搜索结果: 1-15 共查到“凹凸棒石 Surfaces”相关记录35条 . 查询时间(0.304 秒)
The role of mineral surfaces in the preservation and transformation of organic carbon: meso- to nano– scale spatial complexity of organic matter forms in organic-rich shales
mineral surfaces preservation transformation organic carbon meso- to nano– scale spatial complexity organic matter forms organic-rich shales
2012/3/30
Sequestration of organic matter (OM) in sediments is a fundamental biogeochemical process that regulates planetary temperature, the flux of free oxygen to the atmosphere and oceans, and the distributi...
Improvements in replica techniques have made possible the high magnification study of textural characteristics and surface features of clay aggregrates found either in nature or in the laboratory. The...
Nanocomposites Based on Montmorillonite/Acrylic Copolymer for Aqueous Coating of Soft Surfaces
Acrylate Aqueous Coating Clay Nanocomposite Emulsion Polymerization
2011/12/14
Nanocomposites based on layered silicate organically modified montmorillonite (Cloisite 20A) and acrylic comonomers (butyl acrylate and methyl methacrylate) were prepared by simple 搃n situ?batch emuls...
MODIFICATION OF FIBROUS SILICATES SURFACES WITH ORGANIC DERIVATIVES – AN INFRARED SPECTROSCOPIC STUDY
FIBROUS SILICATES SURFACES ORGANIC DERIVATIVES
2011/11/7
This contribution explores the interaction of the fibrous silicates, palygorskite, sepiolite and chrysotile with a wide range of organic agents. Infrared spectroscopy (IR) methods are essential for th...
Characterization of Montmorillonite Surfaces after Modification by Organosilane
Clay-Organic Interactions Montmorillonite Organic Coating Silane Surface Modification
2011/12/2
Abstract: X-ray powder diffraction (XRD), thermal gravimetric analysis (TGA), surface area measurements, and near-edge X-ray absorption fine structure (NEXAFS) spectroscopy were used to examine the su...
Chromate Removal by Dithionite-Reduced Clays: Evidence from Direct X-Ray Adsorption Near Edge Spectroscopy (Xanes) of Chromate Reduction at Clay Surfaces
Illite IMt-2 Kaolinite KGa-2 Montmorillonite Reduction Smectite Sorption SWa-1 SWy-1 XANES
2011/12/6
Abstract: Chromium(VI) in the environment is of particular concern because it is toxic to both plants and animals, even at low concentrations. As a redox-sensitive element, the fate and toxicity of ch...
Molecular Dynamics Simulations of the Adsorption of Methylene Blue at Clay Mineral Surfaces
Adsorption of Methylene Blue • Clay Cation-Exchange Capacity Determination • Clay Surface-Area Determination • Molecular Dynamics Simulations
2011/12/6
Abstract: Molecular dynamics simulations were performed of the adsorption of methylene blue (MB) on model beidellite, montmorillonite, and muscovite mica surfaces, using a previously determined empiri...
The interaction of pyrite {100} surfaces with O2 and H2O: Fundamental oxidation mechanisms
The interaction pyrite {100} surfaces with O2 H2O:Fundamental oxidation mechanisms
2012/4/1
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...
Structures of FeTiO3 (0001) surfaces observed by scanning tunneling microscopy
Structures FeTiO3 (0001) surfaces observed scanning tunneling microscopy
2012/4/1
Scanning tunneling microscopy (STM) was used to investigate the (0001) surface structure of a
, following argon-ion sputtering and annealing in O . Low energynatural single crystal of FeTiO
3 2(0001...
Properties of As and S at NiAs, NiS, and Fe1-xS surfaces, and reactivity of niccolite in air and water
NiAs NiS reactivity of niccolite air and water X-ray photoelectron spectroscopic
2012/3/31
Niccolite (NiAs), NiS (high temperature form), and pyrrhotite (Fe S) are structurally related,
with sulfur and arsenic sixfold coordinated. Their fracture or cleavage necessarily produces sur-
hybri...
Formation of Fe-silicates and Fe-oxides on bacterial surfaces in samples collected near hydrothermal vents on the Southern Explorer Ridge in the northeast Pacific Ocean
Formation Fe-silicates Fe-oxides hydrothermal vents Southern Explorer Ridge the northeast Pacific Ocean
2012/4/1
Samples collected in low-temperature (2–508 C) waters near hydrothermal vents of the Southern Explorer Ridge, in the northeast Pacific Ocean, contained fine ( ,500 nm) Fe-and Mn-oxide and Fe-silicate ...
Sulfur and iron surface states on fractured pyrite surfaces
Sulfur iron surface states pyrite surfaces
2012/4/1
Pyrite has a poor {001} cleavage. Unlike most other minerals with a rocksalt-type structure, pyrite typically fractures conchoidally, demonstrating that parting surfaces are not constrained to the {00...
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...
Solid-solid reactions mediated by a gas phase: An experimental study of reaction progress and the role of surfaces in the system olivine+iron metal
Solid-solid reactions olivine+iron metal
2012/4/1
The intergranular fluid involved in solid-solid reactions is tacitly assumed to be a melt or a (C-O-H-S-Cl-F)-bearing phase. We have studied the system olivine 1metal using dif-fusion couple experimen...
Reactivity of Basal Surfaces, Steps and Edges of Muscovite: An AFM Study
AFM Morphology Muscovite Precipitation Reactivity Surfaces
2011/12/8
Abstract: The reactivity of basal surfaces, steps and edges of muscovite was studied by imaging surface precipitates of PbCl2 using atomic force microscopy (AFM). We reacted PbCl2 solution with freshl...