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Simultaneous DTA-TG Study of Montmorillonite Mechanochemically Treated with Crystal-violet

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Abstract

The mechanochemical solid-state adsorption of the cationic dye crystal violet (CV) by montmorillonite was investigated by XRD and simultaneous DTA-TG. Solid CV was ground with the clay for 5 min and four different varieties of CV mechanochemically treated clay were investigated. X-ray and DTA data were compared with those of CV-montmorillonite obtained from an aqueous suspension. X-ray and DTA studies of a ground mixture and a ground mixture heated at 110°C suggest that the mechanochemical adsorption of organic cations takes place on the external surfaces of the clay. The study of a ground mixture washed with water, and washed with water and acetone reveal that water is essential for the penetration of CV into the interlayer space.

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Authors and Affiliations

  1. Department of Inorganic and Analytical Chemistry, The Hebrew University of Jerusalem, Jerusalem, 91904, Israel

    I. Lapides & S. Yariv

  2. Wolfson Applied Material Research Center, School of Chemistry, Sackler Faculy of Exact Sciences, Tel Aviv University, Tel Aviv, 69978, Israel

    D. Golodnitsky

Authors
  1. I. Lapides
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  2. S. Yariv
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  3. D. Golodnitsky
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Lapides, I., Yariv, S. & Golodnitsky, D. Simultaneous DTA-TG Study of Montmorillonite Mechanochemically Treated with Crystal-violet. Journal of Thermal Analysis and Calorimetry 67, 99–112 (2002). https://doi.org/10.1023/A:1013737914178

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  • DOI: https://doi.org/10.1023/A:1013737914178

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