搜索结果: 1-15 共查到“地质学 Smectites”相关记录70条 . 查询时间(0.089 秒)
Stability of Mg-sulphate minerals in the presence of smectites: Possible mineralogical controls on H2O and nutrient cycling on Mars
Stability Mg-sulphate minerals presence of smectites mineralogical controls H2O nutrient cycling Mars
2012/3/30
Hydrated sulphate minerals, including kieserite (MgSO4·H2O), gypsum (CaSO4·2H2O), and bassanite (CaSO4·~0.5H2O), have been detected on Mars (Gendrin et al., 2005; Wray et al., 2010), and polyhydrated ...
Diagenesis of Dioctahedral and Trioctahedral Smectites from Alternating Beds in Miocene to Pleistocene Rocks of the Niigata Basin, Japan
Chlorite-Smectite Clay Mineral Diagenesis C-S Geothermometer Illite-Smectite I-S Niigata Basin Saponite
2011/12/5
Abstract: Clay mineral diagenesis in the Niigata basin is documented by mineralogical and chemical analysis of clay minerals from cuttings from the Shinkumoide SK-1D (SSK-1D) well which is characteriz...
Formation and Growth of Smectites in Bentonites: A Case Study from Kimolos Island, Aegean, Greece
Bentonite Crystal Growth Montmorillonite Mordenite Open System Particle-Size Distribution Precursor Random Ripening
2011/12/5
Abstract: The low-temperature alteration of a rhyolitic rock from Kimolos Island, Aegean, Greece, yielded an alteration profile characterized by gradual transition from fresh glass to bentonite contai...
Pedogenic Smectites in Podzols from Central Finland: An Analytical Electron Microscopy Study
Analytical Electron Microscopy Finland High-Resolution Transmission Electron Microscopy Podzols Smectites
2011/12/6
Abstract: Transmission electron microscopy (TEM) including high-resolution transmission electron microscopy (HRTEM) and analytical electron microscopy (AEM) were used to study the fine clay fraction (...
Adsorption Kinetics of Pentachloroethane by Iron-Bearing Smectites
CMS Clay SWa-1 CMS Clay NG-1 Dehydrochlorination Iron(II) Iron(III) Montmorillonite Nontronite Oxidation Pentachloroethane Reduction Reactions Tetrachloroethene
2011/12/2
Abstract: The oxidation state of structural Fe greatly alters surface chemistry, which may have a large influence on clay-organic interactions. The effect of structural-iron oxidation state on chlorin...
Enhanced Thermal Stability of Al-Pillared Smectites Modified with Ce and La
Bentonite Ce La Pillared Clays
2011/12/6
Abstract: A commercial bentonite (primarily smectite) from Fischer Scientific Company (F bentonite) and a natural bentonite from Peru (P bentonite) were used in the preparation of pillared clays with ...
A Model for the Mechanism of Fe3+ to Fe2+ Reduction in Dioctahedral Smectites
CMS Source Clay SWa-1 Dioctahedral Smectite Iron Reduction Structural Formula
2011/12/5
Abstract: A model to compensate the 2:1 layer having excess negative charge owing to the reduction of Fe3+ to Fe2+ by sodium dithionite buffered with citrate-bicarbonate in nontronite, beidellite, and...
Effects of Exchange Cations and Layer-Charge Location on Cysteine Retention by Smectites
Cysteine CMS Source Clay SAz-1 FTIR Homoionic Smectites Layer Charge Thermal Analysis XRD
2011/12/7
Abstract: This study investigates the complexes formed between amino acids, which are the natural degradation products of organic matter, and smectites. Thus, the adsorption and desorption behavior of...
Smectites in Iron-Rich Calcareous Soil and Black Soils of Taiwan
Black Soils Iron-Rich Calcareous Soil Mollisols Smectite Vermiculite Vertisols
2011/12/7
Abstract: The iron-rich calcareous soil (Typic Rhodustalf) from the Penghu island group represents a volcanic area. The black soils (Typic Haplustert, Vertic Endoaquoll, Typic Hapludolls) are typical ...
Clay Mineralogy and Occurrence of Ferrian Smectites between Serpentinite Saprolites and Basalts in Biga Peninsula, Northwest Turkey
Alteration Basalt Beidellite Ferric Iron Mica Schist Montmorillonite Serpentinite Turkey
2011/12/7
Abstract: The clay mineralogy of an oxisol-saprolite overlying serpentinite and underlying basalt was studied with different techniques to evaluate the clay mineral transformation that occurred and to...
Layer-Charge Heterogeneity in Smectites of I-S Phases in Pelitic Sediments from the Molasse Basin, Austria
Alkylammonium Method Austria Charge Heterogeneity Illite-Smectite K-Fixation Molasse Basin
2011/12/8
Abstract: The purpose of this study was to characterize more fully the surface charge characteristics of the end-member smectite in illite-smectite (I-S) mixed-layer phases found previously in pelitic...
Characterization of Intercalated Smectites Using XRD Profile Analysis in the Low-Angle Region
Montmorillonite Profile Analysis Smectite XRD
2011/12/2
Abstract: X-ray diffraction (XRD) characterization of natural and intercalated smectites is usually limited to the apparent d-value estimated from the peak maxima in the raw data. This can lead to the...
Relation of Water and Neutral Organic Compounds in the Interlayers of Mixed Ca/Trimethylphenylammonium-Smectites
Adsorption Organoclay Smectite TMPA
2011/12/2
Abstract: Organoclays were prepared by exchanging Ca2+ in a Ca2+-saturated smectite partially or fully with trimethylphenylammonium (TMPA) cations. The mechanistic function of these organoclays as ads...
Swelling and Texture of Iron-Bearing Smectites Reduced by Bacteria
Bacteria Biological Reduction Organo-Clay Interactions Smectites Structural Iron Swelling Pressure Texture
2011/12/8
Abstract: Microbial reduction of clay mineral structural Fe(III) decreases the swelling of nontronite gels, most importantly at intermediate oxidation states (40 to 80 cmol Fe(II) kg−1 clay). Th...
Interaction of Rimsulfuron with Smectites
Adsorption Infrared Spectroscopy Pesticides Rimsulfuron Smectites
2011/12/1
Abstract: The adsorption of the sulfonylurea herbicide rimsulfuron, [N-((4,6-dimethoxypyrimidin-2-yl)aminocarbonyl)-3-(ethylsulfonyl)-2-pyridinesulfonamide], on clay minerals with different saturating...