<報文>硫酸バリウムならびに硫酸鉛の界面動電的研究

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  • リュウサン バリウム ナラビニ リュウサン ナマリ ノ カイメンドウデンテキ ケンキュウ
  • <Original Papers>Electrokinetic Studies on Barium Sulfate and Lead Sulfate

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The effect of various inorganic electrolytes on zeta potentials of barium sulfate or lead sulfate is investigated by means of electrokinetic technque. Ba^<2+> and Pb^<2+> which have been known as potential-determining ions for barium sulfate and lead sulfate respectively markedly increase the zeta potentials of corresponding sulfates to positive direction. SO_4^<2->, also acting as a potential-determining ion, increases the zeta potentials of barium sulfate and lead sulfate to negative direction. H^+ and OH^- function as surface active ions comparable to potential-determining ions for barium sulfate and lead sulfate respectively. SO_4^<2-> and OH^- do not influence the floatability of barium sulfate or lead sulfate in the flotation test using sodium oleate (2kg/t) as a collector despite the fact that these ions markedly increase the zeta potentials to the negative direction.

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