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Neodymium isotopic composition and concentration in the Southwest Pacific Ocean
Southwest Pacific Nd isotopic composition Antarctic Intermediate Water (AAIW) Upper and Lower Circumpolar Deep Waters (UCDW and LCDW) GEOTRACES
2017/4/11
We report two vertical profiles of the concentration and isotopic composition of neodymium (Nd) in seawater samples
collected at 20°S and 30°S along a longitude of 170°W in the Southwest Pacific Ocea...
Facile Enrichment and Photocatalytical Degradation of Low Concentration MB in Aqueous Solution
Absorbent Anatase Titania Attapulgite Decantation Enrichment Photodegradation Simple Separation
2011/11/15
Fine particles of photoactive anatase-type TiO2, prepared by hydrolysis of tetrabutyl orthotitanate and crystallized under microwave (MV) irradiation, were loaded on adsorbent support attapulgite (ATP...
Rheology of Na-Rich Montmorillonite Suspension as Affected by Electrolyte Concentration and Shear Rate
Clay-particle Interaction Clay-suspension Viscosity Na-rich Montmorillonite
2011/12/5
Abstract: Rheological measurements were used to evaluate the particle-particle associations of Na-rich montmorillonite in suspensions, under various electrolyte concentrations. A 2% free electrolyte c...
Adsorption of 137Cs on Montmorillonite and Illite: Effect of Charge Compensating Cation, Ionic Strength, Concentration of Cs, K and Fulvic Acid
Cesium Illite Ion Exchange Montmorillonite Radiocesium Selectivity Soil
2011/12/9
Abstract: A thorough understanding of the capacity of clay minerals to adsorb radiocesium is essential in order to predict the fate of this pollutant in the environment and to interpret routine measur...
The Sol Concentration Effect in n-Butylammonium Vermiculite Swelling
CAT DLVO theory Neutron diffraction Osmotic swelling Phase transitions Salt fractionation Trapped salt Vermiculite gels
2011/12/29
The swelling of n-butylammonium vermiculite in water was investigated as a function of the sol concentration (r), the salt concentration (c) and the temperature (T).The interlayer spacing in the gel p...
Transformations of Synthetic Birnessite as Affected by pH and Manganese Concentration
Birnessite Manganese oxides Mn2+ concentration pH Structural conversion TEM XRD
2011/12/29
The amount of Mn2+ adsorbed or removed from solution by birnessite is several times greater than its reported cation exchange capacity. Extractability of the sorbed Mn2+ decreases with aging. It is un...
Development of Ammonium-Saponites from Gels with Variable Ammonium Concentration and Water Content at Low Temperatures
Cation exchange capacity Infrared spectroscopy Saponite Synthesis Thermal analysis Transmission electron microscopy X-ray powder diffraction
2011/12/1
Abstract: Ammonium-saponite is hydrothermally grown at temperatures below 300°C from a gel with an overall composition corresponding to (NH4)0.6Mg3Si3.4Al0.6O10(OH)2. The synthetic saponite and co-exi...
Influence of Calcium and Sodium Concentration on the Microstructure of Bentonite and Kaolin
Aggregation Bentonite Electrolyte Flocculation Kaolin Scanning electron microscopy
2012/1/5
The influence of added sodium and calcium nitrate electrolyte on the particle aggregates in the colloid fraction of natural bentonite and kaolin was studied. Clays were flocculated in distilled water ...
Rheological Behavior of Na-Montmorillonite Suspensions at Low Electrolyte Concentration
Electrolyte Montmorillonite Particle attraction Rheology Shear Viscosity
2011/11/30
Abstract: The prevailing concept that positive-edge to negative-face attraction accounts for the rheological behavior of montmorillonite suspensions at low electrolyte concentration was investigated. ...
The 5-M-NaOH Concentration Treatment for Iron Oxides in Soils
Aluminum Gibbsite Goethite Hematite Iron Kaolinite Leaching
2012/2/8
The boiling 5-M-NaOH treatment was found to aid in the identification and characterization of goethite and hematite by effectively concentrating the two Fe oxides in kaolinitic-gibbsitic soil clays. N...
Influence of pH, Concentration, and Chelating Power of Organic Anions on the Synthesis of Aluminum Hydroxides and Oxyhydroxides
Aluminum hydroxide Aluminum oxyhydroxide Carboxylic acid Chelation Crystallization Pseudoboehmite
2012/2/9
Chelating organic acids hampered the hydrolytic reactions of Al and affected the nature of the crystalline aluminum hydroxides. Chemical composition, structure, size, nature of functional groups, and ...
Electro-Optic Investigation of the Permanent and Induced Dipoles of Montmorillonite as Affected by Electrolyte Concentration
Electro-Optic Investigation Montmorillonite Electrolyte Concentration
2012/2/15
An electro-optic birefringence technique was employed to study the orientation mechanism of montmorillonite in an electric field. The instantaneous reversal of the field polarity produced evidence of ...
Electrolyte Concentration-Permeability Relationships in Sodium Illite-Silt Mixtures
Electrolyte Concentration-Permeability Relationships Sodium Illite-Silt Mixtures
2012/2/15
To examine the effects of clay swelling and dispersion on electrolyte concentration-permeability relationships of low clay content soils, flow experiments were conducted on a silt of fixed particle si...
The Transference Numbers of the Counter-Ions in Montmorillonite Paste as a Function of Water Film Thickness and Electrolyte Concentration
Counter-Ions Montmorillonite Paste Electrolyte Concentration
2012/2/15
The transference numbers of the counter ions in montmorillonite paste are determined as a function of the thickness of the water film (h) and of the diffuse double layer (1/κ).From measured E.M.F. val...
Trace Element Concentration in Amorphous Clays of Volcanic Ash Soils in Oregon
Trace Element Concentration Amorphous Clays Volcanic Ash Soils
2012/2/20
Clay fractions in soils from a transect of the Mazama ash deposit (6600-yr-old) contained more than 80% amorphous material. Instrumental neutron activation analysis was used to compare the trace eleme...