The presence of micropollutants (MPs) in water and wastewater has been a concern for ecological and human health. This is also an emerging issue in water reclamation. The aim of this study is to investigate the removal of ozone-recalcitrant MPs including ketoprofen, ibuprofen and atrazine by catalytic ozonation with graphene oxides (GOs). The rate constants of GOs in terms of direct ozone reaction (kD), initiation (kI), promotion (kP) and inhibition (kS) in the hydroxyl radical chain reactions were quantified at different pH and degree of oxidation. The variations of rate constants with pH and oxidation degree could be ascribed to the abundances of oxygen-containing functional groups including hydroxyl, carbonyl and carboxyl groups on the GOs surfaces. The removal of ketoprofen, ibuprofen and atrazine was enhanced by catalytic ozonation with GOs due to improved hydroxyl radical formation. The removal of these three compounds can be well predicted by incorporating the rate constants of GOs into the degradation kinetic model.

Degradation of ketoprofen, ibuprofen, and atrazine by catalytic ozonation with graphene oxides (GOs): Determination of GOs kinetic behaviors and simulations of pollutant removal

2019 Fall National Meeting

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