Destruction of synthetic dyes by photocatalytic activated peroxodisulfuric acid

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Abstract

The use of ultraviolet irradiation in the practice of AOPs (Advanced Oxidation Processes) for the treatment of wastewater of various origins has been the subject of many studies. In recent years, the possibilities of using AOPs based on sulfate radicals, the main source of which is peroxodisulfuric acid, have been actively considered. In this paper, the effect of peroxydisulfuric acid additives on the process of photodegradation of fuchsin, bromocresol green and methyl red was studied. It was proven that the combination of UV radiation and H2S2O8 has a synergistic effect and makes it possible to significantly increase the efficiency and rate of oxidation of dyes in comparison with individual photo- and reagent treatment. The maximum oxidation efficiency was 99.9% for bromocresol green, 93% for fuchsin and 76% for methyl red.

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About the authors

T. G. Liubushkin

Mendeleev University of Chemical Technology of Russia

Author for correspondence.
Email: timlub2000@gmail.com
Russian Federation, Moscow

E. N. Kuzin

Mendeleev University of Chemical Technology of Russia

Email: timlub2000@gmail.com
Russian Federation, Moscow

N. A. Ivantsova

Mendeleev University of Chemical Technology of Russia

Email: timlub2000@gmail.com
Russian Federation, Moscow

V. N. Dubrovina

Mendeleev University of Chemical Technology of Russia

Email: timlub2000@gmail.com
Russian Federation, Moscow

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Supplementary files

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2. Fig. 1. Optical density of model solutions: bromocresol green – 1; fuchsin – 2; methylene red – 3; normalized spectrum of PCL emission – 4.

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3. Fig. 2. Efficiency of oxidation of synthetic dyes with peroxydisulfuric acid (1 – methyl red, 2 – fuchsine, 3 – bromocresol green).

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4. Fig. 3. Kinetic curves of photooxidation of dyes (1 – methyl red, 2 – fuchsin, 3 – bromocresol green).

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5. Fig. 4. Kinetic curves of photooxidation of dyes in the presence of peroxydisulfuric acid (1 – methyl red, 2 – fuchsin, 3 – bromocresol green).

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