Abstract
The kinetic regularities of photochemical oxidation of stable complex cyanides (hexacyanoferrates) with persulfate (oxidizing system {UV/S2O\(_{8}^{{2 - }}\)}) and hydrogen peroxide (oxidizing system {UV/H2O2}) under the influence of quasi-monochromatic UVC radiation from a KrCl excilamp (222 nm) have been studied. According to the efficiency and rate of the destruction of the target compound, the oxidizing systems under study can be arranged in the following series: {UV/S2O\(_{8}^{{2 - }}\)} > {UV/H2O2} > {UV}. The effective destruction of hexacyanoferrates at micromolar concentrations (≤47 μM) to nontoxic and biodegradable compounds in the combined {UV/S2O\(_{8}^{{2 - }}\)} system is due to the high oxidizing ability of reactive oxygen species formed as a result of persulfate photolysis.
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This study was performed under the Basic Research Program (no. FWSU-2021-0006) of the Baikal Institute of Nature Management (BINM), Siberian Branch, Russian Academy of Sciences using the equipment of the Multiaccess Center of BINM (CCU BINM SB RAS (Ulan-Ude, Russia)).
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Batoeva, A.A., Tsybikova, B.A. & Sizykh, M.R. Photoinduced Destruction of Complex Cyanides Using Quasi-Monochromatic UVC Radiation of a KrCl Excilamp (222 nm). Russ. J. Phys. Chem. 97, 2855–2860 (2023). https://doi.org/10.1134/S003602442312004X
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DOI: https://doi.org/10.1134/S003602442312004X