Catalytic oxidation of chloromatic trace contaminations adsorbed on Wessalith DAY by ozone

Oxidation of several chloroaromatic compounds (polychlorinated benzenes ClxBz, biphenyls PCB and dibenzo -p-dioxins and dibenzofurans PCDD/F) adsorbed on Wessalith DAY, a hydrophobic zeolite, by ozone was investigated. Laboratory-scale experiments were performed, investigating reaction products and kinetic parameters to elucidate the mechanism for some PCDD/F model compounds. In the presence of water, OH radicals were found to be the reactive species. The reaction rate (pseudo-first order law) of ClxBz, PCB, and PCDD/F was investigated at several reaction temperatures (50, 70, and 90 °C). A zeolite sample from a hazardous waste incinerator (HWI) was treated with ozone and gave similar results.