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Mossbauer Spectroscopic Evidence for Citrate-Bicarbonate-Dithionite Extraction of Maghemite from Soils
Mossbauer spectroscopy Soil genesis
2011/12/1
Abstract: In a previous paper, we used powder X-ray diffraction and changes in magnetic susceptibility to argue the importance of pedogenic maghemite to soils and the efficacy of the chemical extracta...
The Electrophoretic Mobility of Imogolite and Allophane in the Presence of Inorganic Anions and Citrate
Anion adsorption Cryolite Inner-sphere complex Outer-sphere complex Point of zero charge Point of zero mobility Specific adsorption
2011/12/30
The purpose of this study was to investigate bonding mechanisms of representative inorganic anions and citrate with imogolite and allophane using electrophoresis. The electrophoretic mobility (EM) of ...
Dithionite as a Dissolving Reagent for Goethite in the Presence of EDTA and Citrate. Application to Soil Analysis
Dithionite Goethite Iron analysis Iron dissolution
2011/12/31
A synergistic effect of reductant and complexant is observed in the dissolution of goethite by dithionite and citrate or EDTA. The rate data are interpreted using the surface complexation approach to ...
Influence of Citrate on the Kinetics of Fe(II) Oxidation and the Formation of Iron Oxyhydroxides
Citrate Goethite Hydrolysis Iron oxyhydroxide Lepidocrocite Oxidation
2011/11/30
Abstract: The rate of Fe(II) oxidation at a constant rate of oxygen supply in the presence of citrate was measured at pH 6.0 at various citrate/Fe(II) molar ratios at 23.5°C in 0.01 M ferrous perchlor...
Optical Density of Vertisol Clay Suspensions in Relation to Sediment Volumes and Dithionite-Citrate-Bicarbonate-Extractable Iron
Beidellite Extractable Fe Fabric Optical density Tactoid Vertisol
2012/1/11
Clay fractions of eight vertisols and vertisolic soils from Israel were found to consist principally of a Fe-rich beidellite. Sediment volumes of Na-clay suspensions, obtained in measuring cylinders a...