摘要
本研究系统分析了UV/Ti/PbO_(2)光电协同催化体系对磺胺甲恶唑(SMX)的降解效能及环境安全性。结果表明,该体系通过光电协同效应显著提升降解效率,120 min内SMX去除率达到90%以上,矿化率达到70%,反应速率常数远超单一催化体系。同时,揭示SMX降解遵循异恶唑环开环→磺酰胺键断裂→芳香环羟基化→小分子酸化的多步路径。毒性评估显示,SMX在急性和慢性毒性模型中均表现出最高风险,而降解过程中毒性呈现下降趋势。EPR实验证实·OH和^(1)O_(2)是主导活性物种,二者通过氧化反应有效破坏SMX的异恶唑环和磺酰胺键。该技术整体展现出环境友好性,为水处理提供了兼具高效性与生态安全性的解决方案。
This study systematically analyzed the degradation efficiency and environmental safety of the sul-famethoxazole(SMX)by the UV/Ti/PbO2 photoelectric synergistic catalytic system.The results demonstrate that this system significantly enhances degradation efficiency through photoelectric synergy,achieving over 90%SMX removal within 120 minutes,with a mineralization rate of 70%,and the reaction rate constant far exceeds that of single catalytic systems.Meanwhile,the study reveals that the SMX degradation follows a multi-step pathway:isoxazole ring opening→sulfonamide bond cleavagearomatic ring hydroxylationsmall-molecule acidification.Toxicity assessments indicate that SMX exhibits the highest risk in both acute and chronic toxicity models,while its toxicity shows a declining trend during degradation.EPR experiments confirm that·OH and ^(1)O_(2) are the domi-nant active species,which effectively disrupt the isoxazole ring and sulfonamide bond of SMX through oxidation reactions.This technology demonstrates environmental friendliness,providing a water treatment solution that combines high efficiency with ecological safety.
作者
李思文
刘根
赵俊杰
石春燕
林英姿
LI Siwen;LIU Gen;ZHAO Junjie;SHI Chunyan;LIN Yingzi(Key Laboratory of Songliao Aquatic Environment,Ministry of Education,Jilin Jianzhu University,Changchun Jilin 130118,China;School of Municipal and Environmental Engineering,Jilin Jianzhu University,Changchun Jilin 130118,China;Jilin Province Key Laboratory of Water Pollution Control and Resource Reuse,Jilin Jianzhu University,Changchun Jilin130118,China;Jilin Province Key Laboratory of Drinking Water Testing and Purification Technology,Jilin Jianzhu University,Changchun Jilin130118,China)
出处
《北方建筑》
2025年第3期68-73,共6页
Northern Architecture
基金
吉林省科技厅科技发展计划项目(20220203047SF)。
关键词
联用技术
羟基自由基
降解路径
combined technology
hydroxyl radical
degradation pathway
