搜索结果: 1-15 共查到“地质学 Hectorite”相关记录22条 . 查询时间(0.077 秒)
Effects of Clay Fraction and Temperature on the H2O Self-Diffusivity in Hectorite Gel: A Pulsed-Field-Gradient Spin-Echo Nuclear Magnetic Resonance Study
Complexity of Pore Structure Hectorite H2O NMR Self-Diffusion
2011/12/6
Abstract: Self-diffusion coefficients of H2O molecules in Na-rich hectorite gel were measured by 1H nuclear magnetic resonance (NMR). Spin-echo pulse sequences with magnetic field gradient pulses for ...
Sorption of Benzene, Toluene, Ethylbenzene, and Xylene (BTEX) Compounds by Hectorite Clays Exchanged with Aromatic Organic Cations
Adsorptive Organoclays Aromatic Cations BTEX Hectorite Natural Clays Organophilic Organoclays Smectite Sorption Unleaded Gasoline X-Ray
2011/12/7
Abstract: Adsorptive-type organoclays, where hydrocarbons adsorb directly to the siloxane surfaces, were studied to find new organic cations and to determine the parameters that produce effective sorb...
Polymerization of Benzene and Aniline on Cu(II)-Exchanged Hectorite Clay Films: A Scanning Force Microscope Study
Aniline Benzene Hectorite Scanning Force Microscopy
2011/12/27
The technique of scanning force microscopy (SFM) was used to study the nanometer-scale structure of Cu(II)-exchanged hectorite thin films. Supporting data were also obtained from Electron Spin Resonan...
Mobility of Small Molecules in Interlayers of Hectorite Gels: ESR Study with an Uncharged Spin Probe
ESR Hectorite Molecular mobility
2011/12/29
Electron spin resonance (ESR) spectroscopy was used to measure the rotational mobility of an uncharged nitroxide spin probe (4-hydroxy-2,2,6,6-tetramethyl-piperidinyloxy) in hectorite gels of variable...
X-ray Photoelectron Spectroscopic Study of Cobalt(II) and Nickel(II) Sorbed on Hectorite and Montmorillonite
Cation exchange Cobalt Hectorite Ligand exchange Montmorillonite Nickel X-ray photoelectron spectroscopy
2011/11/30
Abstract: The safe disposal of 60Co, 63Ni, and 59Ni has required considerable information on the interactions of Co2+ and Ni2+ with clay minerals in the geosphere. X-ray photoelectron spectroscopy (XP...
DLVO and Non-DLVO Interactions in Hectorite
Colloid Contact angle DLVO theory Electrostatic forces Hectorite Polar forces
2012/1/4
The Derjaguin-Landau-Verwey-Overbeek (DLVO) theory sums the attractive van der Waals and repulsive electrostatic forces as a function of separation distance to predict the interaction between charged ...
Visible Spectroscopy of Methylene Blue on Hectorite, Laponite B, and Barasym in Aqueous Suspension
Adsorption Barasym Hectorite Laponite Methylene blue Sepiolite Visible spectroscopy
2012/1/9
The absorption spectra of methylene blue ion exchanged on hectorite, Laponite B, Barasym, or sepiolite in dilute aqueous suspensions show the presence of the monomer, the protonated monomer, the dimer...
Chemisorption of Copper on Hydroxy-Aluminum-Hectorite: An Electron Spin Resonance Study
Adsorption Aluminum Copper Electron spin resonance Hectorite Hydroxy-aluminum complex
2012/2/6
Copper adsorption on a hydroxy-aluminum-hectorite complex (OH-Al-hectorite) at pH 4.5, 5.7, 7.4, and 7.8 was examined by means of electron spin resonance. The spectra of these samples were compared to...
Exchange and Spectroscopy of Cationic Rhodium Complexes on Hectorite
Catalysis Cation exchange Hectorite Phosphine Rhodium
2012/2/3
The exchange of Rh(NBD)(Pφ3)2+, Rh(NBD)(PMe2φ)3+, Rh(COD)(Pφ3)2+, and Rh(PMe2φ)4+ on hectorite was studied in methanol/dichloromethane, acetone, dimethylformamide, and acetonitrile. At low initial Rh+...
Hydrolysis and Decomposition of Hectorite in Dilute Salt Solutions
Electrical conductivity Hectorite Hydrolysis Hydroxy-Al polymers Salt solution
2012/2/7
The hydrolysis and decomposition of M-hectorite (M being Na, Li, Mg, or Ca) in dilute solutions of M-chlorides were studied by recording the changes in electrical conductivity (EC) of the clay suspens...
Hydrolysis and Dehydration Reactions of Exchangeable Cu2+ on Hectorite
Copper Dehydration Electron spin resonance Hectorite Hydrolysis Water
2012/2/7
Electron spin resonance (ESR) analysis of Cu2+-hectorite suspensions provides evidence for the surface-induced hydrolysis of Cu(H2O)62+ at low pH and surface-inhibited hydrolysis (or precipitation) at...
Properties of Silica-Intercalated Hectorite
Acidity Hectorite Infrared spectroscopy Intercalation Silica Surface area
2012/2/8
Silica-intercalated hectorite with an 001 spacing of 12.6 侌 and a N2 BET surface area of 220 m2/ g was prepared by hydrolysis and oxidation at 500亱C of hectorite containing a silicon acetylacetonate c...
Proton Nuclear Magnetic Resonance Studies of “One-Layer” Hydrates of Oriented Hectorite
Hectorite Hydrate Nuclear magnetic resonance
2011/11/22
Proton Nuclear Magnetic Resonance Studies of “One-Layer” Hydrates of Oriented Hectorite.
Metallation-Demetallation Reaction of Tin Tetra(4-Pyridyl) Porphyrin in Na-Hectorite
Adsorption Demetallation Hectorite Luminescence Metallation Porphyrin Tin
2012/2/8
The adsorption of Sn(IV)TPyP (mesotetrapyridylporphyrin) in sodium hectorite was studied using ultraviolet-visible and luminescence spectroscopy. The adsorbed complex was found to demetallate forming ...
Complexes of Diethylenetriamine (DIEN) and Tetraethylenepentamine (Tetren) with Cu (II) and Ni (II) on Hectorite
Amines Complexes Hectorite Spectroscopy Thermal Stability Transition Metals
2012/2/10
The nature of the complexes in aqueous solutions of Cu(II) and Ni(II) with diethylenetriamine (dien) and tetraethylenepentamine tetren) is pH-dependent. At M(II):dien = 2 and M(II):tetren = 1, the mai...