活性炭纤维作电极的高级电化学氧化技术对直接深蓝L-3RB的矿化

Mineralization of direct deep blue L-3RB by advanced electrochemical oxidation processes using activated carbon fiber electrodes

以活性炭纤维作为新型电极,采用高级电化学氧化工艺(AEOPs)对直接深蓝L-3RB(DDBL- 3RB)进行了矿化研究.AEOPs过程包含了两种不同的电化学过程——电Fenton和光电Fenton过程,60mg/L的含50mmol/L Na_2SO_4的DDBL-3RB溶液被用于矿化研究,结果表明光电Fenton过程具有最高的初始总有机碳去除率以及脱色率,这两种高级电化学氧化过程的机理都可以归结为Fe^(2+)和电生H_2O_2反应所产生的羟基自由基对DDBL-3RB的矿化降解。

The mineralization of direct deep blue L-3RB （DDBL-3RB） was studied by advanced electrochemical oxidation processes （AEOPs） using activated carbon fiber electrodes. Two different processeselectro-Fenton and photoelectro-Fenton were involved. A solution of 60 mg/L DDBL-3RB containing low salt content, 0.05 mol/L Na2SO4 was used for the mineralization purpose. It was found that the photoelectro- Fenton process showed higher total organic carbon and color removal ratio. The degradation mechanism of these AEOPs is due to the hydroxyl radicals produced by the reaction between Fe^2＋ and electrogenerated H2O2.