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

作者：Sang L.-F.; Su S.-S.; Gao Z.-W.; Jin W.; Zhao Y.-P.^*

来源：China Environmental Science, 2022, 42(1): 203-212.

• Adsorption
• Fe-based metal-organic framework
• Hydrogen peroxide
• Roxarsone

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 H2O2 (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 O2?- 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.

• 单位
  华东师范大学; 同济大学