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Research on photosensitivity of benzoquinones and benzoquinoneimines in the sunlight/Fe2+/S2O8 2− system

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Abstract

This paper investigated the photodegradation characteristics of benzoquinones and benzoquinoneimines. The photosensitivity of benzoquinones and benzoquinoneimines were analyzed by measuring the yield of SO −·4 in a light/Fe2+/S2O8 2− system and the degradation mechanism of benzoquinones, then discussed benzoquinoneimines in light/Fe2+/S2O8 2− and light/S2O8 2− system. The results revealed that a more aggressive oxidation of benzoquinones and benzoquinoneimines by the sunlight/Fe2+/S2O8 2− method showed a more rapid and more complete removal of chromaticity than that of the UV/Fe2+/S2O8 2− method. It was showed that they were photosensitizers, and they could generate 1O2 and O −·2 which could promote the formation of SO −·4 and ·OH in the sunlight system. Nevertheless, for benzoquinones, the sunlight/S2O8 2− method was superior to the UV/S2O8 2− method. For benzoquinoneimines, the sunlight/S2O8 2− method was inferior to the UV/S2O8 2− method. In addition, the yield of SO −·4 in the sunlight/Fe2+/S2O8 2− system was more than that of the UV/Fe2+/S2O8 2− system. Therefore, the photosensitivity of benzoquinones is superior to benzoquinoneimines in water treatment.

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Acknowledgments

The authors are grateful to the financial support by the Open Project of the State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology (QAK20103).

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Authors and Affiliations

  1. College of Environmental Science and Engineering, Dalian Maritime University, Dalian, 116026, China

    Anjing Wang, Junmei He, Lingna Kong & Naidong Zhang

  2. State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology, Harbin, 150090, China

    Naidong Zhang & Tong Zheng

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  1. Anjing Wang
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  2. Junmei He
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  4. Naidong Zhang
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  5. Tong Zheng
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Correspondence to Naidong Zhang.

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Wang, A., He, J., Kong, L. et al. Research on photosensitivity of benzoquinones and benzoquinoneimines in the sunlight/Fe2+/S2O8 2− system. Res Chem Intermed 43, 2175–2186 (2017). https://doi.org/10.1007/s11164-016-2753-y

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  • DOI: https://doi.org/10.1007/s11164-016-2753-y

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