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针对高盐废水成分复杂、可生化性差等处理难题,采用等离子喷涂技术制备一种新型钛基体亚氧化钛电极——Ti
4
O
7
电极,对该电极性能进行全面评价,解释电极的失效机理,并将其应用于高盐体系下的有机物电催化降解过程,考察不同因素对降解效果的影响。结果表明:Ti
4
O
7
电极具备丰富的孔洞结构、较高的析氧过电位、优异的导电性能和良好的稳定性。高盐体系下,电流密度的提高会促进酸性红G染料降解,但单位能耗会显著增加;含盐量和pH值对降解效果的影响甚微,这也得益于亚氧化钛材料电极的稳定性能;在电流密度为15 mA/cm
2
、含盐量为1%、初始pH值为8.5时,降解效果最佳,120 min内脱色率为99.91%
化学需氧量(COD)去除率为71.88%。Ti
4
O
7
电极在高盐废水的电化学处理领域有良好的应用前景。
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