@conference{
author = "Marković, Marija and Mudrinić, Tihana and Jović-Jovičić, Nataša and Ajduković, Marija and Perić Grujić, Aleksandra and Milutinović Nikolić, Aleksandra and Marinović, Sanja",
year = "2019",
abstract = "Standard clay rich in montmorillonite was modified by means of Na-exchange process and used
in pillaring process with Al(NO3)3 in the presence of NaOH. Obtained pillared clay was impregnated with
Co2+ using incipient wetness impregnation method, calcined (CoAP) and applied as a catalyst in catalytic
oxidation of tartrazine in the presence of Oxone® (peroxymonosulfate). The catalyst was characterized by
chemical, XRD and textural analysis. The morphology was monitored by SEM coupled with EDS. The
influence of pH of the initial dye solution on decolorization process was investigated in the pH range from
2 to 11 at 50 °C. Decolorization was monitored at wavelength λ=426 nm, using UV-Vis spectroscopy. Above
tartrazine pKa (9.4) this peak was shifted to 399 nm. Besides decolorization of tartrazine solution also the
formation, followed by degradation of tartrazine oxidation products, was studied. At pH>10 under the same
reaction conditions, the process was almost negligible. On the other hand at 6<pH<8 the reaction was the
fastest, while somewhat slower for 2<pH<4. CoAP was found to be efficient catalyst in Oxone® induced
catalytic degradation of both tartrazine and products of its degradation in the pH range below tartrazine
pKa.",
publisher = "Serbian Ceramic Society",
journal = "Program and the Book of abstracts - Serbian Ceramic Society Conference, Advanced Ceramics and Application VIII: New Frontiers in Multifunctional Material Science and Processing, Serbia, 23-25. September 2019, Belgrade",
title = "The effect of the initial pH on decolorization and degradation of tartrazine in the reaction with Oxone®, using Co(II) impregnated aluminum-pillared montmorillonite as a catalyst",
pages = "64-64",
url = "https://hdl.handle.net/21.15107/rcub_cer_6271"
}