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Nuclear magnetic resonance spectroscopy studies of mineral surfaces: application in the froth flotation
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.
2005 (English)In: Centenary of Flotation Symposium Proceedings, The Australian Institute of Mining and Metallurgy , 2005, 497-505 p.Conference paper (Refereed)
Abstract [en]

Polycrystalline and surface complexes (at synthetic sphalerite, ZnS, and galena, PbS) of zinc(II) and lead(II) ions with eight different O,O'-dialkyldithiophosphate (Dtph) substances have been prepared and comparatively studied by means of 31P CP/MAS NMR spectroscopy. The 31P resonances have been assigned to dithiophosphate groups with terminal S,S'-chelating or bridging coordinations in the mono-, bi-. tetra- and polynuclear complexes respectively. The bridging coordination of two neighbouring zinc(II) ions by O,O '-dialkyldithio-phosphate ligands was established at the surface of synthetic sphalerite. The adsorption mechanism of dialkyldithiophosphate on synthetic galena includes formation of a surface complex as well as surface precipitation. Principally different coordination modes of the reagent were discovered at the surfaces of galena and sphalerite (ie terminal S,S'-chelating coordination to the lead atom). Derivatives of monothiophosphoric and phosphoric acids were displayed as hydrolysis products of dialkyldithiophosphates at synthetic PbS

Place, publisher, year, edition, pages
The Australian Institute of Mining and Metallurgy , 2005. 497-505 p.
Research subject
Chemistry of Interfaces
Identifiers
URN: urn:nbn:se:ltu:diva-37029Local ID: ae692600-e1ad-11db-b0f8-000ea68e967bISBN: 9781920806 316 (PDF)OAI: oai:DiVA.org:ltu-37029DiVA: diva2:1010527
Conference
Centenary of Flotation Symposium : 06/06/2005 - 09/06/2005
Note
Godkänd; 2005; 20070403 (bajo)Available from: 2016-10-03 Created: 2016-10-03Bibliographically approved

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Larsson, Anna-CarinAntzutkin, OlegIvanov, Alexander V.Forsling, Willis
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