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Treatment of Phenol Wastewater Using Hydroxyl Radical Produced by Micro-Gap Discharge Plasma Technique

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Hydroxyl radical produced by non-equilibrium plasma, which was induced by micro-gap dielectric barrier discharge, was used for the treatment of phenol wastewater. The advantage of this method was that chemicals and catalysts were not involved when hydroxyl radical was generated from water and oxygen. A proportional efficiency of phenol removal was observed with the hydroxyl radical increasing. The removal efficiency was higher in a basic condition than in an acidic condition, which was enhanced with the pH value of the solution increasing from 3.6 to 11.2. It was rational to adjust the pH value between 9.0 and 10.0. The removal efficiency of phenol was reduced when the conductivity of the solution increased from 0 to 200 μs · cm −1; the highest was found in the solution without Na 2CO 3. The UV spectral absorption in the process indicated that few organic compounds with a conjugated structure were included in the treated wastewater.
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Keywords: UV spectrum; dielectric barrier discharge plasma; dielectric materials; effect; phenol wastewater

Document Type: Research Article

Affiliations: Institute of Environmental Engineering, Key Laboratory of Strong Electric-Field Ionization Discharge of Liaoning Province, Dalian Maritime University, Dalian, P. R. China.

Publication date: 2009-04-01

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    Water Environment Research (WER) publishes peer-reviewed research papers, research notes, state-of-the-art and critical reviews on original, fundamental and applied research in all scientific and technical areas related to water quality, pollution control, and management. An annual Literature Review provides a review of published books and articles on water quality topics from the previous year.

    Published as: Sewage Works Journal, 1928 - 1949; Sewage and Industrial Wastes, 1950 - 1959; Journal Water Pollution Control Federation, 1959 - Oct 1989; Research Journal Water Pollution Control Federation, Nov 1989 - 1991; Water Environment Research, 1992 - present.
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