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Information × Registration Number 0224U002614, 0122U000790 , R & D reports Title Advanced oxidation processes, including nanocatalytic, based on cavitation technologies for purification of aqueous media from resistant N-substituted organic compounds popup.stage_title Head Sukhatskyi Yurii V., Кандидат технічних наук Registration Date 21-02-2024 Organization Lviv Polytechnic National University popup.description2 For the purification of aquatic environments from N-containing organic compounds (dyes, pharmaceuticals), combined processes have been developed in which ultrasonic (US) cavitation is combined with advanced oxidation processes based on periodates/persulfates/sulfites/Fenton-like systems. The synergism between the three components of the combined process – the action of cavitation, reactive treatment with oxidizing agents, and the catalyst for the decomposition of the oxidant – provides enhanced generation of highly reactive intermediate compounds with a “short lifetime” (for example, hydroxyl or sulfate radicals, singlet oxygen, etc.) and, as a result, an increase in treatment efficiency and intensity. The team of performers proposed to use spinel nanoparticles synthesized by the co-precipitation method in the ultrasound field as catalysts for the decomposition of oxidants. This makes it possible to significantly reduce the consumption of oxidants and, as a result, the cost of treatment. In addition, the possibility of purposeful regulation of the quantitative and qualitative composition of intermediate compounds by changing the degradation parameters (contaminant:oxidant molar ratio, catalyst loading, pH of the reaction medium, its temperature, specific power of ultrasonic cavitation treatment, etc.) creates prerequisites for ensuring controllability of treatment in general, and flexible management of the intensity of the development of cavitation phenomena, in particular, which enables treatment of both low- and high-concentration water environments. MnFe2O4 spinel nanoparticles with an average crystallite size of ~7 nm were used as catalysts for the oxidative degradation of the diazine dye safranin T, Fe2O3 nanoparticles with an average crystallite size of ~18 nm – as catalysts for the degradation of the antibiotic chloramphenicol, and MgMn2O4 spinel nanoparticles with an average crystal size of ~24 nm – as catalysts for the degradation of the xanthene dye rhod  Product Description popup.authors Huminilovych Ruslana R. Masiuk Andrii S. Ruda Mariia V. Sozanskyi Martyn A. Shepida Mariana V. popup.nrat_date 2024-02-21 Close