• 关键词：电化学氧化  亚氧化钛  膜电极  穿流式操作  印染工业废水

• 基金项目：国家自然科学基金优秀青年基金项目（No.51822806）；国家自然科学基金面上项目（No.51678184）；国家自然科学基金中国-新加坡国际合作项目（No.51761145031）

• 裴姝钊
• 哈尔滨工业大学环境学院, 城市水资源与水环境国家重点实验室, 哈尔滨 150090

• 朱琳
• 哈尔滨工业大学环境学院, 城市水资源与水环境国家重点实验室, 哈尔滨 150090

• 张梓萌
• 哈尔滨工业大学环境学院, 城市水资源与水环境国家重点实验室, 哈尔滨 150090

• 滕洁
• 哈尔滨工业大学环境学院, 城市水资源与水环境国家重点实验室, 哈尔滨 150090

• 刘雪峰
• 哈尔滨工业大学环境学院, 城市水资源与水环境国家重点实验室, 哈尔滨 150090

• 尤世界
• 哈尔滨工业大学环境学院, 城市水资源与水环境国家重点实验室, 哈尔滨 150090

• 摘要：电化学氧化法具有稳定高效、操作灵活、集成度高等特点，在处理难降解有机废水领域具有独特优势.电化学废水处理过程通常受限于传质速率，而膜电极有望解决这一瓶颈问题.亚氧化钛膜电极（TiSO-ME）的化学结构与电化学性质结果显示，经过高温还原法制备的TiSO-ME电极主要由Ti₄O₇和少量Ti₅O₉组成，大孔体积占总孔体积的92.7%，平均孔径为0.508 μm.电化学测试结果表明，TiSO-ME具有良好的导电性、高析氧电位和电化学稳定性.过滤试验结果表明，在0.82×10^-3~3.14×10^-3 mL·cm^-2·s^-1范围内膜通量与传质系数成正比.在电流密度为8 mA·cm^-2，膜通量为2.31×10^-3 mL·cm^-2·s^-1的条件下，电解1.5 h即可有效处理实际印染工业废水，sCOD去除率高达96.07%，电流效率可达24.22%，电能消耗较不存在膜通量时降低了32.99%.TiSO-ME能够实现废水在膜孔结构内部的穿流式操作，有效克服旁流式操作传质受限的问题，在小规模分散式工业废水处理中有着重要的研究价值和发展潜力.

• Abstract：Electrochemical oxidation (EO) process offers several unique advantages in refractory organic wastewater treatment by virtue of high efficiency,easy-to-handle operation and high integration.EO wastewater treatment is generally limited by the mass transfer rate,which can be alleviated by membrane electrode.The titanium suboxide membrane electrode (TiSO-ME) prepared by the high-temperature reduction method was mainly composed of Ti₄O₇ and a small amount of Ti₅O₉,whose macro-porous volume accounted for 92.7% of total volume with mean pore size of 0.508 μm.The electrochemical tests indicated that the TiSO-ME had good electrical conductivity,high oxygen evolution potential and electrochemical stability.The flow-through filtration test results showed that the mass transfer coefficient was positively proportional to the membrane flux over the range of 0.82×10^-3~3.14×10^-3 mL·cm^-2·s^-1.The effective EO treatment of industrial dyeing wastewater could be achieved under current density of 8 mA·cm^-2,permeation flux of 2.31×10^-3 mL·cm^-2·s^-1,and electrolysis time of 1.5 h.The soluble chemical oxygen demand (sCOD) could be removed by 96.07%,accounting for current density of 24.22%.The energy consumption was decreased by 32.97% in comparison with that without membrane filtration operation.The flow-through filtration operation allows TiSO-ME to achieve a significantly enhanced mass transfer during EO process,making small-scale decentralized wastewater treatment more efficient and more economical.

• Key words：electrochemical oxidation  titanium  suboxide-membrane electrode  flow-through operation  dyeing wastewater

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