MMIJ Annual Meeting

Bromophenols are widely used as reactive brominated flame retardant in the production of electronic equipments. The high levels of bromophenols have been found in landfill leachates. Due to the potential environmental risks, bromophenols in leachates must be degraded and detoxified. Iron(III)-porphyrins show high catalytic activity on the catalytic degradation of halogenated phenols as biomimetic catalysts in homogeneous conditions. However, the deactivation of iron(III)-porphyrins was caused by self-degradation in the presence of oxygen donors such as KHSO₅ and H₂O₂. In addition, the presence of humic substances (HSs), which widely distribute in leachates, inhibits the catalytic oxidation of bromophenols by iron(III)-porphyrins. To enhance the reusability of the catalysts and remove the HS inhibition, iron-porphyrins were immobilized on the supports with a variety of functions, such as large negative electrostatic field and size selectivity.