亚氧化钛纳米管阳极对水中甲萘威的电化学降解

为探究电化学阳极氧化技术降解水中甲萘威的效率和能耗，通过电化学氧化-自掺杂还原法制备了高活性亚氧化钛纳米管(Ti/Ti₄O₇-NTA)阳极，比较了其与Ti/Ti₄O₇、Ti/Ti₄O₇-PbO₂-Ce阳极电化学降解甲萘威活性；考察了电流密度、甲萘威初始质量浓度、电解质种类、溶液初始pH等参数对甲萘威降解率的影响；分析了甲萘威电化学反应能耗和电流效率。结果表明：Ti/Ti₄O₇-NTA阳极电化学活性较高，电化学降解甲萘威效率和溶液总有机碳去除率可达96.1%和80.2%；在pH为3~11时，甲萘威降解率为88.8%~92.1%，降解率随电流密度增大而增大，随初始质量浓度增大而减小；甲萘威电化学反应能耗和电流效率分别为215.3 kWh和66.1%。由此可知，Ti/Ti₄O₇-NTA阳极应用于电化学氧化处理有机农药废水具有良好潜力。本研究成果可为电化学氧化技术处理有机农药废水提供参考。

Electrochemical degradation of carbaryl in water over the Ti/Ti4O7-NTA anode

To explore the performance and energy consumption of electro-oxidation technology for carbaryl degradation in water, a highly active Ti/Ti4O7-NTA anode was synthesized via the electro-oxidation within self-doping reduction technology, and its reactivity for carbaryl electro-oxidation was analyzed and compared with the Ti/Ti4O7 and Ti/Ti4O7-PbO2-Ce anodes. The effects of influencing parameters including current density, initial carbaryl concentration, electrolyte type, and initial pH on the electro-degradation kinetics of carbaryl were investigated. The energy consumption and current efficiency of electro-oxidizing carbaryl over the Ti/Ti4O7-NTA anode were also highlighted. The results showed that Ti/Ti4O7-NTA anode had a high electrochemical activity for carbaryl electro-oxidation, and the carbaryl electro-degradation and TOC removal efficiencies reached 96.1% and 80.2%, respectively. At pH 3~11, the degradation efficiencies of carbaryl were 88.8%~92.1%, and they increased with current density increasing, and decreased with the increase of initial carbaryl concentration. The energy consumption and current efficiency of carbaryl electro-oxidation were 215.3 kWh and 66.1% in 40 minutes reaction, respectively. It can be concluded that the Ti/Ti4O7-NTA anode may have a satisfactory application potential for the treatment of organic pesticide wastewater. This study can provide a reference for the treatment of organic pesticide wastewater by electrochemical oxidation technology.