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Atmospheric reactions of 9,10-anthraquinone

Abstract : The probably carcinogenic compound 9,10-anthraquinone is mainly existing in the atmosphere in the particulate phase and is often detected and measured among other oxygenated PAHs in atmospheric samples. Its fate, once released or formed in the atmosphere, still remains unknown. In this work, heterogeneous chemical oxidation processes of 9,10-anthraquinone were investigated with ozone (O 3), nitrogen dioxide (NO 2) and hydroxyl radical (OH). The study of 9,10-anthraquinone adsorbed on silica particles showed no reactivity with O 3 and NO 2. On the other hand, the reaction with OH radicals was observed and led to the formation of 1-hydroxy-9,10-anthraquinone, another oxidation product recognized as possibly carcinogenic to humans. This study showed that reactions with ozone and nitrogen dioxide are unlikely to contribute to atmospheric degradation of 9,10-anthraquinone, whereas reactions with OH radicals could be involved in 9,10-anthraquinone degradation processes, even if such reaction is probably very slow under ambient conditions.
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Killian Miet, Alexandre Albinet, Hélène Budzinski, Eric Villenave. Atmospheric reactions of 9,10-anthraquinone. Chemosphere, Elsevier, 2014, 107, pp.1-6. ⟨10.1016/j.chemosphere.2014.02.050⟩. ⟨ineris-01710231⟩

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