脉冲光-电协同去除含盐废水中有机污染物的研究  

Removal of organic pollutants from saline wastewater by intense pulsed light(IPL)-electro reactor

作　　者：周雨珺 吉庆华 古振澳 李健生[1] ZHOU Yujun;JI Qinghua;GU Zhe'nao;LI Jiansheng(School of Environmental and Biological Engineering,Nanjing University of Science and Technology,Nanjing 210094,China;School of Environment,Tsinghua University,Beijing 100084,China;Key Laboratory of Drinking Water Science and Technology,Research Center for Eco-Environmental Sciences,Chinese Academy of Sciences,Beijing 100085,China)

机构地区：[1]南京理工大学环境与生物工程学院,南京210094 [2]清华大学环境学院,清华大学水质与水生态研究中心,北京100084 [3]中国科学院生态环境研究中心,北京100085

出　　处：《环境工程学报》2025年第2期354-363,共10页Chinese Journal of Environmental Engineering

基　　金：国家自然科学基金资助项目(52200098)。

摘　　要：工业废水中本身往往含有大量的氯离子,可以在光电化学催化氧化下形成强氧化性的氯活性物种,达到净水目的。为了改进含盐废水中有机污染物在实际处理中传质效率低、光穿透性差导致的光利用效率低等问题,本研究开发了脉冲光电协同的穿透式电极反应器,并分析了其对有机污染物4-硝基酚的降解性能。研究通过脉冲光源和相同功率的常规紫外光源对比发现,强脉冲光协同电氧化对4-硝基酚的降解效率和矿化效率更高;在3 V电压协同脉冲光源,19~24 min的停留时间下,单次穿透出水可降解90%以上。反应器运行的最佳参数为脉冲光协同2 V电压,50 mmol·L^(-1)的氯化钠浓度和19 min的水力停留时间。溶液的pH、氯离子浓度、停留时间和外加电压都会直接影响4-硝基酚的降解效能。在光电协同下,大量氯活性物质产生,对4-硝基酚降解起到了主导作用。此研究结果为含盐废水中有机污染物的去除提供了新的解决方案。Industrial wastewater often contains a large number of chloride ions,which can form strong oxidizing reactive chlorine species(RCS)under photo-electric catalytic process for wastewater purification.In order to improve the shortcomings such as low mass transfer efficiency and poor light penetration in the practical wastewater treatment of saline organic wastewater,this study developed an intense pulsed light coupled with flow-through electrode and analyzed its degradation performance of organic pollutants 4-nitrophenol.By comparing the light source with the conventional ultraviolet light source of the same power,it was found that the degradation efficiency and mineralization efficiency of 4-nitrophenol were higher than that of intense pulse light.Under the 3 V voltage cooperative pulse light source,19~24 min hydraulic retention time(HRT),4-nitrophenol removal efficiency could reach up to 90%in single pass The optimum parameters for reactor operation were intense pulsed light with 2 V voltage,50 mmol·L^(-1) sodium chloride concentration and HRT of 19 min.The solution pH,chloride ion concentration,HRT and applied voltage could directly affect the degradation efficiency of 4-nitrophenol.Under the photo-electric synergistic effect,reactive chlorine species were greatly produced which played a major role in the degradation of 4-nitrophenol.The results of this study provide a new solution for the removal of organic pollutants in saline wastewater.

关 键 词：光电协同 脉冲光 氯活性物质 穿透式电极 

分 类 号：X703[环境科学与工程—环境工程]