Degradation of organic wastewater containing EDTA by Fe-C micro-electrolysis

作者：Chen Run Hua^*; Chai Li Yuan; Wang Yun Yan; Shu Yu De; Jiang Guo Min

来源：Journal of Central South University(Science and Technology), 2011, 42(6): 1516-1521.

• Contact time
• EDTA
• Inert electrodes
• Influencing parameters
• Mass ratio
• Micro-electrolysis
• Novel techniques
• OH radical
• Optimal conditions
• Organic wastewater
• Organic wastewater treatment
• Oxygen-rich conditions
• Removal rate
• Room temperature
• Thermodynamic relationships

A novel technique based on Fe-C micro-electrolysis (FAC) to treat the organic wastewater was proposed, which was used to treat EDTA-containing organic wastewater. In this study, activated carbon and iron were taken as the inert electrode and the cathode, respectively. EDTA in the wastewater could be degradated effectively by &middotOH gemerated under the acidic and oxygen-rich conditions. The mechanism and influencing parameters of organic wastewater treatment by FAC were investigated. Thermodynamic relationship was deduced, which could be used to interpret all of the parameters effecting EDTA removal rate reasonably. The results show that the residual TOC is affected by pH of influent, dissolved oxygen DO, temperature, contact time and Fe/C mass ratio, and the conditions are as follows: pH is 2-4, room temperature, Fe/C mass ratio is more than 0.01, contact time is more than 30 min, and oxygen exists. Under the optimal conditions the removal rate of EDTA with 200 mg/L concentration can reach 83.8%.

• 出版日期2011
• 单位中南大学