Mg-Al层状双金属氧化物催化臭氧降解阿特拉津的性能研究  

Investigation of performance of ozone catalyzed by Mg-Al layered bimetallic oxides for degradation of atrazine

作　　者：李尚坤 李彦刚 孙磊 袁向娟 夏东升[2,3] LI Shangkun;LI Yangang;SUN Lei;YUAN Xiangjuan;XIA Dongsheng(Research and Development Center of Beijing Drainage Group Technology,Beijing 100022,China;School of Environmental Engineering,Wuhan Textile University,Wuhan 430200,China;Engineering Research Center for Clean Production of Textile Dyeing and Printing,Ministry of Education,Wuhan Textile University,Wuhan 430200,China)

机构地区：[1]北京城市排水集团科技研发中心,北京100022 [2]武汉纺织大学环境工程学院,武汉430200 [3]武汉纺织大学纺织印染清洁生产教育部工程中心,武汉430200

出　　处：《工业用水与废水》2023年第4期54-59,共6页Industrial Water & Wastewater

基　　金：国家自然科学基金青年项目(51808412)。

摘　　要：采用水热沉淀-煅烧法在煅烧温度为400℃和Mg与Al物质的量比为3时制得Mg_(3)Al-400复合材料,通过SEM、FT-IR和XPS等分析Mg_(3)Al-400复合材料的形貌结构和理化组成,考察运行参数对其催化臭氧降解阿特拉津(ATZ)的影响。结果表明:Mg_(3)Al-400具有优异的催化臭氧降解ATZ性能,当其投加量为350 mg/L,ATZ质量浓度为5 mg/L,溶液初始pH值为6时,反应3 min后ATZ的去除率高达99%。此外,Mg_(3)Al-400在5次循环后仍具有较好的稳定性。自由基抑制试验表明·O_(2)-和·OH对ATZ的降解起到关键作用。对降解过程和反应机理分析可知,表面Mg—OH是其发挥催化作用的活性位点。Mg_(3)Al-400 composite material was synthesized by hydrothermal sedimentation-calcination under condition that the calcinations temperature was 400℃and the mass ratio of Mg to Al was 3,its morphology structure and physicochemical composition were analyzed through SEM,FT-IR and XPS,meanwhile,the influence of various factors on catalytic ozonation degradation of ATZ was investigated.The results showed that,Mg_(3)Al-400 had excellent catalytic performance for ozone degradation of ATZ,when the dosage was 350 mg/L,the mass concentration of ATZ was 5 mg/L,the initial pH value of the solution was 6,the reaction time was 3 min,the removal rate of ATZ reached 99%.Mg_(3)Al-400 showed good stability for pollutants removal over five reaction cycles,the free radical inhibition test demonstrated that·O_(2)-and·OH played a key role on ATZ degradation.Through the analysis on the mechanism of the reaction and the degradation process,it can be found that Mg—OH on the surface of Mg_(3)Al-400 was the active site to play the catalytic role.

关 键 词：臭氧 层状双金属氢氧化物 双金属氧化物 催化剂 阿特拉津 

分 类 号：X703.1[环境科学与工程—环境工程]