电协同Fe^(2+)活化过硫酸盐处理偶氮染料废水的研究  

Study on the Treatment of Azo Dye Wastewater by Electro-synergistic Fe^(2+)Activated Persulfate

作　　者：李亚峰[1] 崔可清 王艺霖 LI Yafeng;CUI Keqing;WANG Yilin(School of Municipal and Environmental Engineering,Shenyang Jianzhu University,Shenyang 110168,China)

机构地区：[1]沈阳建筑大学市政与环境工程学院,辽宁沈阳110168

出　　处：《环境科学与技术》2024年第8期44-52,共9页Environmental Science & Technology

基　　金：国家水体污染控制与治理科技重大专项(2018ZX07601-001)。

摘　　要：偶氮染料废水会对自然环境和人类健康产生巨大危害。文章研究电协同Fe^(2+)活化过硫酸盐体系高效处理偶氮染料废水,以金橙G废水为处理对象,考察不同反应条件例如pH、Fe^(2+)投加量、过二硫酸盐(PDS)投加量、电流密度等因素对处理效果的影响,采用响应曲面法优化反应条件并确定最佳反应条件下的处理效果。结果表明,在pH为3、极板间距为9 cm、电流密度为15 mA/cm^(2)、PDS投加量为6.66 mmol/L、Fe^(2+)投加量为2 mmol/L、Na_(2)SO_(4)投加量为89.39 mmol/L的条件下,金橙G废水色度平均去除率为93.03%,COD平均去除率为85.80%。分析电协同Fe^(2+)活化过硫酸盐体系起主要作用的自由基及降解机理,证实了电和Fe^(2+)的协同作用。该研究可为电协同Fe^(2+)活化过硫酸盐体系在偶氮染料废水处理领域的应用提供技术支撑。Azo dye wastewater can cause great harm to the natural environment and human health.To study the electrosyner⁃gistic Fe^(2+)activated persulfate system for the efficient treatment of azo dye wastewater,using Golden Orange G wastewater as the treatment object,the effects of different reaction conditions such as pH,Fe^(2+)dosage,peroxodisulfate(PDS)dosage and current density on the treatment effect were investigated,and the Response Surface Method(RSM)was used to optimise the reaction conditions and to determine the treatment effect under the optimal reaction conditions.The results showed that under the conditions of pH 3,plate spacing of 9 cm,current density of 15 mA/cm^(2),PDS dosage of 6.66 mmol/L,Fe^(2+)dosage of 2 mmol/L,and Na_(2)SO_(4)dosage of 89.39 mmol/L,the average removal of Golden Orange G wastewater was 93.03%in terms of chromaticity,and the average removal of COD was 85.80%.The analysis of the free radicals and degradation mechanism that play a major role in the electrosynergistic Fe^(2+)activation of persulfate system confirmed the synergistic effect of electricity and Fe^(2+).This study provides technical support for the application of electrosynergistic Fe^(2+)activated persulfate system in the field of azo dye wastewater treatment.

关 键 词：过硫酸盐 金橙G废水 Fe^(2+)离子 响应曲面法 

分 类 号：X703[环境科学与工程—环境工程]