Relation among Adsorption of Collector Ion, Change of Electrokinetic Potential and Floatability of Mineral Particles

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  • 鉱物粒子への界面活性剤の吸着と界面動電位の変化について
  • コウブツ リュウシ エ ノ カイメン カッセイザイ ノ キュウチャク ト カイメンドウ デンイ ノ ヘンカ ニ ツイテ

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Abstract

Electro-osmotic velocity, adsorption density, and floatability were measured on quartz, fluorite and scheelite in the collector solution, and the relation among the adsorption density of collector ion, the change of zeta-potential and the floatability of mineral particles were discussed.<BR>The results are as follows:<BR>(1) The zeta-potential at each mineral-collector solution interface varies remarkably at each proper solution concentration range. On the other hand, the floatability of each mineral also increases notably at the solution concentration of the approximately same range. Accordingly, the floatability is correlative with the difference of zeta-potential in each system.<BR>(2) The adsorption of each collector ion on each mineral increases with the solution concentration and it shows Freundlich's isotherm. It is, further more, found that the difference of zetapotential increases with the adsorption density at the proper low solution concentration range in each system.<BR>(3) On the relation between the adsorption and the zeta-potential, the equation as follows was derived from Stern's theory, n*=(√Dn/2πkT-D/4πδei) ψ1+D/4πδeiψ0<BR>From above results, it may be said that the difference of zeta-potential is correlative with the adsorption density closely at the proper low solution concentration range and therefore the floatability of mineral particles correlates with the difference of zeta-potential.

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