基于铌基BDD电极的含酚废水降解  

Degradation of Phenol-Containing Wastewater by Nb-Based BDD Electrode

作　　者：张敬贤 王博 袁俊 赵利民 宋永一 ZHANG Jingxian;WANG Bo;YUAN Jun;ZHAO Limin;SONG Yongyi(Sinopec Dalian Research Institute of Petroleum and Petrochemicals Co.,Ltd.,Dalian Liaoning 116045,China)

机构地区：[1]中石化(大连)石油化工研究院有限公司,辽宁大连116045

出　　处：《当代化工》2024年第12期2925-2930,共6页Contemporary Chemical Industry

基　　金：中国石化重点科技项目(项目编号:院控-142306)。

摘　　要：基于掺硼金刚石(BDD)电极的电化学高级氧化工艺是处理工业有机废水最有前景的技术之一。研究了铌基BDD电极(Nb/BDD)的物理和电化学本征性能,并以其为阳极考察了不同电流密度对苯酚的降解效果和较优电流密度下对某石化厂炼焦废水的处理情况。结果表明:Nb/BDD具有1.78V的高析氧电位、3.34V的宽电化学势窗口、0.21 mA的低背景电流和3.25 cm^(2)的较高电化学活性面积;随电流密度升高,苯酚去除率和表观反应速率常数也升高,在100mA·cm^(-2)下苯酚去除率最高为93.52%,表观反应速率常数为0.43745h^(-1);在较优的80 mA·cm^(-2)电流密度下电解10 h后,炼焦废水的COD去除率为69.78%,能耗仅为0.038 kW·h·g^(-1)。Electrochemical advanced oxidation process based on boron-doped diamond(BDD)electrode is one of the most promising technologies for the treatment of industrial organic wastewater.The physical and electrochemical properties of Nb-based BDD electrode(Nb/BDD)were studied,and the degradation effect of phenol with different current densities and the treatment of coking wastewater in a petrochemical plant were investigated with Nb/BDD as anode.The results indicated that Nb/BDD had a high oxygen evolution potential of 1.78 V,a wide electrochemical potential window of 3.34 V,a low background current of 0.21 mA and a high electrochemical active area of 3.25 cm^(2).The phenol removal rate and apparent reaction rate constant increased with the increase of current density.The highest-1 phenol removal rate was 93.52%and the apparent reaction rate constant was 0.43745 h at 100 mA·cm^(-2).After-2 electrolysis at the optimal current density of 80 mA·cm for 10 h,the COD removal rate of coking wastewater was 69.78%,and the energy consumption was only 0.038 kW·h·g^(-1).

关 键 词：掺硼金刚石 苯酚降解 电流密度 炼焦废水 电化学氧化 反应动力学 复合材料 扩散 

分 类 号：TQ085[化学工程] X703[环境科学与工程—环境工程]