摘要
系统考察了Fe_(3)O_(4)/rGO复合材料催化臭氧和过硫酸盐降解磺胺嘧啶的效能与机制。研究发现两种高级氧化体系中GO与Fe_(3)O_(4)质量占比为15%的催化剂(Fe_(3)O_(4)/rGO_(15wt%))对SDZ的降解效率最佳,并观察到Fe_(3)O_(4)和GO之间在对O_(3)和PS催化中的协同作用。同时,研究了水环境共存阴离子(Cl^(-),SO_(4)^(2-)和NO_(3)^(-))对SDZ降解效果的影响。通过淬灭实验明确了该催化剂在O_(3)体系中SDZ降解中的活性氧化物种,既羟基自由基(‧OH),超氧自由基(O_(2)·^(-))和单线态氧(^(1)O_(2))。在PS体系中,活性氧化物种为硫酸根自由基(SO_(4)·^(-))和^(1)O_(2)。通过实际水环境的模拟实验和稳定性实验发现,与PS体系相比,该催化剂在O_(3)体系对含SDZ的水体表现出较强的降解效能与更稳定的特性。
In this study,the Fe_(3)O_(4)/rGO composite material has systematically investigated the efficiency and mechanism of catalyzing O_(3) and PS degradation of SDZ.The study found that the catalyst with a mass ratio of Fe_(3)O_(4) to GO of 15% in the two AOPs had the best degradation efficiency for SDZ,and the synergy between Fe_(3)O_(4) and GO in the catalysis of O_(3) and PS was observed.At the same time,the effect of coexisting anions(Cl^(-),SO_(4)^(2-) and NO_(3)^(-))in the water environment on the degradation of SDZ was studied.The quenching experiment clarified the active oxide species of the catalyst in the degradation of SDZ in the O_(3) system,including hydroxyl radicals(·OH),superoxide radicals(O_(2)·^(-))and singlet oxygen(^(1)O_(2)).In the PS system,the active oxide species are sulfate radical(SO_(4)·^(-))and ^(1)O_(2).Through the simulation experiment and stability experiment of the actual water environment,it is found that compared with the PS system,the catalyst exhibits stronger degradation efficiency and more stable characteristics in the water body containing SDZ in the O_(3) system.
作者
侯云英
吕诗峰
李硕
郑禾山
HOU Yun-ying;LV Shi-feng;LI Shuo;ZHENG He-shan(College of Chemistry and Chemical Engineering,Qiqihar University,Heilongjiang Qiqihar 161006,China)
出处
《齐齐哈尔大学学报（自然科学版）》
2022年第1期62-68,共7页
Journal of Qiqihar University(Natural Science Edition)
基金
国家自然科学基金(21906088)
黑龙江省自然科学基金项目(LH2020B023)
黑龙江省普通本科高等学校青年创新人才培养计划资助项目(UNPYSCT-2020067)
黑龙江省省属高等学校基本科研业务费科研项目(135309338)
植物性食品加工技术黑龙江省优势特色学科专项(YSTSXK201856)
黑龙江省大学生创新创业训练计划项目(202010232048)。
