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Effects of Operating Parameters on Phenol Degradation by Pulsed Corona Discharges in Aqueous Solutions  

Chung, Jae-Woo (Department of Environmental Engineering, Jinju National University)
Moon, Ji-Hoon (Department of Environmental Engineering, Jinju National University)
Park, Eun-Ok (Department of Environmental Engineering, Jinju National University)
Publication Information
Abstract
Effects of operating parameters such as applied voltage, solution conductivity, ferrous ion concentration, electrode material on phenol degradation by pulsed corona discharges were investigated in laboratory scale experiments. The increase of applied voltage enhanced the phenol degradation by generating more energetic electrons. The solution conductivity inversely affected phenol removal rate in the tested ranges because the increase of conductivity decreased the electric field strength through the liquid phase. The addition of ferrous sulfate promoted the phenol degradation through the OH radical production by the Fentonlike reactions between ferrous ion and hydrogen peroxide generated by pulsed corona discharges. Catechol and hydroquinone were detected as primary intermediates of phenol degradation and the decrease of pH and the increase of conductivity were observed probably due to the generation of organic acids. Almost all of the initial phenol was disappeared and 29% of total organic corbon (TOC) was removed in the condition of 0.5 mM of ferrous sulfate after approximately 230 kJ of discharge energy transferred to the reactor.
Keywords
Pulsed corona discharges; Phenol degradation; Operating parameters;
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Times Cited By KSCI : 2  (Citation Analysis)
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