羟基乙叉二膦酸对Fe^(2+)活化O_(2)降解污染物的强化效果及机制  

Enhancement effect and mechanism of 1-Hydroxyethylidene-1,1-diphosphonic acid on Fe^(2+)activated O_(2) degrading pollutants

作　　者：茹金涛 王德玉 张成武[1,2,3] 李媛 刘柯阳[1,2,3] 秦传玉 RU Jin-tao;WANG De-yu;ZHANG Cheng-wu;LI Yuan;LIU Ke-yang;QIN Chuan-yu(Key Laboratory of Groundwater Resources and Environment,Ministry of Education,Jilin University,Changchun 130021,China;National and Local Joint Engineering Laboratory for Petrochemical Contaminated Site Control and Remediation Technology,Jilin University,Changchun 130021,China;Jilin Provincial Key Laboratory of Water Resources and Environment,Jilin University,Changchun 130021,China)

机构地区：[1]吉林大学,地下水资源与环境教育部重点实验室,吉林长春130021 [2]石油化工污染场地控制与修复技术国家地方联合工程实验室,吉林长春130021 [3]吉林省水资源与环境重点实验室,吉林长春130021

出　　处：《中国环境科学》2024年第6期3142-3150,共9页China Environmental Science

基　　金：吉林省科技发展计划项目(20230101132JC)。

摘　　要：羟基乙叉二膦酸(HEDP)常与Fe^(2+)形成Fe^(2+)-HEDP配合物,本文验证了HEDP存在可以促进Fe^(2+)活化分子氧产生活性自由基(ROS),研究结果显示添加2mmol/L HEDP后,Fe^(2+)/O_(2)体系中苯酚(10mg/L)的降解效果从0.69%提升到69.31%,在此过程中,体系中的HEDP还能够实现部分自降解.电子自旋共振(ESR)和掩蔽实验结果表明体系中主要ROS为HO^(•)和O_(2)^(•–),双电子传递途径(O_(2)→H_(2)O_(2)→HO^(•))是体系中产生HO^(•)的主要方式.在3.0~9.0的pH值范围内,HEDP都能够促进ROS的产生和污染物的降解,常见环境阴离子对体系影响较小.1-Hydroxyethylidene-1,1-diphosphonic acid(HEDP)often formed Fe^(2+)-HEDP complexes with Fe^(2+).In this study,HEDP was verified to promote the production of reactive oxygen species(ROS)from Fe^(2+)activated molecular oxygen.The results showed that after adding 2mmol/L of HEDP,the degradation effect of phenol(10mg/L)in the Fe^(2+)/O_(2)system increased from 0.69%to 69.31%.In the process,the HEDP in the system was partially self-degraded.The results of electron spin resonance(ESR)and quenching experiments indicated that the main ROS in the system were HO^(•)and O_(2)^(•-),and the two-electron transfer pathway(O_(2)→H_(2)O_(2)→HO^(•))was the main way to generate HO•.Within the pH range of 3.0~9.0,HEDP stimulated the generation of ROS and facilitated the degradation of pollutants.Besides,the presence of common environmental anions had minimal influence on the system.

关 键 词：羟基乙叉二膦酸 二价铁 分子氧活化 高级氧化 强化机制 

分 类 号：X703[环境科学与工程—环境工程]