Journal
JOURNAL OF THE IRANIAN CHEMICAL SOCIETY
Volume 20, Issue 7, Pages 1589-1603Publisher
SPRINGER
DOI: 10.1007/s13738-023-02780-3
Keywords
Bimetallic nanoparticles; Peroxymonosulfate; Orange II dye; Sonocatalytic degradation; TiO2-FeZn nanoparticles
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TiO2-FeZn nanocatalyst combined with sonolysis was used as a highly efficient advanced oxidation process (US/TiO2-FeZn/PMS) for the decoloration of orange II dye (OII) and real textile wastewater. Under optimal experimental conditions, the decolorization and COD removal of textile wastewater were 99.9% and 74.6%, respectively, at 40 min. The TiO2-FeZn/PMS/US process exhibited a higher removal of OII (95%) compared to the TiO2 NPs/PMS/US process (54%). The recyclability study showed that the process could be reused up to three consecutive cycles.
TiO2-FeZn nanocatalyst combined with sonolysis were used to activate peroxymonosulfate (PMS) as a highly efficient advanced oxidation process (US/TiO2-FeZn/PMS) for the decoloration of orange II dye (OII) and real textile wastewater. The characterization of the as-synthesized NPs was performed by SEM, FTIR, EDX and XRD analyses. Optimal experimental conditions of operational parameters were obtained: pH = 3, 15 mg/L initial OII concentration, 0.2 g/L PMS, 0.7 g/L nanocatalyst dosing, and 300 W ultrasonic power. The decolorization was observed to increase with increasing the dose of nanocatalyst and the ultrasonic power, and with decreasing pH (under acidic conditions). Under optimal experimental conditions, decolorization and COD removal of textile wastewater were 99.9% and 74.6%, respectively, at 40 min. The TiO2-FeZn/PMS/US as a novel process exhibited a higher removal of OII (95%) than TiO2 NPs/PMS/US process (54%). The OII removal efficiency by the different processes decreased in the following order: TiO2-FeZn/US/PMS > TiO2-FeZn/PMS > TiO2-FeZn/US > TiO2 /US/PMS > US/PMS > TiO2-FeZn > PMS > US. The recyclability study revealed that the process could be reused up to three consecutive cycles. The current US/nanocatalyst/PMS system was concluded to be an efficient, reusable and stable nanocatalyst for the oxidation of textile dyes.
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