ASSESSMENT OF THE POSSIBILITY OF USING PEROXODISULURIC ACID IN THE TREATMENT PROCESSES OF WASTEWATER CONTAINING SYNTHETIC DYES

Many works have been devoted to the issues of wastewater treatment from organic ecotoxicants, while the search for alternative reagents and technologies for their destruction due to the limitations and disadvantages of classical methods remains relevant. Due to the active growth of production and consumption rates and the strong negative impact on the environment, pollution of natural water sources with wastewater containing synthetic dyes is an extremely serious environmental problem. As an alternative to traditional methods of ozonation and chlorination, the article considers the possibility of using peroxodisulfuric acid (H2S2O8) as a promising oxidant of synthetic dyes in wastewater using the example of model pollutants: fuchsin, methylene blue, bromocresol green, methyl red and rhodamine C. It was found that in pure form peroxodisulfuric acid oxidizes no more than 40% by weight of the dye, but the introduction of iron (II) compounds as catalyst into the system increases the degree of destruction by up to 90%. The optimal doses of the oxidant and the catalyst were determined, and the rates of destruction were calculated. It is noted that an increase in the dose of the oxidant and catalyst above the optimal one reduces the efficiency of destruction. The combined use of iron compounds and peroxodisulfuric acid makes it possible to accelerate the destruction of methyl red by 5 times, methylene blue by 10 times, rhodamine C by 18 times, bromocresol green by 58 times and fuchsin by 3 times compared with individual H2S2O8. The data obtained indicate the high prospects of using the H2S2O8-Fe(II) system in the processes of oxidation of organic dyes in wastewater. For citation: Liubushkin T.G., Kuzin E.N., Ivantsova N.A., Konkova T.V. Assessment of the possibility of using peroxodisuluric acid in the treatment processes of wastewater containing synthetic dyes. ChemChemTech [Izv. Vyssh. Uchebn. Zaved. Khim. Khim. Tekhnol.]. 2025. V. 68. N 1. P. 120-126. DOI: 10.6060/ivkkt.20256801.7124.