Inclusion complex of iron(III)-tetrakis(p-sulfonatephenyl)porphyrin with 2,3,6-tri-O-methyl-β-cyclodextrin as a biomimetic model of oxidative enzymes: Catalytic oxidation of tetrabromobisphenol A with peroxomonosulfate

Catalytic oxidation of tetrabromobisphenol A by iron(III)-tetrakis(p-sulfonatephenyl)porphyrin catalyst supported on cyclodextrin polymers with potassium monopersulfate

“…5 shows chromatograms of n-hexane extracts from reaction mixtures at pH 8. For each catalyst, a peak with a retention time of 17.8 min was detected as a major oxidation product, as reported previously [28]. This peak was assigned as 4- …”

“…These results indicate that the inhibition of TBBPA oxidation by HA is less in the case of the FeTPPS/␥-CDP catalyst. It has been reported that, in a homogeneous catalytic system, when concentration of FeTPPS increases, the degradation of TBBPA increases, even in the presence of HA [28]. Thus, the less inhibition in the FeTPPS/␥-CDP catalyst can be attributed to the higher loading amounts of FeTPPS.…”

“…The interiors of the CDs are hydrophobic and form inclusion complexes with a variety of organic molecules [18] as well as with metalloporphyrins [19][20][21][22][23][24]. Hydroxypropyl-␤-CD and 2,3,6-tri-O-methyl-␤-CD (TM-␤-CD) formed the inclusion complexes with FeTPPS, which resulted in a reduction in of catalyst self-degradation, resulting in the enhanced degradation of PCP or TBBPA in homogeneous systems using the FeTPPS catalyst [25][26][27][28].…”

“…Thus, it would be expected that CDP would form an inclusion complex with FeTPPS and suppresses catalyst self-degradation, since it is an analog to CD in homogeneous systems [25,27,28]. CDPs have been mainly utilized as adsorbents for the removal of organic pollutants from waste water [29][30][31][32] catalytic activities for the degradation of a halogenated phenol were evaluated.…”

“…Humic acids (HAs) are generated in landfills by the fermentation of organic waste and TBBPA is present in most landfill leachates [33]. A homogeneous catalytic system using the FeTPPS·TM-␤-CD complex is a useful model for the enzymatic oxidation of TBBPA in the presence of HA [28]. In the present study, to survey the possibilities for application of the FeTPPS-loaded CDP catalysts (FeTPPS/CDPs) to TBBPA oxidation in landfill leachates, the influence of HA on the degradation and debromination of TBBPA were investigated.…”