title: Intrinsic Chemiluminescence Generation during Advanced Oxidation of Persistent Halogenated Aromatic Carcinogens.
abstract: The ubiquitous distribution coupled with their carcinogenicity has raised public concerns on the potential risks to both human health and the ecosystem posed by the halogenated aromatic compounds (XAr). Recently, advanced oxidation processes (AOPs) have been increasingly favored as an "environmentally-green" technology for the remediation of such recalcitrant and highly toxic XAr. Here, we show that AOPs-mediated degradation of the priority pollutant pentachlorophenol and all other XAr produces an intrinsic chemiluminescence that directly depends on the generation of the extremely reactive hydroxyl radicals. We propose that the hydroxyl radical-dependent formation of quinoid intermediates and electronically excited carbonyl species is responsible for this unusual chemiluminescence production. A rapid, sensitive, simple, and effective chemiluminescence method was developed to quantify trace amounts of XAr and monitor their real-time degradation kinetics. These findings may have broad biological and environmental implications for future research on this important class of halogenated persistent organic pollutants.
authors.affiliation: †State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Sciences, The Chinese Academy of Sciences, Beijing, P. R. China 100085.
authors.forename: Li
authors.initials: L
authors.lastname: Mao
authors.affiliation: †State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Sciences, The Chinese Academy of Sciences, Beijing, P. R. China 100085.
authors.forename: Yu-Xiang
authors.initials: YX
authors.lastname: Liu
authors.affiliation: †State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Sciences, The Chinese Academy of Sciences, Beijing, P. R. China 100085.
authors.forename: Chun-Hua
authors.initials: CH
authors.lastname: Huang
authors.affiliation: †State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Sciences, The Chinese Academy of Sciences, Beijing, P. R. China 100085.
authors.forename: Hui-Ying
authors.initials: HY
authors.lastname: Gao
authors.affiliation: ‡Biophysics Research Institute, Medical College of Wisconsin, Milwaukee, Wisconsin 53226, United States.
authors.forename: Balaraman
authors.initials: B
authors.lastname: Kalyanaraman
authors.affiliation: †State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Sciences, The Chinese Academy of Sciences, Beijing, P. R. China 100085.|§Linus Pauling Institute, Oregon State University, Corvallis, Oregon 97331, United States.
authors.forename: Ben-Zhan
authors.initials: BZ
authors.lastname: Zhu
mesh_terms: D002273:Carcinogens / Q000737:chemistry*; D004492:Edetic Acid / Q000737:chemistry; D004777:Environment; D006841:Hydrocarbons, Aromatic / Q000032:analysis*; D006846:Hydrocarbons, Halogenated / Q000032:analysis*; D006861:Hydrogen Peroxide / Q000737:chemistry; D017665:Hydroxyl Radical / Q000737:chemistry; D007501:Iron / Q000737:chemistry; D007700:Kinetics; D049449:Luminescence; D010084:Oxidation-Reduction; D010126:Ozone / Q000737:chemistry; D010416:Pentachlorophenol / Q000737:chemistry
chemical_list: D002273:Carcinogens; C045076:Fenton's reagent; D006841:Hydrocarbons, Aromatic; D006846:Hydrocarbons, Halogenated; D017665:Hydroxyl Radical; D010126:Ozone; D004492:Edetic Acid; D006861:Hydrogen Peroxide; D010416:Pentachlorophenol; D007501:Iron