光助MIL-101(Fe)活化过氧化氢氧化洛克沙胂及同步吸附生成的砷酸根  

Photoassisted MIL-101(Fe)activated hydrogen peroxide system for oxidative degradation of roxarsone and adsorption of in-situ formed arsenate

作　　者：桑林凤 苏珊珊 高紫崴 金伟[2] 赵雅萍[1] SANG Lin-feng;SU Shan-shan;GAO Zi-wei;JIN Wei;ZHAO Ya-ping(Faculty of Ecological and Environmental Sciences,East China Normal University,Shanghai 200241,China;School of Environmental Science and Engineering,Tongji University,Shanghai 200071,China)

机构地区：[1]华东师范大学生态与环境科学学院,上海200041 [2]同济大学环境科学与工程学院,上海200071

出　　处：《中国环境科学》2022年第1期203-212,共10页China Environmental Science

基　　金：国家自然科学基金资助项目(21377039)。

摘　　要：采用铁基金属有机框架(MIL-101(Fe))在模拟太阳光下活化过氧化氢氧化降解ROX—吸附去除生成的砷酸根.结果表明,光助MIL-101(Fe)(250mg/L)活化氧化剂H_(2)O_(2)(1.0mmol/L)体系可在120min内实现95.27%的ROX去除率,反应过程中形成的无机砷酸盐(As(V))会吸附在MIL-101(Fe)的表面,最终从溶液中实现84.14%的总砷去除率,主要活性氧形态·OH和O_(2)^(·-)自由基攻击ROX的As-C键,生成As(V)和邻硝基苯酚,环境实际水体基质对ROX在该系统中的去除有显著促进提升作用.An iron-based-organic framework(MIL-101(Fe))was prepared using a simple one-pot method,aiming to simultaneously oxidize ROX through activating hydrogen peroxide and adsorption formed arsenate under simulated sunlight.The photoassisted MIL-101(Fe)(250mg/L)activating H_(2)O_(2)(1.0mmol/L)system could remove 95.27% of ROX within 120min.Moreover,the arsenate(As(V))formed in this system could be adsorbed onto the surface of MIL-101(Fe)with 84.14% of the total arsenic removal ratio.The main formed reactive oxygen species·OH and O_(2)^(·-)free radicals,attacked the As-C bond of ROX,generated As(V)and o-nitrophenol compounds and accelerated the removal process.The actual environment water matrix significantly promoted the removal ratio of ROX in this system.

关 键 词：洛克沙胂 铁基金属有机框架 过氧化氢 吸附 

分 类 号：X52[环境科学与工程—环境工程]