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Petrological vestiges of the Late Jurassic–Early Cretaceous transition from rift to back-arc basin in southernmost Chile: New age and geochemical data from the Capitán Aracena, Carlos III, and Tortuga ophiolitic complexes
Rocas Verdes ophiolites rift to back-arc basin transition U–Pb dating geochemistry mineral chemistry microbes
2017/4/11
The ophiolitic remnants of the Upper Mesozoic Rocas Verdes basin in southernmost South America were studied from
the perspectives of petrography, chemistry of minerals, bulk-rock geochemistry, and U–...
The effect of pH on the uptake of zinc and cadmium in marine phytoplankton: Possible role of weak complexes
zinc cadmium weak complexes
2014/4/4
In natural samples from the New Jersey coast and the Gulf of Alaska, zinc (Zn) and cadmium (Cd) uptake
rates by phytoplankton decreased on average about 30% as pH was decreased from 8.5 to 7.9 or 7.7...
Systematic change in relative stabilities of REE-humic complexes at various metal loading levels
humic substances stability constants metal loading REE pattern binding site
2017/8/9
Complexation of rare earth elements (REEs) with humic substances (HSs) at various REE loading levels was studied by solvent extraction and equilibrium dialysis methods coupled with inductively coupled...
Swelling of Formamide-Montmorillonite Complexes in Polar Liquids
Donor Number Formamide Montmorillonite Osmotic Swelling Polar Liquids Swelling
2011/12/7
Abstract: A new osmotic-swelling system for montmorillonite with formamide (FA) is described. Water and a variety of polar organic liquids were used to swell FA-montmorillonite complexes. The post-swe...
The Structure of U6+ Sorption Complexes on Vermiculite and Hydrobiotite
Cation Exchange EXAFS Sorption Surface Complex Uranium Uranyl Vermiculite XANES XRD
2011/12/7
Abstract: The sorption of the uranyl oxo-cation (UO22+)at different types of binding sites on layer silicate mineral surfaces was investigated. Well-characterized samples of vermiculite and hydrobioti...
Abstract: Divalent tin has been intercalated into montmorillonite by reacting partially hydrolyzed solutions of SnCl2 under aerobic conditions at pH = 2.8 with aqueous dispersions of the smectite mine...
Polyvinyl Alcohol-Clay Complexes Formed by Direct Synthesis
Clays Direct Synthesis Hectorite Hydrothermal Crystallization Polymer Clays Polyvinyl Alcohol PVA
2011/12/27
Abstract: Synthetic hectorite clay minerals were hydrothermally crystallized with direct incorporation of a series of five water-soluble polyvinyl alcohols (PVA) of molecular weights from 9000–146,000...
Intercalation of Al13-Polyethyleneoxide Complexes into Montmorillonite Clay
Al13 Intercalation Microporous Montmorillonite Polyethyleneoxide
2011/12/28
Novel promising modified days adsorbents were synthesized by intercalating hydroxy-Al polymer associated with poly(ethyleneoxide) in the interlayer of montmorillonite. Two different PEOs of low molecu...
The Nature of Polynuclear OH-Al Complexes in Laboratory-Hydrolyzed and Commercial Hydroxyaluminum Solutions
Al13 complexes Aluminum chlorohydrate Polyaluminum chloride Polynuclear OH-Al complexes
2011/12/29
Laboratory-hydrolyzed and commercial OH-Al solutions were characterized using kinetics of Al-ferron color development, kinetics of structural OH neutralization with H+, 27Al NMR spectroscopy, and sulf...
Molecular Structure and Binding Sites of Cobalt(II) Surface Complexes on Kaolinite from X-ray Absorption Spectroscopy
Cobalt EXAFS Kaolinite Sorption Surface complex
2011/12/29
X-ray absorption spectroscopy (XAS) was used to determine the local molecular environment of Co(II) surface complexes sorbed on three different kaolinites at ambient temperature and pressure in contac...
Electric Charge and Surface Characteristics of Hydroxyaluminosilicate- and Hydroxyaluminum-Vermiculite Complexes
Electric charge characteristics Fixation Hydroxy-Al Hydroxyaluminosilicate Specific surface area Vermiculite
2011/12/31
Hydroxyaluminosilicate (HAS) ions prepared from hydroxy-Al (HyA) ions and orthosilicic acid at different NaOH/Al molar and Si/Al atomic ratios were fixed in the interlayer spaces of vermiculite (Vt). ...
Interaction of the Herbicide Acifluorfen with Montmorillonite: Formation of Insoluble Fe3+, Al3+, Cu2+, and Ca2+ Complexes
Adsorption Acifluorfen Infrared spectroscopy Interlayer cations Montmorillonite Pesticides
2011/11/30
Abstract: Analytical, spectroscopic, and X-ray powder diffraction techniques were used to investigate the adsorption of the herbicide sodium acifluorfen (acifluorfen = 5-[2-chloro-4-(trifluoromethyl)p...
Surface Free Energy Components of Clay-Synthetic Humic Acid Complexes from Contact-Angle Measurements
Adsorption Aggregate stability Humic acid Montmoriltonite Surface free energy Wettability
2011/11/30
Abstract: The surface free energy components of clay-organic complexes were determined to assess to what extent an organic adsorbate modified the surface properties of the mineral, insofar as the stab...
Particle Interaction and Rheology of Illite-Iron Oxide Complexes
Bingham yield stress Morphology Illite Iron oxide Particle interaction Zeta potential
2011/12/31
The Bingham yield stress for suspensions of illite-iron oxide complexes is examined as a function of pH and iron oxide content. Addition of iron oxides to illite increased the yield stress over a pH r...
Clay-Organic Complexes as a Cementing Agent in the Arahama Sand Dune, Japan
Cementing agent Clay-organic complex Gel Sand dune Scanning auger multiprobe analysis Transmission electron microscopy X-ray photoelectron spectroscopy
2012/1/5
Cementing materials in the Arahama sand dune, Japan, were studied mineralogicaUy and biogeochemically to gain a better understanding of the cause of hardening. The cementing material is a clay- organi...