Adsorption of guar gum and CMC on pyrite

Bıçak, Özlem; Ekmekçi, Zafir; Bradshaw, Dee; Harris, Peter

doi:10.1016/j.mineng.2007.03.002

Cited by 123 publications

(61 citation statements)

References 14 publications

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“…It has been shown that the adsorption difference of Dextrin-WY on sulfide minerals and on the talc surface resulted in different densities of hydroxyl groups that were exposed to solution [4]. Additionally, the research showed that the molecular weight was a significant factor that affected the performance of polymers, and the larger molecular weight polymers were more selective towards hydrophilic gangue minerals at starvation dosage [10][11][12][13]. In industry, guar gum is the most widely used depressant for hydrophobic gangue minerals.…”

Section: Introductionmentioning

confidence: 99%

Flotation and Adsorption of a New Polysaccharide Depressant on Pyrite and Talc in the Presence of a Pre-Adsorbed Xanthate Collector

Deng

Tian

et al. 2017

Minerals

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Abstract:The flotation and adsorption of a new polysaccharide konjac gum (KG) on pyrite and talc in the presence of pre-adsorbed potassium butyl xanthate (PBX) is investigated. The micro-flotation results show that KG is a quality depressant for talc and that conditioning the minerals initially with PBX before KG will increase the recovery difference between pyrite and talc. The results of artificially mixing the minerals show that compared with adding KG before PBX, when minerals are pre-adsorbed with PBX, the grade and the recovery of sulfur (S) increases by 1.96% and 5.44%, respectively. The contact angle results show that the addition of PBX before KG will increase the contact angles of pyrite, but the addition order of KG/PBX has little influence on the contact angles of talc. The adsorption tests show that KG can adsorb on pyrite and talc surfaces, while PBX can only adsorb on the pyrite surface. The addition order of KG/PBX affects the adsorption of KG and PBX on the pyrite surface but not on the talc surface. Fourier transform infrared (FTIR) spectra analysis further demonstrates the chemical adsorption of KG on pyrite and talc surfaces, while PBX chemisorbs on the pyrite surface. Based on these analyses, a schematic illustration of the reagent adsorption forms on pyrite and talc surfaces is drawn to explain the competitive adsorption of KG and PBX on mineral surfaces.

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Section: Introductionmentioning

confidence: 99%

Flotation and Adsorption of a New Polysaccharide Depressant on Pyrite and Talc in the Presence of a Pre-Adsorbed Xanthate Collector

Deng

Tian

et al. 2017

Minerals

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“…Due to the fact that the adsorption of guar gum is not affected by ionic strength, the authors also concluded that hydrogen bonding is responsible for guar gum adsorption onto talc. Very interesting conclusion was drawn by Bicak et al (2007). They found out that at low pH values the dominant mechanism of guar gum adsorption on pyrite is hydrogen bonding, but with the alkaline pH values the mechanism that can be postulated is acidbase reaction with the effect of iron oxy/hydroxyl ions present at pH 9 and 11.…”

Section: Introductionmentioning

confidence: 97%

“…Research on the adsorption of GG on the mineral surface usually concerning the influence of pH, ionic strength and GG molecular weight is the most frequent (Steenberg and Harris 1984;Jenkins and Ralston 1998;Rath and Surbamanian 1997;Jucker et al 1997;Wang et al 2005;Bicak et al 2007). However, the influence of surfactants on the adsorption and the elektrokinetic properties of the system polysaccharide-metal oxide system is neglected.…”

Section: Introductionmentioning

confidence: 99%

Influence of surfactants on the adsorption and elektrokinetic properties of the system: guar gum/manganese dioxide

Grządka

2013

Cellulose

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The adsorption of non-ionic polysaccharide-guar gum (GG) in the presence or absence of the surfactants: anionic SDS, cationic CTAB, nonionic TX-100 and their equimolar mixtures SDS/ TX-100, CTAB/TX-100 from the electrolyte solutions (NaCl, CaCl 2 ) on the manganese dioxide surface (MnO 2 ) was studied. The increase of GG adsorption amount in the presence of surfactants was observed in every measured system. This increase results from formation of complexes between the GG and the surfactant molecules. This observation was confirmed by the determination of the influence of GG on surfactants adsorption on the MnO 2 surface. The increase of GG adsorption on MnO 2 was the largest in the presence of the surfactant mixtures (CTAB/TX-100; SDS/TX-100) which is the evidence of the synergetic effect. The smallest amounts of adsorption were obtained in the presence of TX-100, which results from non-ionic character of this surface active agent. In the case of single surfactant solution CTAB has the best efficiency in increasing the amount of GG adsorption on MnO 2 which results from strong interactions with GG and also with the negatively charged surface of the adsorbent. In order to determine the electrokinetic properties of the system, the surface charge density of MnO 2 and the zeta potential measurements were performed in the presence of the GG macromolecules and the above mentioned surfactants and their mixtures. The obtained data showed that the adsorption of GG or GG/surfactants complexes on the manganese dioxide surface strongly influences the diffused part of the electrical double layer (EDL)-MnO 2 /electrolyte solution, but has no influence on the compact part of the electric double layer. This is the evidence that the polymers chains are directly bonded with the surface of the solid and the surfactants molecules are present in the upper part of the EDL.

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“…In this regard, the use of inorganic depressants such as cyanides, sulphites, or ferrocyanides has raised concerns on environmental grounds. Therefore, organic polymers have been studied, in view of their natural, biodegradability and non-toxicicity (Lopez-Valdivieso et al, 2004;Bicak et al, 2007;Liu et al, 2009;Bulut et al, 2011;Koleini, Abdollahy, and Soltani, 2012;Sarquís et al, 2014;Mu, Peng, and Lauten, 2015). However, there is currently a lack of knowledge about the interaction between these additives and solid surfaces in highly saline environments.…”

mentioning

confidence: 99%

“…Therefore, finding new pyrite depressants would confer an advantage. A recommendable option is the use of organic reagents (López-Valdivieso et al, 2004;Bicak et al, 2007;Sarquís et al, 2014). …”

mentioning

confidence: 99%

An improved flotation test method and pyrite depression by an organic reagent during flotation in seawater

Jeldres

Calisaya

Cisternas

2017

J. South. Afr. Inst. Min. Metall.

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Adsorption of guar gum and CMC on pyrite

Cited by 123 publications

References 14 publications

Flotation and Adsorption of a New Polysaccharide Depressant on Pyrite and Talc in the Presence of a Pre-Adsorbed Xanthate Collector

Flotation and Adsorption of a New Polysaccharide Depressant on Pyrite and Talc in the Presence of a Pre-Adsorbed Xanthate Collector

Influence of surfactants on the adsorption and elektrokinetic properties of the system: guar gum/manganese dioxide

An improved flotation test method and pyrite depression by an organic reagent during flotation in seawater

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