不同UV光氧化工艺的阿特拉津降解动力学研究  

Study on Atrazine Degradation Kinetics with Different Ultraviolet Photo-oxidation Process

作　　者：刘玉灿 董金坤 苏苗苗 张岩[1] 李伟[2] 段晋明[2] LIU Yucan;DONG Jinkun;SU Miaomiao;ZHANG Yan;LI Wei;DUAN Jinming(School of Civil Engineering,Yantai University,Yantai 264005,China;School of Environmental&Municipal Engineering,Xi'an University of Architecture and Technology,Xi'an 710055,China)

机构地区：[1]烟台大学土木工程学院,山东烟台264005 [2]西安建筑科技大学环境与市政工程学院,陕西西安710055

出　　处：《水处理技术》2019年第12期57-64,共8页Technology of Water Treatment

基　　金：山东省自然科学基金项目（ZR2017BEE016）;国家自然科学基金项目（51609207）;国家自然科学基金项目（51308437）;烟台大学科技项目（TM17B19）

摘　　要：UV光照条件下,研究了反应条件对农药阿特拉津(ATZ)光氧化降解的影响规律与作用机理。结果表明,ATZ在不同UV光氧化工艺中的降解反应均符合准1级反应动力学,溶液pH对降解速率均存在较大影响。单独UV工艺中,ATZ在不同溶液pH下的降解速率、产物生成及形态差异,导致ATZ水溶液的紫外-可见(UV-Vis)吸收光谱存在一定差别。UV/H2O2工艺中,ATZ的降解速率随H2O2加入量的增加呈现先增大后降低的变化趋势,ATZ溶液在pH分别为7.0和10.0时的UV-Vis吸收光谱的变化趋势与幅度相似,但与pH为4.0时的差别较大。UV/Ti O2工艺中,ATZ的降解速率随Ti O2加入量的增加而降低;H2O2和Ti O2同时加入到反应体系时,ATZ降解速率均低于二者单独加入时的降解速率。The influence rules and mechanism of reaction conditions on atrazine(ATZ) photo-oxidative degradation under ultraviolet(UV) irradiation were investigated. The results indicated that, the degradation reaction of ATZ with different UV photo-oxidation process followed pseudo first-order degradation kinetics, and the pH of solution had great effect on the degradation rate. In sole-UV process, the difference of degradation rate, products generation and morphology of ATZ under different solution pH leaded to different UV-visible absorption spectra of ATZ aqueous solution. In UV/H2 O2 process, the degradation rates of ATZ firstly increased and then decreased with the increase of addition dosage of H2 O2. The change tendency and amplitude of the UV-visible absorption spectra of ATZ aqueous solution under the p H of 7.0 and 10.0 were similar, but very different with that of p H of 4.0. In UV/TiO2 process, the degradation rate of ATZ decreased with the increase of addition dosage of TiO2. The degradation rate of ATZ during UV/H2 O2/TiO2 process was lower than that during UV/H2 O2 and UV/TiO2 process.

关 键 词：阿特拉津 降解 UV UV/H2O2 UV/TIO2 UV/H2O2/TiO2 动力学 

分 类 号：TU991.2[建筑科学—市政工程]