This study employs graphene oxide/magnesium oxide nanocomposites (GO/MgO NCs) in catalytic phenol ozonation during laboratory-scale batch reactor experiments. We show the impact of GO/MgO NCs dosage (0.1-1 g/L) and ozone concentration (20-125 g O3/hour) at time intervals between 0 to 60 minutes on the degradation of 500 mg/L phenol synthesized wastewater. The study further explores the formation of reactive oxygen species, such as hydroxyl radical (OH) and singlet oxygen (1O2), during ozonation in the presence of GO/MgO, tert-butanol, and sodium azide. Quenching experiments show the enhanced effect caused mainly by singlet oxygen radicals (1O2) with minor contribution from hydroxyl radicals (OH). Here we show the degradation of phenol via catalytic ozonation is pseudo-first order with a constant of 0.056/min. The results indicate catalytic ozonation with the prepared catalyst significantly enhances the performance of phenol removal.

Catalytic ozonation of phenol via GO/MgO nanocomposites

255th National Meeting (2018)

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