【摘要】 研究了Ti/SnO2-Sb2O5/PbO2和Ti/Ru-Ti-Sn阳极对苯酚电化学氧化降解时氯离子的作用.结果表明,在电解液中加入氯离子能提高苯酚的去除效率并完全降解苯酚.无氯离子时,有机物电化学降解主要以直接电氧化方式进行;当氯离子存在时,不仅发生直接电氧化,而且发生了间接电氧化.对于析氯阳极体系(如Ti/Ru-Ti-Sn阳极),主要发生有机物的间接电氧化;对于高氧超阳极体系(如Ti/SnO2-Sb2O5/PbO2阳极),有机物的间接和直接电氧化同时发生.氯离子对有机物的间接电氧化起类似媒介的作用,这种作用主要是由于氯离子在有机物氧化过程中阳极表面层和溶液本体电生成了氯离子或活性氯的氧化还原媒介.更多还原

【Abstract】 Influence of chloride ion as the electrolyte on electrochemical oxidation of phenol with both Ti/SnO2-Sb2O5/PbO2 and Ti/Ru-Ti-Sn oxide coating anode was investigated.The results showed that the addition of chloride ions in the electrolyte caused increasing in removal efficiency and the complete degradation of phenols pollutants.The main way of electrochemical degradation of phenol without chloride ion was direct electrochemical oxidation.It could contain both direct and indirect electrochemical oxidation during the degradation of phenol with chloride ion.It would mainly start with phenol indirect electrochemical oxidation on anode that could generate chlorine(such as Ti/Ru-Ti-Sn anode).For high oxygen evolution anode system,such as Ti/PbO2 anode,direct and indirect electrochemical oxidation of organic matter may occur at the same time.Effects of chloride ion on indirect electrochemical oxidation of organic matter is similar to the actions of medium body.The medium is mainly due to the generation of oxidation and reduction of the media of chloride ion and active chlorine in the surface layer and bulk solution during the process of organic oxidation.更多还原