Results 191 to 200 of about 8,245 (240)

Multisite Adsorption of Cadmium on Goethite

Journal of Colloid and Interface Science, 1996
Recently a new general ion adsorption model has been developed for ion binding to mineral surfaces (Hiemstra and van Riemsdijk, 1996). The model uses the Pauling concept of charge distribution (CD) and is an extension of the multi-site complexation (MUSIC) approach. In the CD-MUSIC model the charge of an adsorbing ion that forms an inner sphere complex
Venema, P., Hiemstra, T., van Riemsdijk, W.H.   +2 more
openaire   +3 more sources

Interaction of Cadmium with Phosphate on Goethite

Journal of Colloid and Interface Science, 1997
Interactions between different ions are of importance in understanding chemical processes in natural systems. In this study simultaneous adsorption of phosphate and cadmium on goethite is studied in detail. The charge distribution (CD)-multisite complexation (MUSIC) model has been successful in describing extended data sets of cadmium adsorption and ...
Venema, P., Hiemstra, T., van Riemsdijk, W.H.   +2 more
openaire   +3 more sources

Nickel retention by goethite and hematite

Minerals Engineering, 2000
Abstract The association of nickel with goethite and hematite is of importance for various processes concerned with nickel extraction. The adsorption of Ni 2+ (aq) by goethite and hematite in aqueous solutions were investigated over the pH range of 3 to 9. Similar tendencies were exhibited by both minerals.
Beukes, J.P., Giesekke, E.W., Elliott, W.   +2 more
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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
openaire   +2 more sources

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
openaire   +2 more sources

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
openaire   +2 more sources

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
openaire   +2 more sources

Goethite-mediated transformation of bisphenol A

Chemosphere, 2012
Bisphenol A (BPA) is an environmental endocrine disruptor widely present in the soil and sedimentary environment. In this study, we investigated the oxidative transformation of BPA by commercial and laboratory synthetic goethite. Both goethite samples effectively induced the transformation of BPA.
Kunde, Lin, Jiafeng, Ding, Hongyu, Wang, Xinwen, Huang, Jay, Gan   +4 more
openaire   +2 more sources

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
openaire   +2 more sources

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
openaire   +2 more sources