不同光源UV/H_(2)O_(2)工艺降解四环素动力学  

Degradation kinetics of tetracycline by UV/H_(2)O_(2) process with various light sources

作　　者：胡晋博 李梦凯[2,4] 蔡恒文 严群 连军锋[1] 李文涛 强志民[2,3] HU Jinbo;LI Mengkai;CAI Hengwen;YAN Qun;LIAN Junfeng;LI Wentao;QIANG Zhimin(School of Civil and Surveying&Mapping Engineering,Jiangxi University of Science and Technology,Ganzhou 341000,China;Key Laboratory of Drinking Water Science and Technology,Research Center for Eco-Environmental Sciences,Beijing 100085,China;Ganzhou Innovation Center for Water Quality Security Technology at Ganjiang River Basin,Jiangxi University of Science and Technology,Ganzhou 341000,China;University of Chinese Academy of Sciences,Beijing 100049,China;School of Pre-School Education,Yuzhang Normal University,Nanchang 330103,China)

机构地区：[1]江西理工大学土木与测绘工程学院,赣州341000 [2]中国科学院生态环境研究中心,饮用水科学与技术重点实验室,北京100085 [3]江西理工大学,赣州市赣江流域水质安全保障技术创新中心,赣州341000 [4]中国科学院大学,北京100049 [5]豫章师范学院学前教育学院,南昌330103

出　　处：《环境工程学报》2021年第8期2618-2626,共9页Chinese Journal of Environmental Engineering

基　　金：国家重点研发计划(2019YFD1100100);国家自然科学基金资助项目(51878653)。

摘　　要：光源选择对于基于紫外(UV)的高级氧化工艺(UV-AOPs)十分重要。通过细管流光反应系统(MFPS)对比了低压UV(LPUV)汞灯、中压UV(MPUV)汞灯及真空UV/UV(VUV/UV)汞灯3种UV光源下UV/H_(2)O_(2)工艺对四环素(TC)的降解动力学,并建立了降解动力学模型。结果表明,VUV/UV光源对TC(0.1 mg·L^(-1)和5.0 mg·L^(-1))的光降解速率常数明显大于LPUV与MPUV光源。随着初始投加H_(2)O_(2)浓度的增大,LPUV/H_(2)O_(2)和MPUV/H2O2对TC(0.1 mg·L^(-1)和5.0 mg·L^(-1))的降解速率常数快速增大。然而,VUV/UV/H_(2)O_(2)对低质量浓度TC(0.1 mg·L^(-1))的降解速率常数随H2O2浓度的增大逐渐降低,对高质量浓度TC(5.0 mg·L^(-1))的降解速率常数逐渐增大。实验结果与降解动力学模型模拟相符。在实际UV-AOPs光源选择中,单纯降解动力学对比具有测试结果准确性高、费用低等优势,但存在无法考虑灯效、氧化剂费用等缺点,因此,还应结合中试实验的能耗对比综合考虑。Light source selection is important for ultraviolet(UV) based advanced oxidation processes(UVAOPs). Through the mini-fluidic photoreaction system(MFPS), the degradation kinetics of tetracycline(TC) by UV/H_(2)O_(2) process with three different UV light sources including low pressure UV(LPUV) mercury lamp,medium pressure UV(MPUV) mercury lamp and vacuum UV/UV(VUV/UV) mercury lamp were compared,and a degradation kinetic model was established. The results indicated that the degradation rate constants of TC(0.1 mg·L^(-1) and 5.0 mg·L^(-1)) by VUV/UV/H_(2)O_(2) were significantly higher than those by MPUV/H_(2)O_(2) and LPUV/H_(2)O_(2). With the increase of initial H_(2)O_(2) concentration, the degradation rate constants of TC(0.1 mg·L^(-1) and 5.0 mg·L^(-1)) by LPUV/H_(2)O_(2) and MPUV/H_(2)O_(2) increased rapidly. However, the degradation rate constant of low-concentration TC(0.1 mg·L^(-1)) by VUV/UV/H_(2)O_(2) decreased, and that of high-concentration TC(5.0 mg·L^(-1))increased. The experimental and modeled results agreed with each other. For the light source selection in practical, the degradation kinetics comparison had the advantages of high accuracy and low cost, and the disadvantages such as the neglect of lamp efficiency and oxidant cost. Therefore, it should also consider the energy consumption comparison results in pilot tests.

关 键 词：细管流光反应系统 四环素 UV光源 动力学模型 UV/H_(2)O_(2)工艺 

分 类 号：X703.1[环境科学与工程—环境工程]