稀土改性TNTs/SnO_(2)-Sb电极电催化氧化深度处理煤化工废水  

Advanced treatment of coal chemical wastewater by electrocatalytic oxidation with rare earth modified TNTs/SnO_(2)-Sb electrode

作　　者：杨莉莎 郭颜铭 Yang Lisha;Guo Yanming(School of Environmental&Chemical Engineering,Heilongjiang University of Science&Technology,Harbin 150022,China)

机构地区：[1]黑龙江科技大学环境与化工学院,哈尔滨150022

出　　处：《黑龙江科技大学学报》2023年第6期829-834,共6页Journal of Heilongjiang University of Science And Technology

基　　金：国家自然科学基金项目(52000061)。

摘　　要：为研究稀土掺杂钛基二氧化锡纳米复合材料处理煤化工废水质量及效率的可行性和可靠性,将制备的稀土掺杂钛基二氧化锡纳米复合材料作为阳极,构建电催化氧化体系,探究其对煤化工企业二级出水的电化学深度处理效能,结合电极表面羟基自由基生成能力测试,分析电流密度及运行时间对体系深度处理效果的影响规律。结果表明:在一定的反应时间内,增加电流密度可促进羟基自由基的生成能力,提高了深度处理效能;在12.5 mA/cm^(2)的电流密度下反应时间为4 h后,二级出水中的有机物含量大幅减少,总酚、COD、TOC及TN的去除效率分别为100%、75.82%、55.8%及78.2%,且出水COD浓度满足企业回用需求。This paper is an attempt to confirm the feasibility and reliability of rare earth doped titanium-based tin dioxide nanocomposite in the quality and efficiency of coal chemical wastewater treatment.The study involves taking the prepared nanocomposite of titanium-based tin dioxide doped with rare earth as an anode to construct an electrocatalytic oxidation system;investigating its electrochemical advanced treatment efficiency for the secondary effluent from coal chemical enterprises;and combined with the test of hydroxyl radical generation ability on the electrode surface,analyzing the influence law behind current density and running time on the advanced treatment effect of the system.The results show that within acertainn time,increasing the current density can promote the generation ability of hydroxyl radical,and improve the efficiency of advanced treatment.Under the current density of 12.5 mA/cm^(2) for 4 h,the content of organic matter in the secondary effluent is greatly reduced,and the removal efficiencies of total phenol,COD,TOC and TN are 100%,75.82%,55.8% and 78.2%,respectively,and the COD concentration in the effluent meets the reuse requirements of the enterprise.

关 键 词：煤化工废水 深度处理 电催化氧化体系 纳米复合电极 羟基自由基 

分 类 号：X703.1[环境科学与工程—环境工程]