Results 181 to 190 of about 17,623 (218)
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Communications in Soil Science and Plant Analysis, 2007
Abstract Goethite, aluminum‐(Al)‐substituted goethite (GA2), and a system of kaolinite–goethite were examined for their ability to adsorb copper (Cu), zinc (Zn), and cadmium (Cd) as a function of pH, in two ionic strengths and two different metal concentrations. Specific surface area was determined by BET‐N2, whereas the charge development on the solid
Emmanuel Spathariotis +1 more
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Abstract Goethite, aluminum‐(Al)‐substituted goethite (GA2), and a system of kaolinite–goethite were examined for their ability to adsorb copper (Cu), zinc (Zn), and cadmium (Cd) as a function of pH, in two ionic strengths and two different metal concentrations. Specific surface area was determined by BET‐N2, whereas the charge development on the solid
Emmanuel Spathariotis +1 more
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Gibbsite and Goethite Solubility
Soil Science Society of America Journal, 20052‐Ketogluconate (kG) is a microbial byproduct that has been isolated from the rhizosphere of several plants and has been found to accumulate around bacteria adhering to rock surfaces. It has long been suspected that kG may play a role in enhancing the bioavailability of soil nutrients.
Michael E. Essington +2 more
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Kinetics of phosphate sorption by goethite‐ and bentonite‐goethite (b‐g) system
Communications in Soil Science and Plant Analysis, 1998Abstract The study of phosphate (PO4) fixation due to reactions which occur to the surface of soil minerals has been limited by a lack of evidence on which a structural model may be based. A structural model should attempt at least to describe the coordination on the absorbed PO4 3‐ ion, that is, to indenfity the immediate neighbour atoms or ions in ...
Anthoula Dimirkon, Andreas Ioannou
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Comparison of Selenate and Sulfate Adsorption on Goethite
Journal of Colloid and Interface Science, 2001The adsorption behavior of selenate (SeO(4)) on goethite has been studied under a wide range of conditions. SeO(4) adsorption has been compared with the binding of SO(4). The experimental results are interpreted in view of very recent spectroscopic work on the speciation and coordination of adsorbed selenate and sulfate on goethite.
Rietra, R.P.J.J. +2 more
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Transformation of Hematite to Goethite in Soils
Nature, 1971IN many parts of the world, especially in those that were not glaciated during the Pleistocene epoch, red hematitic soils that formed in a previous climate (different from the present one) still exist. In regions where the present climate is cooler and more humid than the previous one, the red colour seems to be disappearing and being replaced by more ...
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Studies on the oxidation of goethite
Economic Geology, 1961Goethite on heating in air, undergoes both oxidation and dehydration. X-ray investigations of the heat-treated samples of goethite at different temperatures indicate hydrogoethite, maghemite (hydro?) and hydrohematite as intermediate products prior to the conversion into hematite.
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The stability of goethite on Mars
Journal of Geophysical Research, 1966Polarization and visible and infrared reflectivity studies of Mars and of various minerals and rocks have been interpreted as implying that a significant part of the Martian surface material is finely divided limonite—a mixture of iron oxides and hydroxides—but principally the monohydrate, goethite.
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Dehydration of goethite and diaspore
Zeitschrift für Kristallographie - Crystalline Materials, 1963openaire +1 more source