Fenton-like oxidative degradation of orange g dye and binary dye mixtures using Oxone® activated with cobalt-doped alumina catalysts
Two texturally and structurally different Co-doped aluminas were obtained by using the sol-gel method followed by calcination at temperatures of 1000?C and 1100?C. The obtained materials were tested as catalysts in anionic textile dye Orange G (OG) degradation using Oxone? as a precursor of sulfate...
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Veröffentlicht in: | Hemijska industrija 2024-08, p.16-16 |
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Format: | Artikel |
Sprache: | eng |
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Zusammenfassung: | Two texturally and structurally different Co-doped aluminas were obtained by
using the sol-gel method followed by calcination at temperatures of 1000?C
and 1100?C. The obtained materials were tested as catalysts in anionic
textile dye Orange G (OG) degradation using Oxone? as a precursor of sulfate
anion radicals, the main reactive oxygen species. Effects of temperature and
initial pH on degradation efficiency was investigated. The increase in
temperature accelerated the reaction rate and the maximal degradation
efficiency was obtained at 60?C. Different kinetic models were applied and
pseudo-first order rate was found to be the most appropriate. Both catalysts
showed the optimal performance in the pH range around neutral. Coexisting
cations (Ca2+, Mg2+, K+ and Na+) enhanced the OG degradation rate, as well
as anions: Cl? and H2PO4?, while NO3?, SO42?and HCO3? inhibited the
degradation. The catalysts were also proved effective in degradation of the
other investigated dyes: Methylene blue, Basic blue 41, and Remazol
brilliant blue R. Finally, simultaneous degradation of OG in binary dye
mixtures was investigated showing that the synthesized catalysts can be also
used in simultaneous processes of dye degradation. However, differences in
structural and textural properties of the two catalysts affected their
catalytic performance. |
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ISSN: | 0367-598X 2217-7426 |
DOI: | 10.2298/HEMIND240126016M |