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Photoconversion of 2-Chloronaphthalene in Water

Abstract

The photoconversion of 2-chloronaphthalene (CN-2) in water in a simulated sunlight system was investigated. The photoconversion efficiency, photoproducts and mechanisms were inspected, and the effects of inorganic ions (NO3 , NO2 ) and fulvic acid (FA) were discussed. The results showed that CN-2 could be transformed in water under the irradiation. NO3 and NO2 promoted the photoconversion of CN-2 owing to ·OH generated by the photolysis of NO3 and NO2 ; FA at a lower concentration promoted the photoconversion, but it had an inhibition effect at a higher concentration. It was demonstrated that the acidic conditions promoted the photoconversion of CN-2 by the active groups such as superoxide radical anion, hydrogen peroxide and hydroxyl radical produced in the system. Eight photoproducts of CN-2 were characterized by the GC-MS method and the possible photoconversion mechanisms were proposed accordingly.

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Acknowledgements

This research was supported by the National Natural Science Foundation of China (No. 41073063 and No. 41403101).

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Correspondence to Tao Tian.

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Kang, C., Bao, S., Chen, B. et al. Photoconversion of 2-Chloronaphthalene in Water. Bull Environ Contam Toxicol 99, 415–421 (2017). https://doi.org/10.1007/s00128-017-2146-y

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Keywords

  • 2-Chloronaphthalene
  • Photoconversion
  • Water
  • Hydroxyl radical