An Investigation on Polyelectrolyte Adsorption on Kaolin Correlated with Zeta Potential and Rheology Studies
This study covers the investigations based on the electrokinetic and rheological properties to explain the interactions between kaolin minerals and commercially available polyelectrolyte in anionic character. Additional adsorption test were also conducted to support the interaction mechanism.Adsorption tests showed that adsorption densities decrease by increasing the solid content. Increasing the solids contents from 1% to 30% by weight resulted in the decrease on adsorption from 2.14 mg/g to 1.85 mg/g. Because of its difficulty, the solids ratio at 70% was not studied. However,following to trend of the curve plotted adsorption density-solid ratio, an estimation was made and adsorption density at 70% solid content was extracted from the curve as 1.75～1.80 mg/g.The electrokinetic studies pointed out that the presence of polyelectrolyte increase the zeta potential of kaolin from 40 mV to 60 mV which is reasonable conditions to disperse and stabilize the kaolin slurry and lower the viscosity. When these result of the different tests are combined and considered together, 2 mg/g polyelectrolyte concentration was noted as optimal concentration where adsorption density, viscosity and zeta potential of the slurries give maxima and remain constant after this concentration.
Polyelectrolyte Adsorption Kaolin Zeta potential Rheology
M. S. Eygi G. Ate(s)ok
Mineral Processing Engineering Department, Faculty of Mining, Istanbul Technical University, Istanbul, Turkey
国际会议
XXIV International Mineral Processing Congress(第24届国际矿物加工大会)
北京
英文
2215-2220
2008-09-24（万方平台首次上网日期，不代表论文的发表时间）