ペンタクロロフェノールの光分解及びＤＦＴ法による分解経路の推定

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  • Photodegradation of Pentachlorophenol and Its Degradation Pathways Predicted Using Density Functional Theory
  • ペンタクロロフェノール ノ ヒカリ ブンカイ オヨビ DFTホウ ニ ヨル ブンカイ ケイロ ノ スイテイ

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説明

The objectives of the present research were (i) to report the mass balance of chlorine during pentachlorophenol (PCP) photodegradation and (ii) to reveal the photodegradation pathway experimentally with a theoretical proof based on the density functional theory (DFT). The chlorine of PCP was completely mineralized to produce chloride ions after 24 hours of UV irradiation. As intermediates, 2,3,5,6-tetrachlorophenol, 2,3,4,6-tetrachlorophenol and 2,5-dichlorophenol were identified. At least 80% of the chlorine balance during PCP photodegradation was accounted by PCP, these intermediates, and chloride ions. A DFT calculation showed differences in the C-Cl bond dissociation energy level and the positions of respective PCP molecular and the PCP intermediates. The dechlorination intermediates predicted using the calculated C-Cl bond dissociation energy were consistent with those experimentally confirmed, indicating the feasibility of this theoretical method in predicting the dechlorination pathway.

収録刊行物

  • 水環境学会誌

    水環境学会誌 26 (11), 693-697, 2003

    公益社団法人 日本水環境学会

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