电还原铁促进芬顿氧化邻苯二酚的研究

采用电沉积的方式在钛基体上修饰纳米银做阳极,以石墨电极为基体修饰碳纳米管与石墨烯为阴极,构建电化学系统持续还原芬顿(Fenton)体系中的Fe 3+来促进反应进行,从而减少Fenton氧化法初始铁盐的投加量以及最终铁泥的产生量,提升降解效率。在普通Fenton体系中植入该电化学还原系统并与普通Fenton氧化体系进行对比,采用电化学方法对环境污染物邻苯二酚(CC)的降解结果进行检测。结果表明:所构建的电化学系统对Fe 3+有良好的还原效果,其阴极还原电位约为0.2 V,电还原60 min对Fe 3+的还原率可达52.9%。与普通Fenton体系对比后发现,该电化学还原系统的引入可以减少50%初始铁盐投加量,达到节约成本并减少铁泥产出的目的,在普通Fenton体系适用pH范围内对降解效果有明显提升,最终优化条件下降解率可达98.08%。

Electroreduced iron promotes Fenton oxidation of catechol

Electrodeposition of nano-silver as anode on titanium substrate,modification of carbon nanotubes and graphene as cathodes using graphite electrodes as matrix,constructing an electrochemical system to continuously reduce Fe 3+in the Fenton system to promote the reaction,thereby reducing the dosage of the initial iron salt in the Fenton oxidation method and the amount of the final iron sludge,and improving the degradation efficiency.The electrochemical reduction system was implanted in a conventional Fenton system to compare with the conventional Fenton oxidation system,and the degradation results of environmental pollutants catechol(CC)were detected by electrochemical methods.The result shows:the electrochemical system constructed has a good reducing effect on Fe 3+,its cathode reduction potential is about 0.2V,the reduction rate of Fe 3+by electro-reduction for 60 min can reach 52.9%.Compared with the ordinary Fenton system,it was found that the introduction of the electrochemical reduction system can reduce the initial iron salt dosage by 50%,achieve cost savings and reduce iron sludge production,and the degradation effect is obviously improved in the applicable pH range of the ordinary Fenton system,and the degradation rate can reach 98.08%under the optimal conditions.