グリーンアジアのためのエネルギーおよび資源確保の戦略

[A1-17] 機能化された担体への鉄(III)-ポルフィリン触媒の担持による臭素化フェノール類の促進酸化に関する研究

^○朱倩倩, 宮本貴文, 福嶋正巳 (北海道大学大学院工学研究院)

司会:島田英樹(九州大学工学研究院)

Keywords:Bromophenol, Iron(III)-porphyrin, Humic substances, Oxidation, Immobilized catalysts

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.