2012 Fiscal Year Final Research Report
Influences of humic acids on the degradation and toxicity of brominated flame retardants by oxidation catalysts
| Project/Area Number |
21310048
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| Research Category |
Grant-in-Aid for Scientific Research (B)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Environmental technology/Environmental materials
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| Research Institution | Hokkaido University |
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Principal Investigator |
FUKUSHIMA Masami 北海道大学, 大学院・工学研究院, 准教授 (40344113)
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| Co-Investigator(Kenkyū-buntansha) |
KURAMITZ Hideki 富山大学, 理工学研究部, 教授 (70397165)
NAGAO Seiya 金沢大学, 環日本海域環境研究センター, 教授 (20343014)
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| Project Period (FY) |
2009 – 2012
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| Keywords | 環境技術 / 水質汚濁・土壌汚染防止・浄化 / 触媒・化学プロセス / 超分子化学 |
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| Research Abstract |
Influences of humic acids on the catalytic oxidation of tetrabromobisphenol A (TBBPA) using iron(III)-porphyrin catalysts were investigated. The TBBPA was difficult to be oxidized and dehalogenated by the catalysts, compared to chlorinated phenols that had been investigated. In the catalytic oxidation of TBBPA, oxidative coupling reactions that can produce the oligomers were dominant. In the presence of humic acids, coupling compounds between oxidation intermediates from TBBPA and humic acid were mainly formed, and percents conversion of TBBPA to the coupling compounds were from 50 to 60%. The toxicity tests of the reaction mixtures in the absence and presence of humic acids by the inhibition of an algae (P.subcapitata) growth demonstrated that toxicity of TBBPA was reduced in the presence of humic acids.
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