钌铱电极与BDD电极处理以氯化钠为电解质的染料废水的对比研究

Comparative Study of RuO_(2)-IrO_(2) Electrode and BDD Electrode on the Treatment of Dyeing Wastewater with Sodium Chloride as Electrolyte

本文以钌铱电极和BDD电极为研究对象,以氯化钠为电解质,考察了两种电极对染料废水中难降解有机物的去除差异,研究电流密度、pH值和氯化钠浓度对染料去除的影响,探究染料降解过程中的自由基贡献。结果表明:钌铱电极和BDD电极均能有效去除染料,但BDD电极的效率更高。最适宜的去除条件为电流密度为10mA/cm^(2)、pH值为5和氯化钠浓度为2g/L,此条件下反应速率常数可达2.964min^(-1)。·OH被证实对污染物的去除贡献最大。

In this study,the difference between RuO_(2)-IrO_(2) electrode and BDD electrode on the treatment of dye wastewater was studied using sodium chloride(NaCl)as electrolyte.The effect of current density,pH value and NaCl concentration on the removal of the dye was studied as well.Furthermore,the contribution of the reactive species(free radical)also was studied.The results showed that both RuO_(2)-IrO_(2) electrode and BDD electrode could remove the dyer from the wastewater while BDD electrode possessed better performance.The optimal operation conditions were current density of 10 mA/cm^(2),pH value of 5 and NaCl concentration of 2 g/L,which k value was 2.694 min^(-1).Hydroxyl radical(·OH)was proven to contribute most during the removal.