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Plasma Chemistry and Plasma Processing

, Volume 33, Issue 6, pp 1043–1052 | Cite as

Plasma-Induced Decomposition of Dichlorophenols and Trichlorophenols in Water by Means of Anodic Contact Glow Discharge Electrolysis

  • Haiming Yang
  • Caixia
  • Meguru Tezuka
Original Paper

Abstract

Decomposition of aqueous dichlorophenols and trichlorophenols was investigated by means of contact glow discharge electrolysis. With the decay of chlorophenols (CPs), the amount of total organic carbon (TOC) in water also decreased smoothly, indicating that carbon atoms of benzene nucleus could be eventually converted to inorganic carbons. And, it was found that chlorine atoms in the CPs were released as chloride ions. As the by-products, oxalate and formate were formed. The chlorine derivatives of 1,4-hydroquinone and 1,4-benzoquinone were detected as the primary intermediates in the initial stage of decomposition of each of CPs. The decay of both CPs and TOC obeyed the first-order rate law, respectively. The apparent rate constants for the decay of CPs increased with the decrease in pKa values of CPs, while those for the decay of TOC were substantially unaffected.

Keywords

Chlorophenols Decomposition Contact glow discharge electrolysis First-order rate law pKa 

Notes

Acknowledgments

This work was supported by the National Natural Science Foundation of China (Grant No. 51308276) and the Youth Science Foundation of University of Science and Technology Liaoning (Grant No. 2012QN02).

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Copyright information

© Springer Science+Business Media New York 2013

Authors and Affiliations

  1. 1.School of Chemical EngineeringUniversity of Science and Technology LiaoningAnshanChina
  2. 2.Graduate School of EngineeringSaitama Institute of TechnologyFukayaJapan

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