H2O2/periodate (IO4-): a novel advanced oxidation technology for the degradation of refractory organic pollutants

Abstract

This study demonstrated, for the first time, that the H2O2/IO4- system could be an efficient advanced oxidation process (AOP) for wastewater treatment. Batch experiments conducted under ambient conditions with toluidine blue (TB), as a model pollutant, showed that 98% of TB and 73% of the initial total organic carbon were removed after only 1 min of treatment when using a H2O2:IO4- molar ratio of 10. Radical scavengers such as ascorbic acid, tert-butanol, 2-propanol, sodium azide and phenol were used to study the reactive species. It was found that OH, 1O2 and IO3 play a key role in TB degradation whereas O2- acts mainly as a free-radical precursor. The experimental conditions that affected ..