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Surface characteristics of magnetite in aqueous suspension
Luleå tekniska universitet.
Luleå tekniska universitet.
Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Sustainable Process Engineering.
1998 (English)In: Journal of Colloid and Interface Science, ISSN 0021-9797, E-ISSN 1095-7103, Vol. 197, no 1, p. 151-159Article in journal (Refereed) Published
Abstract [en]

Surface characteristics of magnetite at 25°C in aqueous suspensions are systematically studied. The measured specific surface area and concentration of proton binding sites correspond well to the calculated values. Zeta potential of magnetite in the absence of multivalent cations exhibits positive values in acidic solution and becomes negative with increasing pH. pHpzcis about 6. In the presence of excess cations such as Fe2+or Fe3+, specific adsorption takes place at the surface of magnetite, which dramatically influences the value of zeta potential. The concentrations of soluble Fe ions at pH about 4.5 increase with solid concentrations of magnetite indicating some surface-related reaction mechanisms.

Place, publisher, year, edition, pages
1998. Vol. 197, no 1, p. 151-159
National Category
Physical Chemistry
Research subject
Chemistry of Interfaces
Identifiers
URN: urn:nbn:se:ltu:diva-8987DOI: 10.1006/jcis.1997.5239ISI: 000071945800019Scopus ID: 2-s2.0-0031877126Local ID: 78aa0820-1db8-11dd-8384-000ea68e967bOAI: oai:DiVA.org:ltu-8987DiVA, id: diva2:981925
Note

Godkänd; 1998; 20080509 (bajo)

Available from: 2016-09-29 Created: 2016-09-29 Last updated: 2018-07-10Bibliographically approved

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Forsling, WillisSamskog, Per-Olof

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