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Correlation between eletrokinetic mobility and ionic dyes adsorption of Moroccan stevensite

机译:摩洛哥弹性体的电动迁移率与离子染料吸附的相关性

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摘要

This study aims at establishing a correlation between the electrical charge of Moroccan stevensite particles and ionic dyes adsorption. The electrophoretic mobility, (U_e), of the stevensite particles in water, was measured at pH 2.5-12 by microelectrophoresis. At pH between 2.5 and 8, U_e remained constant (U_e= -1.610~(-8) m~2/(V s)), as resulting from the permanent charge of the clay mineral planar surfaces. At pH>8, the magnitude of electrophoretic mobility increased (U_e = - 2.710~(-8) m~2/(V s)) due to the deprotonation of silanol groups on the surfaces. The anionic Orange G adsorption at the clay mineral-water interface was negligible whereas the methylene blue cations were strongly adsorbed due to the electrostatic attraction.
机译:这项研究的目的是建立摩洛哥stevensite粒子的电荷与离子染料吸附之间的相关性。通过微电泳在pH 2.5-12下测量水中菱镁矿颗粒的电泳迁移率(U_e)。在pH值介于2.5和8之间时,U_e保持恒定(U_e = -1.610〜(-8)m〜2 /(V s)),这是由于粘土矿物平面表面的永久电荷而引起的。在pH值> 8时,由于表面硅烷醇基团的去质子化作用,电泳迁移率增大(U_e =-2.710〜(-8)m〜2 /(V s))。在粘土矿物质-水界面的阴离子橙G吸附可忽略不计,而由于静电吸引,亚甲基蓝阳离子被强烈吸附。

著录项

  • 来源
    《Applied clay science》 |2010年第3期|p.527-530|共4页
  • 作者单位

    Laboratoire de Matiere Condensee et Nanostructures (LMCN), Faculte des Sciences et Techniques Gueliz, BP 549, Marrakech, Morocco CIRIMAT CNRS-UPS-INP, ENSIACET, 118 Route de Narbonne, 31077 Toulouse, France Institut de Sciences des Materiaux de Mulhouse IS2M LRC 7228 - CNRS 15 rue jean Starcky BP 2488, 68057 Mulhouse Cedex, France;

    Laboratoire de Matiere Condensee et Nanostructures (LMCN), Faculte des Sciences et Techniques Gueliz, BP 549, Marrakech, Morocco;

    Laboratoire de Matiere Condensee et Nanostructures (LMCN), Faculte des Sciences et Techniques Gueliz, BP 549, Marrakech, Morocco;

    Institut de Sciences des Materiaux de Mulhouse IS2M LRC 7228 - CNRS 15 rue jean Starcky BP 2488, 68057 Mulhouse Cedex, France;

    CIRIMAT CNRS-UPS-INP, ENSIACET, 118 Route de Narbonne, 31077 Toulouse, France;

    Laboratoire de Ceosciences et Geoenvironnement, Faculte des Sciences et Techniques, Gueliz, BP 549, Marrakech, Morocco;

    CIRIMAT CNRS-UPS-INP, ENSIACET, 118 Route de Narbonne, 31077 Toulouse, France;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    stevensite; dyes; electrophoretic mobility; adsorption;

    机译:stevensite;染料;电泳迁移率吸附;
  • 入库时间 2022-08-17 13:55:24

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