摘要
采用投加聚电解质Nafion和表面活性剂SDS的方式对Ti/Sb-SnO_(2)/PbO_(2)阳极进行改性,并分析电解质浓度、pH、电流密度、极板间距对废水处理效果的影响。结果表明,Nafion和SDS的加入使得电极表面更加致密,析氧电位较未改性前提升0.1 V,改性后电极废水脱色率和COD去除率分别提升14.93%和19.35%。工艺处理条件为电解质质量浓度为1.5 g/L、pH=4、电流密度为40 mA/cm^(2)、极板间距为2.5 cm,此时脱色率和COD去除率分别达到91.95%和78.4%。在该体系中·OH自由基为起主要作用的活性基团,反应体系符合拟一级动力学方程。改性后的电极对酸性橙7水样具有较好的处理效果,为电催化技术在废水处理领域的应用提供了技术支撑。
Ti/Sb-SnO_(2)/PbO_(2) anode is modified by adding Nafion polyelectrolyte and SDS surfactant,and used to evaluate the influences of electrolyte concentration,pH,current density,and plate spacing on the wastewater treatment effect.Results show that the addition of Nafion and SDS makes the surface of the electrode denser,and causes the oxygen precipitation potential to increase by 0.1 V.The decolorization rate and COD removal rate of wastewater by the modified electrode increase by 14.93%and 19.35%,respectively.The decolorization rate and COD removal rate reach 91.95%and 78.4%,respectively under the process treatment conditions that mass concentration of electrolyte is 1.5 g/L,pH=4,current density is 40 mA/cm^(2),and electrode plate spacing is 2.5 cm.In this system,—OH radical is the active group to play a main role,and the reaction system accords with the proposed one-stage kinetic equation.The modified electrode presents good treatment effect on acidic orange 7 water samples,which provides technical support for the application of electrocatalytic technology in the field of wastewater treatment.
作者
李亚峰
刘奕含
郭鹏成
LI Ya-feng;LIU Yi-han;GUO Peng-cheng(School of Municipal and Environmental Engineering,Shenyang Jianzhu University,Shenyang 110168,China)
出处
《现代化工》
北大核心
2025年第3期88-93,99,共7页
Modern Chemical Industry
基金
国家水体污染控制与治理科技重大专项(2018ZX07601-001)。
