Phenol degradation in an electrochemical system with stainless steel as electrode

• Main Authors: Li, Je-Wei, 李哲偉
• Other Authors: Dong Cheng-Di
• Format: Others
• Language: zh-TW
• Published: 2014
• Online Access: http://ndltd.ncl.edu.tw/handle/16009378244544023071

碩士 === 國立高雄海洋科技大學 === 海洋環境工程研究所 === 102 === In this study, phenol degradation was studied in an electrochemical system with stainless steel as anode and cathode, to explore the optimal electrolytic oxidation parameters for real field application process and to investigate the support of carbon black coating on stainless steel plate as the anode material and impact of ultrasound on the efficiency of electrolysis. The effect of various controlling factors including pH, current density, electrolyte concentration, initial concentration of phenol were performed under operating condition of experiment using stainless steel electrodes for degradation of phenol. The optimal parameters were pH=6.50, current density of 9.79 mA/cm2, electrolyte concentration (Na2SO4) of 0.1 N and the initial concentration of phenol of 100 mg/L after 180 minutes, causing the electrolytic oxidation efficiency of 70% degradation. Under the optimal conditions of the electrolytic oxidation, carbon black material coating on stainless steel plate was applied in electrochemical system. The results showed that the efficiency to remove phenol after 180 mintues was 94%, an increase of 24% in comparison with simple used stainless steel anode in electrolysis system. In addition, sonication contributed possitive effect to modify the electrochemical oxidation of phenol, namely, the efficiency to remove phenol after 180 mintues was 87%, an increase of 17% in comparison with the removal efficiency of simple electrochemical oxidation. Electrical degradation efficiency significantly increased with the support of either carbon black coating on stainless steel or utilization of sonication in electrolysis systems.