The influence of metal cations on the behaviour of carboxymethyl celluloses as talc depressants

Parolis, Lesley A.S.; Merwe, René van der; Groenmeyer, Gary V.; Harris, Peter

doi:10.1016/j.colsurfa.2007.10.001

Cited by 65 publications

(27 citation statements)

References 16 publications

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“…As a consequence, the increase of the polymer adsorption amount is observed. The other effect of the presence of electrolyte is screening of repulsion forces between the identically charged polymer segments which causes that the polymer macromolecules form coil conformation (Parolis et al 2008). The adsorption of the coils at the surface of the solid also provokes the increase of CMC adsorption amount.…”

Section: Resultsmentioning

confidence: 99%

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Competitive adsorption in the system: carboxymethylcellulose/surfactant/electrolyte/Al2O3

Grządka

2011

Cellulose

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The adsorption of carboxymethylcellulose (CMC) in the presence or absence of the surfactants: anionic SDS, nonionic Triton X-100 and their mixture SDS/TX-100 from the electrolyte solutions (NaCl, CaCl 2 ) on the alumina surface (Al 2 O 3 ) was studied. In each measured system the increase of CMC adsorption in the presence of surfactants was observed. This increase was the smallest in the presence of SDS, a bit larger in the presence of Triton X-100 and the largest when the mixture of SDS/Triton X-100 was used. These results are a consequence of formation of complexes between the CMC and the surfactant particles. Moreover, the dependence between the amount of surfactants' adsorption and the CMC initial concentration was measured. It comes out that the surfactants' adsorption amount is not dependent on the CMC initial concentration and moreover, it is unchanged in the whole measured concentration range. The influence of kind of electrolyte, its ionic strength as well as pH of a solution on the amount of the CMC adsorption at alumina surface was also measured. The amount of CMC adsorption is larger in the presence of NaCl than in the presence of CaCl 2 as the background electrolyte. It is a result of the complexation reaction between Ca 2? ions and the functional groups of CMC belonging to the same macromolecule. As far as the electrolyte ionic strength is concerned the increase of CMC adsorption amount accompanying the increase of electrolyte ionic strength is observed. The reason for that is the ability of electrolyte cations to screen every electrostatic repulsion in the adsorption system. Another observation is that the increase of pH caused the decrease of CMC adsorption. The explanation of this phenomenon is connected with the influence of pH on both dissociation degree of polyelectrolyte and kind and concentration of surface active groups of the adsorbent.

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Section: Resultsmentioning

confidence: 99%

“…The obtained results suggest that the main driving forces for CMC adsorption on talc are a combination of electrostatic interactions and hydrogen bonding rather than hydrophobic force. Parolis (Parolis et al 2008) studied the effect of metal cations (Ca 2? ; Mg 2?…”

Section: Introductionmentioning

confidence: 99%

Competitive adsorption in the system: carboxymethylcellulose/surfactant/electrolyte/Al2O3

Grządka

2011

Cellulose

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“…Carboxymethyl cellulose, commonly abbreviated as CMC, is one particular polymer that has been employed to alter particle/particle or particle/bubble interactions when used as flocculant [10], dispersant [11] or depressant (a polymer that reduces the recovery of a hydrophobic mineral in flotation) [12]. Many examples of the application of CMC as a depressant for talc exist in the literature [13][14][15][16][17].…”

Section: Introductionmentioning

confidence: 99%

Evolution of carboxymethyl cellulose layer morphology on hydrophobic mineral surfaces: Variation of polymer concentration and ionic strength

Beaussart

Mierczyńska-Vasilev

Beattie

2010

Journal of Colloid and Interface Science

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“…Therefore, the depression of talc has attracted attention for decades, especially for the separation of hydrophobic minerals, such as molybdenite and copper sulfide [2,3]. CMC [4,5], guar gum [4,6,7], dextrin [8,9], lignosulfonates [10], galactomannan [11] acrylamide-covinylpyrrolidinone [12] and ZnSO 4 with Na 2 CO 3 or other water soluble salt of a weak acid [13,14] have been reported to be effective inhibitors. Polymers are widely used as inhibitors for talc.…”

Section: Introductionmentioning

confidence: 99%

Depression mechanism of the zinc sulfate and sodium carbonate combined inhibitor on talc

Wang

Liu

et al. 2016

Colloids and Surfaces A: Physicochemical and Engineering Aspect

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The influence of metal cations on the behaviour of carboxymethyl celluloses as talc depressants

Cited by 65 publications

References 16 publications

Competitive adsorption in the system: carboxymethylcellulose/surfactant/electrolyte/Al2O3

Competitive adsorption in the system: carboxymethylcellulose/surfactant/electrolyte/Al2O3

Evolution of carboxymethyl cellulose layer morphology on hydrophobic mineral surfaces: Variation of polymer concentration and ionic strength

Depression mechanism of the zinc sulfate and sodium carbonate combined inhibitor on talc

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