing?rst-andsecond-rowmaingroup
2(r),showthatthevalenceshellcharge
M-cat...
Use and Limitations of Second-Derivative Diffuse Reflectance Spectroscopy in the Visible to Near-Infrared Range to Identify and Quantify Fe Oxide Minerals in Soils
Crystal Field Bands Diffuse Reflectance Spectroscopy Goethite Hematite Intervalence Charge Transfer Iron Oxides Magnetite
2011/12/8
Abstract: We measured the visible to near-infrared (IR) spectra of 176 synthetic and natural samples of Fe oxides, oxyhydroxides and an oxyhydroxysulfate (here collectively called “Fe oxides”), and of...
Molecular cluster models of aluminum oxide and aluminum hydroxide surfaces
Molecular cluster models aluminum oxide aluminum hydroxide surfaces
2012/4/1
Ab initio, molecular orbital calculations for two different Hartree-Fock basis levels were performed on clusters in the system Al-O-H, and tested by comparing derived vibrational frequencies to the me...
A new uranyl oxide hydrate sheet in vandendriesscheite: Implications for mineral paragenesis and the corrosion of spent nuclear fuel
uranyl oxide hydrate sheet vandendriesscheite Implications mineral paragenesis corrosion spent nuclear fuel
2012/4/6
ThehighmobilityofUinoxidizing?uids,asopposedtoPb ,causesthealterationproductsofPrecambrianuraninitedepositstobecomeprogressivelyenrichedinPbrelative
toU.Inthecaseofleaduranyloxidehydrateminerals,ther...
Sorption Mechanisms of Lanthanum on Oxide Minerals
Electron microscopy Lanthanum Metal-oxides Sorption
2011/12/23
Abstract: The retention of hazardous species, including many of the lanthanides, on soils and sediments is vital for maintaining environmental quality. In this study, high-resolution transmission elec...
Abstract: Boron sorption by hydrous Al-oxide was studied as a function of concentration, pH, temperature and in the presence of oxalate and phosphate. For comparison sorption of B was also measured wi...
Influence of Climate on the Iron Oxide Mineralogy of Terra Rossa
Goethite Hematite Pedoclimate Terra rossa XRD
2011/11/30
Abstract: Terra rossa samples were taken from the B horizons of soil profiles and from cracks within limestone in Italy. The average annual temperature (AAT) of the sites ranged from 8.4 to 20.3°C and...
Influence of Fe(II) on the Formation of the Spinel Iron Oxide in Alkaline Medium
Dissolution Ferrihydrite Maghemite Magnetite Mossbauer spectroscopy
2011/12/31
Fe(II) and Fe(III) in various proportions were coprecipitated by NH3 at pH ≈ 11. The Fe(II)/Fe(III) ratio (x) was varied from 0.10 to 0.50. After stabilization by aging at pH ≃ 8 in anaerobic co...
Iron Oxide-Clay Mineral Association in Brazilian Oxisols: A Magnetic Separation Study
Brazil Goethite Hematite Magnetic separation Oxisols
2011/12/30
Selected Brazilian Oxisols were sampled and submitted to high-gradient magnetic separation (HGMS) to study the iron oxide-clay mineral associations. The soils, derived from four different parent mater...