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2001•Natural Science Journal of Xiangtan UniversityRequires access

Study on Phenolic Wastewater Treatment by Wet Electrochemical Oxidation

Zhou Shu-tian

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Abstract

As a new improved method of WAO (wet a ir oxidation), wet electrochemical oxidation (WEO), uses HClO and ·OH generated by electrochemical system as the oxidizing agent instead of oxygen. This paper introduce the wet electrochemical oxidation treatment of phenolic so lution simulated wastewater. During the experiment, we study the effect of pH, H 2O2/phenl, electric current density, reaction time and temperature o n the removal rate of phenol and COD. The results show that if the temperature i s kept at 110～160 ℃, the electric current density at 6～9 mA/cm2, the pH at 3～3.5, the H2O2/phenol0.06, the phenolic wastewater of 200 mg/L as initial concentration will get the removal above 98%, accompanied by the removal rate of COD over 70%.

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What this paper is about

As a new improved method of WAO (wet a ir oxidation), wet electrochemical oxidation (WEO), uses HClO and ·OH generated by electrochemical system as the oxidizing agent instead of oxygen. This paper introduce the wet electrochemical oxidation treatment of phenolic so lution simulated wastewater. During the experiment, we study the effect of pH, H 2O2/phenl, electric current density, reaction time and temperature o n the removal rate of phenol and COD. The results show that if the temperature i s kept at 110～160 ℃, the electric current density at 6～9 mA/cm2, the pH at 3～3.5, the H2O2/phenol0.06, the phenolic wastewater of 200 mg/L as initial concentration will get the removal above 98%, accompanied by the removal rate of COD over 70%.

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Available abstract

As a new improved method of WAO (wet a ir oxidation), wet electrochemical oxidation (WEO), uses HClO and ·OH generated by electrochemical system as the oxidizing agent instead of oxygen. This paper introduce the wet electrochemical oxidation treatment of phenolic so lution simulated wastewater. During the experiment, we study the effect of pH, H 2O2/phenl, electric current density, reaction time and temperature o n the removal rate of phenol and COD. The results show that if the temperature i s kept at 110～160 ℃, the electric current density at 6～9 mA/cm2, the pH at 3～3.5, the H2O2/phenol0.06, the phenolic wastewater of 200 mg/L as initial concentration will get the removal above 98%, accompanied by the removal rate of COD over 70%.

Key concepts: Oxidizing agent, Electrochemistry, Wastewater, Phenol, Chemistry, Wet oxidation, Current density, Nuclear chemistry

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