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Studies of collector adsorption on iron oxides by in-situ ATR-FTIR spectroscopy
Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Sustainable Process Engineering.
Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Sustainable Process Engineering.
Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Sustainable Process Engineering.ORCID iD: 0000-0002-4755-5754
Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Sustainable Process Engineering.ORCID iD: 0000-0001-9794-8305
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2010 (English)In: Industrial & Engineering Chemistry Research, ISSN 0888-5885, E-ISSN 1520-5045, Vol. 49, no 4, p. 1493-1502Article in journal (Refereed) Published
Abstract [en]

In this work, the adsorption of three model collectors, viz., poly(ethylene glycol) monooleate (PEGMO), ethyl oleate, and maleic acid, as well as the commercial fatty-acid-type collector Atrac 1563, was studied in situ on synthetic hematite using attenuated total reflectance Fourier transform infrared (ATR-FTIR) spectroscopy. The adsorption behavior of the studied compounds on hematite was determined to a large extent by the polar headgroup. Adsorption of Atrac and PEGMO as a function of concentration showed good agreement with the Freundlich adsorption model, suggesting energetically heterogeneous adsorption. In situ desorption experiments revealed that a large fraction of the Atrac was weakly attached to the hematite surface, as it was partially removed by flushing with water at pH 8.5 and 10. These results suggest that a separate washing unit after the flotation step could be beneficial in reducing the contamination of iron ore by flotation chemicals.

Place, publisher, year, edition, pages
2010. Vol. 49, no 4, p. 1493-1502
National Category
Chemical Process Engineering Physical Chemistry
Research subject
Chemical Technology; Physical Chemistry
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URN: urn:nbn:se:ltu:diva-5097DOI: 10.1021/ie901343fISI: 000274342500006Scopus ID: 2-s2.0-77649104829Local ID: 31e76e00-f93f-11de-bae5-000ea68e967bOAI: oai:DiVA.org:ltu-5097DiVA, id: diva2:977971
Note
Validerad; 2010; 20100104 (linste)Available from: 2016-09-29 Created: 2016-09-29 Last updated: 2018-07-10Bibliographically approved

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Potapova, ElisavetaCarabante, IvanGrahn, MattiasHolmgren, AllanHedlund, Jonas

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