搜索结果: 46-60 共查到“矿床学与矿相学 Palygorskite”相关记录98条 . 查询时间(0.031 秒)
Sorption–desorption of cadmium in aqueous palygorskite, sepiolite,and calcite suspensions: Isotherm hysteresis
Cd Hysteretic adsorption Release Reversibility
2011/11/4
Sorption isotherms have been widely used to assess the heavy metal retention characteristics of soil particles. Desorption behavior of the retained metals, however, usually differ from that of sorptio...
Sorption of cadmium on palygorskite, sepiolite and calcite:Equilibria and organic ligand affected kinetics
Cd Kinetic Equilibrium Desferrioxamin B Citrate Acetate
2011/11/4
Quantity, affinity and rate of heavy metals retention by soil constituents can greatly influence the mobility and bioavailability of these metals
in soil environments. Equilibrium and kinetic studies...
On the structure of palygorskite by mid- and near-infrared spectroscopy
IR spectroscopy palygorskite NIR spectroscopy Fe-rich hormite hydration
2011/11/4
The OH-structural characteristics of an iron-rich palygorskite from Western Macedonia, Greece (Gr-1) and an aluminous palygorskite from Florida (PFl-1) were examined by combined Fourier-transform near...
Macroscopic palygorskite fromLisbomVolcanic Complex
palygorskite macrocrystalline palygorskite electron microscopy powder diffraction FTIR spectroscopy
2011/11/4
The palygorskite of the Volcanic Complex near of Lisbom (Portugal) is particular both in the size of the fibres and in chemical composition. It appears as veins of very pure mineral. From hand specime...
Aspects of cationic dye molecule adsorption to palygorskite
Palygorskite Adsorption Methylene blue Crystal violet BET Groundwaterl Dissolved ions PACS
2011/11/4
This paper presents a study on the adsorption of cationic dyes, methylene blue and crystal violet, from aqueous solutions (distilled water and actual groundwater) onto palygorskite clay. In particular...
Tensile strength of sand, palygorskite and calcium carbonate mixtures and interpretation with the effective stress theory
Indirect tensile strength Palygorskite Calcium carbonate Effective stress Compaction Central Iran
2011/11/4
Many soils in arid regions of the world including those of central Iran contain palygorskite and carbonates in their mineral fraction. There is, however, little information on the effects of these min...
Characteristics of Titanocene Catalyst Supported on Palygorskite for Ethylene Polymerization
Playgorskite supported catalyst ethylene polymerization Lewis acidity
2011/11/4
A series of heterogeneous catalysts with Cp2TiCl2 supported on palygorskite were prepared and evaluated by ethylene slurry polymerizations. The so-called direct supported catalyst, for which the pretr...
Preparation and pervaporation of a palygorskite/polyacrylamide inorganic-organic hybrid membrane for separating m-/p-xylene isomers
Pervaporation Hybrid membrane Intercalation polymerization Palygorskite Xylene isomers
2011/11/8
Preparation and pervaporation of a palygorskite/polyacrylamide inorganic-organic hybrid membrane for separating m-/p-xylene isomers.
Catalytic thermal reactions of cumene over sepiolite and palygorskite
catalytic thermal reactions sepiolite palygorskite
2011/11/10
The catalytic activity of sepiolite and palygorskite in cracking and disproportionation reactions of cumene was studied. The formation of benzene, diisopropylbenzene and propylene characterizes Br鰊ste...
Quantitative Estimation of Palygorskite using thermogravimetric Analysis in Paleosols from Sepahanshahr, Isfahan, Iran
Quantitative Estimation Palygorskite thermogravimetric Analysis
2011/11/4
Palygorskite accounts for a major portion of the minerals present in paleosols in the central Iranian plateau. The identification and quantitative determination of this clay mineral is of great import...
The effects of palygorskite on chemical and physico-chemical properties of soils: a review
Palygorskite Soil-physical-chemistry Irrigated-agriculture Rheology Flocculation Clay-migration Disaggregation Dispersion
2011/11/4
Very little was known about how palygorskite affects soil properties when it constitutes a significant component of the soil clay fraction. This constituted a serious impediment for the proper managem...
Crystal structure refinement of palygorskite from neutron powder diffraction
palygorskite structure neutron powder refinement zeolitic water clay mineral
2011/11/4
Palygorskite is a Mg-rich fibrous clay, present in nature as a mixture of two intricately intertwined polymorphs –monoclinic (C2/m) and orthorhombic (Pbmn) –characterized by the presence of channels a...
FORMATION OF SEPIOLITE-PALYGORSKITE AND RELATED MINERALS FROM SOLUTION
Activity Diagrams Clays Kerolite Palygorskite Saponite Sepiolite Solution
2011/11/4
Most of the world’s sepiolite-palygorskite precipitates in lacustrine and perimarine environments. Although these minerals can transform from precursor minerals, the most common formation mechanism in...
Palygorskite genesis through silicate transformation in Tunisian continental Eocene deposits
palygorskite illite Tunisia Eocene
2011/11/2
The mineralogical and geochemical characteristics of Eocene continental sedimentsin south central Tunisia (Chebket Bouloufa and Jebel Hamri) and in north central Tunisia (Jebel Lessouda and Jebel Rhe磑...
Determination of Total Acid in Palygorskite Chemically Modified by N-Butylamine Thermodesorption
palygorskite lanthanum thermodesorption acid catalyst
2011/11/3
The acid properties of palygorskite clay (R1) were studied using n-butylamine as probe molecule.A comparison was made of these properties in palygorskite clay (R1), in an acidified palygorskite (R2) a...