难生化降解芳香化合物废水的电催化处理

Advanced Electrochemical Oxidation Process for Treatment of Biorefractory Wastewater Containing Typical Aromatic Compounds

经氟树脂改性的 β PbO2 电极作为新型阳极 ,对几种含典型难生化降解芳香化合物 ,苯胺、氯苯、对氯苯酚、对硝基酚的模拟废水进行了电催化降解 .结果表明 ,在 0 2 5A的电流下处理 2h ,目标有机物去除率达到 75 %～1 0 0 % ,COD去除率为 2 0 %～ 5 5 % .处理效果 :苯胺 >氯苯 >对氯苯酚 >对硝基酚 .较高的电流和有机物初始浓度更有利于有机物的降解 .检测到了降解的共同中间产物对苯醌、反丁烯二酸、草酸 。

Biorefractory wastewater containing one kind of typical aromatic compounds, i.e., aniline, chlorobenzene, p chlorophenol and p nitrophenol, was investigated by Advanced Electrochemical Oxidation Process (AEOPs) on a novel β PbO 2 anode modified by fluorine resin. Under current of 0 25A, the removal rate for organic compounds and COD of the wastewater in 2 hours was around 75%～100%, and 22%～55%, respectively, following by the sequence of aniline, chlorobenzene, p chlorophenol and p nitrophenol. Higher current and initial organic compound concentration could enhance the wastewater treatment efficiencies. Benzoquinone, fumaric acid and oxalic acid were detected as the common degradation intermediates by HPLC, based on which a general degradation pathway of these aromatic compounds was further proposed.