Journal of Siberian Federal University. Chemistry / Photochemical Destruction of Methyl Orange Azo Dye in a Combined Iron-Persulfate System

Full text (.pdf)
Issue
Journal of Siberian Federal University. Chemistry. 2023 16 (3)
Authors
Sizykh, Marina R.; Batoeva, Agniya A.; Aseev, Denis G.
Contact information
Sizykh, Marina R.: Baikal Institute of Nature Management SB RAS Ulan-Ude, Russian Federation; ; Batoeva, Agniya A.: Baikal Institute of Nature Management SB RAS Ulan-Ude, Russian Federation; Aseev, Denis G.: Baikal Institute of Nature Management SB RAS Ulan-Ude, Russian Federation
Keywords
azo dye; persulfate; Advanced Oxidation Processes; natural water matrix; solar irradiation; Fenton-like oxidative systems
Abstract

Regularities of oxidative degradation of bioresistant organic compounds were studied, using the methyl orange azo dye (MO) as the target, in oxidative systems initiated by natural solar irradiation. According to the conversion degree of MO and the efficiency of solution discoloration, the considered oxidative systems can be arranged in the following order: {Fe0/S2O82-/Solar}>{S2O82-/Solar}>{Fe0/S2O82-}>{Solar}. It has been established that only in the Solar-induced Fenton- like oxidative system {Fe0/S2O82-/Solar}, not only complete conversion of the MO occurs, but also its mineralization (43–72 %). In a real water matrix (in the natural surface water of the Selenga River), inhibition of oxidative processes is observed, which is mainly due to the influence of hydrocarbonates. The obtained results indicate the prospects of using the oxidative system {Fe0/S2O82-/Solar} in the development of innovative technologies for deep treatment of wastewater containing bioresistant organic compounds

Pages
426–437
EDN
NMWONV
Paper at repository of SibFU
https://elib.sfu-kras.ru/handle/2311/151719