Electrophoretic Mobility Of Oil Drops In The Presence Of Solvent Extraction Reagents

K. L. Lin, K. Osseo-Asare

研究成果: Article同行評審

16 引文 斯高帕斯(Scopus)

摘要

The electrophoretic mobility (EM) of hexane and toluene droplets dispersed in aqueous solution has been investigated as a function of pH in the presence and absence of 5,8-diethyl-7-hydroxy-6-dodecanone oxime (the active extractant in the Henkel reagent, LIX63), Dinonylnaphthalene sulfonic acid (HDNNS), di(2-ethylhexyl) phosphoric acid (HDEHP) and tricaprylyl methyl ammonium chloride (Aliquat 336). Both hexane and toluene droplets were found to be negatively charged at pH > 3, with the absolute EM increasing with pH; the toluene droplets were more negatively charged than the hexane droplets. The hydroxyoxlme reagent had no significant effect on the EM, whereas the addition of HDNNS and HDEHP dramatically enhanced the negative charge at the organic/ water interface. In the presence of 1.5 x 10-4 kmol m“3 Aliquat 336, the organic drops became less negatively charged and eventually acquired a positive charge at pH < 9. The results are explained in terms of the preferential adsorption of the aqueous phase hydroxyl ions and the polar groups of the various extract-ants at the organic/water interface.

原文English
頁(從 - 到)365-380
頁數16
期刊Solvent Extraction and Ion Exchange
2
發行號3
DOIs
出版狀態Published - 1984 六月 1

All Science Journal Classification (ASJC) codes

  • 化學 (全部)
  • 化學工程 (全部)

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