Results 1 to 10 of about 4,544 (181)

Morphology of synthetic goethite particles

Journal of Colloid and Interface Science, 2004
The specific surface area of synthetic goethite depends on the preparation: the Fe(III):OH ratio, the rate of base titration of Fe salt, and the temperature and time of crystallization. The crystals also have different morphologies as determined by SEM or TEM. Carbon coating is used to improve the quality of SEM images of nonconducting specimens.
Kosmulski, Marek, Durand-Vidal, Serge, Macszka, Edward, Rosenholm, Jarl   +3 more
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Water Vapor Adsorption on Goethite

Environmental Science & Technology, 2013
Goethite (α-FeOOH) is an important mineral contributing to processes of atmospheric and terrestrial importance. Their interactions with water vapor are particularly relevant in these contexts. In this work, molecular details of water vapor (0.0-19.0 Torr; 0-96% relative humidity at 25 °C) adsorption at surfaces of synthetic goethite nanoparticles ...
Xiaowei, Song, Jean-François, Boily
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Hetero-aggregation of goethite and ferrihydrite nanoparticles controlled by goethite nanoparticles with elongated morphology

Science of The Total Environment, 2020
The dispersities of goethite nanoparticles (GTNPs) and ferrihydrite nanoparticles (FHNPs) affect the transport and retention of nanoparticle-associated contaminants. However, the effects of interaction on nanoparticle stability under varying environmental conditions have not been previously investigated. This study utilized settling experiments, a semi-
Jie Ma, Yilun Jing, Lijun Gao, Jingping Chen, Zhiqiao Wang, Liping Weng, Haiming Li, Yali Chen, Yongtao Li   +8 more
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Absence of phenol adsorption on goethite

Environmental Science & Technology, 1984
Etablissement d'un protocole d'analyse du devenir de polluants organiques a l'etat de trace dans les systemes eau souterraine-sol.
E C, Yost, M A, Anderson
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Interaction of silicic acid with goethite

Journal of Colloid and Interface Science, 2007
The adsorption of Si on goethite (alpha-FeOOH) has been studied in batch experiments that cover the natural range of Si concentrations as found in the environment. The results have been interpreted and quantified with the charge distribution (CD) and multi-site surface complexation (MUSIC) model in combination with an extended Stern (ES) layer model ...
Hiemstra, T., Barnett, M.O., van Riemsdijk, W.H.   +2 more
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Properties of Goethites of Varying Crystallinity

Clays and Clay Minerals, 1985
Abstract Goethites were synthesized from ferrihydrite in 0.7 M KOH between 4° and 90°C. As temperatures increased, the goethite crystals became larger and of less domainic character, and surface areas decreased from 153 to 9 m 2 /g.
Schwertmann, U., Cambier, Philippe, P., Murad, E.   +2 more
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The adsorption of lead species on goethite

Colloids and Surfaces A: Physicochemical and Engineering Aspects, 2000
Adsorption of lead ionic species at the goethite aqueous interface, as well as the electrokinetic properties of the system, were measured as a function of pH. The interpretation was based on the Surface Complexation Model assuming that association of lead species with negatively charged surface sites takes place.
Kovačević, Davor, Pohlmeier, Andreas, Özbas, Galip, Narres, Hans-Dieter, Kallay, Nikola   +4 more
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Adsorption of Copper, Zinc, and Cadmium on Goethite, Aluminum‐Substituted Goethite, and a System of Kaolinite–Goethite: Surface Complexation Modeling

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, Chariklia Kallianou   +1 more
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Comparison of Selenate and Sulfate Adsorption on Goethite

Journal of Colloid and Interface Science, 2001
The 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., Hiemstra, T., van Riemsdijk, W.H.   +2 more
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Magnetism in aluminous goethite

Physics and Chemistry of Minerals, 1991
Magnetism in fine particles of goethite which contain 5, 11, 18 and 30 mole % aluminium has been investigated. Mossbauer spectroscopy was used, with the samples at 4.2 K and in applied magnetic fields of 0–8 T. Analysis was via a mean field model, in which the spectra from each sample were simultaneously least-squares fitted.
R.J. Pollard, Q.A. Pankhurst, P. Zientek
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