The adsorption of polysaccharides onto mineral surfaces: an acid/base interaction

Natural polysaccharides such as starch, dextrin, guar gum, cellulose and their derivatives are promising non-toxic organic depressants. Although generally perceived as non-selective, these polymers have found use in commercial processes or have been tested in laboratories in practically all flotatio...

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Bibliographic Details
Published inInternational journal of mineral processing Vol. 60; no. 3; pp. 229 - 245
Main Authors Liu, Qi, Zhang, Yahui, Laskowski, J.S.
Format Journal Article
LanguageEnglish
Published Amsterdam Elsevier B.V 01.12.2000
Elsevier
Subjects
Applied sciences
Chemisorption
Exact sciences and technology
Flotation reagents
Metallurgical fundamentals
Metals. Metallurgy
Physisorption
Production of metals
Surface adsorption
Surface adsorption
Chemisorption
Physisorption
Flotation reagents
Flotation reagent
Flotation
Ore
Adsorption
Ore treatment
Experimental study
Polysaccharide
Ore concentration
Hydrometallurgy
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Summary:Natural polysaccharides such as starch, dextrin, guar gum, cellulose and their derivatives are promising non-toxic organic depressants. Although generally perceived as non-selective, these polymers have found use in commercial processes or have been tested in laboratories in practically all flotation systems involving every type of minerals. In this communication, the adsorption mechanisms of natural polysaccharides are reviewed, with the objective of promoting the wider applications of the polymers. While it seems generally accepted that natural polysaccharides interact with minerals via surface metal-hydroxylated species, an acid/base interaction model between the natural polysaccharides and mineral surfaces is proposed to explain many observed adsorption and flotation phenomena.
ISSN:0301-7516
1879-3525
DOI:10.1016/S0301-7516(00)00018-1