搜索结果: 1-15 共查到“地质学 Ion exchange”相关记录15条 . 查询时间(0.125 秒)
Ion Exchange of Zeolite Na-Pc with Pb2+, Zn2+, and Ni2+ Ions
Heavy Metals Ion Exchange Perlite Selectivity Selectivity Coefficient Zeolite Pc Zeolitization
2011/12/6
Abstract: This paper examines the ion-exchange properties of synthetic zeolite Na-Pc, which was produced from perlite-waste fines and has a SiO2:Al2O3 ratio of 4.45:1 and a cation-exchange capacity (C...
Layer Charge of the Expandable Component of Illite/Smectite in K-Bentonite as Determined by Alkylammonium Ion Exchange
Alkylammonium Bentonite Clays Diagenesis Illite Illite/smectite Layer charge Smectite
2011/12/27
The charge of the expandable interlayers in a series of fourteen diagenetic illite/smectites (I/S) from lower Paleozoic K-bentonites was determined by the alkylammonium ion exchange method. The magnit...
Use of Competitive Ion Exchange for Intercalation of Montmorillonite with Hydroxy-Aluminum Species
Competitive ion exchange Hydroxy-Al Intercalation Montmorillonite Pillared clays Thermal stability X-ray powder diffraction
2012/1/4
Three montmorillonite samples, from Wyoming (particle size <0.2 µm, 4.6 wt. % Fe2O3), Greece (<14 µm, 6.5 wt. % Fe2O3), and Poland (0.5 wt. % Fe2O3, two fractions <2 µm and 2–10 &mic...
Ion Exchange, Thermal Transformations, and Oxidizing Properties of Birnessite
Birnessite Bixbyite Buserite Cation exchange Cryptomelane Hausmannite Hollandite Oxidation Thermal treatment
2012/1/12
Synthetic sodium birnessite, having a cation-exchange capacity (CEC) of 240 meq/100 g (cmol/kg) was transformed into Li, K, Mg, Ca, Sr, Ni, and Mn2+ cationic forms by ion exchange in an aqueous medium...
Methyl t-Butyl Ether (MTBE) Production: A Comparison of Montmorillonite-Derived Catalysts with an Ion-Exchange Resin
Amberlyst 15 Catalysis Chlorhydrol Ion-exchange resin Methyl t-butyl ether Montmorillonite
2012/1/13
Montmorillonite-based catalysts were compared with an acidic ion-exchange resin of the type used industrially for the production of methyl t-butyl ether (MTBE) from methanol and isobutene or t-butanol...
Dissolution Kinetics of Phlogopite. II. Open System Using an Ion-Exchange Resin
Dissolution Ion-exchange resin Kinetics Open system Mica Phlogopite
2012/2/8
The rate of dissolution of phlogopite in an open system was measured at low temperature and pressure and at pH 3–5. The maximum dissolution rate was achieved by maintaining extremely low ionic concent...
Fe2+-Fe3+ Transformations in Clay and Resin Ion-Exchange Systems
Adsorption Electron transfer Ion-exchange resin Iron Oxidation Smectite
2012/2/9
The pH, Eh, electrical conductivity (EC), and the amounts and valency of replaceable iron were measured periodically on Fe2+- and Fe3+-saturated montmorillonite and cation-exchange resin at three temp...
The Interaction Between Roundup (Glyphosate) and Montmorillonite. Part II. Ion Exchange and Sorption of Iso-Propylammonium by Montmorillonite
Adsorption Exchange Glyphosate Herbicide Iso-propylammonium Montmorillonite
2011/11/18
Abstract: The adsorption mechanism of iso-propylammonium (PAH+), the cationic component of Roundup, by various homoionic montmorillonites and the structures of the associations obtained in the interla...
Ion-Exchange Properties of the Natural Zeolite Erionite
Erionite Ion exchange Offretite Selectivity Zeolite Zeolite T
2012/2/10
Natural erionite was exhaustively ion exchanged with Na+ to give the anhydrous unit-cell composition (K1.9Na5.4Ca0.1Mg0.1)[(AlO2)7.4(SiO2)28.6]. A thermodynamic study of alkali and alkaline earth meta...
Ion Exchange and Intersalation Reactions of Hectorite with Tris-Bipyridyl Metal Complexes
Bipyridyl Exchange Hectorite Intersalation Tris-bipyridyl
2012/2/10
The binding of tris-bipyridyl metal complexes of the type M(bp)32+ (M = Fe2+, Cu2+, Ru2+) to hectorite surfaces is shown to occur by two mechanisms: (1) replacement of Na+ ions in the native mineral b...
Adsorption Of Ethylenediamine (EDA) On Montmorillonite Saturated with Different Cations—V. Ammonium- and Triethylammonium-Montmorillonite: Ion-Exchange, Protonation and Hydrogen-Bonding
Triethylammonium-Montmorillonite Adsorption Ethylenediamine
2012/2/15
On NH4- as well as on (C2H5)3NH-montmorillonite EDA was adsorbed in protonated form. The extent of protonation depended on the relative basicities and concentrations of the interacting compounds. In t...
Adsorption of Ethylenediamine (EDA) on Montmorillonite Saturated with Different Cations IV: Al-, Ca- and Mg-Montmorillonite: Protonation, Ion-Exchange, Co-ordination and Hydrogen-Bonding
Adsorption Ethylenediamine Montmorillonite Hydrogen-Bonding
2012/2/14
Ethylenediamine (EDA) adsorbed from aqueous solution or vapor phase on Al-, Ca- and Mg-montmorillonite was retained to a more or less large extent in protonated form. The NH3+ :NH2 ratio decreased wit...
Adsorption of Ethylenediamine (EDA) on Montmorillonite Saturated with Different Cations—III. Na-, K- and Li-Montmorillonite: Ion-Exchange, Protonation, Co-Ordination and Hydrogen-Bonding
Adsorption of Ethylenediamine Montmorillonite Co-Ordination Hydrogen-Bonding
2011/11/18
Abstract: Ethylenediamine (EDA) is adsorbed from aqueous solution on Na-, K- and Li-montmorillonite as the monoprotonated cation (EDAH+) through an ion-exchange process. On washing with distilled wate...
Properties of Reduced Charge Montmorillonite: Tetra-Alkylammonium Ion Exchange Forms
Montmorillonite Tetra-Alkylammonium Ion Exchange Forms
2012/2/15
Surface properties of reduced charge montmorillonites (RCM) whose exchange capacities were saturated with tetra-alkylammonium cations, were studied with X-ray diffraction, nitrogen, and water adsorpti...
pH Dependent Ion Exchange Properties of Soils and Clays from Mazama Pumice
pH Ion Exchange Properties Soils Clays
2012/2/20
Cation exchange capacity (CEC) measurements were made for whole pumice soil samples by several methods, including standard procedures involving cation saturation, excess salt removal, and cation displ...