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Interactions between C.I. Basic Blue 41 and aluminosilicate sorbents.

Maria Roulia1, Alexandros A Vassiliadis

  • 1Inorganic Chemistry Laboratory, Department of Chemistry, University of Athens, Panepistimiopolis, 15771 Athens, Greece. roulia@chem.uoa.gr

Journal of Colloid and Interface Science
|July 2, 2005
PubMed
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Aluminosilicate sorbents effectively retain the cationic dye C.I. Basic Blue 41 through H-aggregate formation. Montmorillonite and bentonite show complex interactions, including dye migration into clay interlayers.

Area of Science:

  • Materials Science
  • Environmental Chemistry
  • Adsorption Science

Background:

  • Cationic dyes like C.I. Basic Blue 41 pose environmental challenges due to their persistence in water bodies.
  • Aluminosilicate materials, including clays and perlite, are widely explored for their sorbent properties.
  • Understanding dye-sorbent interactions is crucial for developing effective water remediation strategies.

Purpose of the Study:

  • To investigate the adsorption mechanism of C.I. Basic Blue 41 onto four aluminosilicate sorbents.
  • To explore the influence of temperature and sorbent:dye ratio on dye retention.
  • To elucidate the role of H-aggregate formation and interlayer migration in the adsorption process.

Main Methods:

  • Adsorption experiments using montmorillonite, bentonite, raw perlite, and expanded perlite.

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  • Spectroscopic analysis, including time-dependent absorbance spectra and diffuse reflectance spectroscopy.
  • Investigation of varying temperatures and clay:dye ratios to determine optimal adsorption conditions.

    • Main Results:

    • All four sorbents demonstrated retention of C.I. Basic Blue 41, primarily through H-aggregate formation.
    • Montmorillonite and bentonite exhibited interlayer dye migration, with bentonite showing faster intercalation.
    • Increased dye loadings led to layered stacking and higher dye aggregates on montmorillonite and bentonite.

    Conclusions:

    • Aluminosilicate sorbents are effective for removing C.I. Basic Blue 41 from aqueous solutions.
    • The adsorption mechanism involves H-aggregate formation and, for clays, interlayer dye migration and aggregation.
    • These findings contribute to the understanding of dye-sorbent interactions for potential wastewater treatment applications.