Abstract：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.
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SANG Lin-feng, SU Shan-shan, GAO Zi-wei, JIN Wei, ZHAO Ya-ping. Photoassisted MIL-101(Fe) activated hydrogen peroxide system for oxidative degradation of roxarsone and adsorption of in-situ formed arsenate. CHINA ENVIRONMENTAL SCIENCECE, 2022, 42(1): 203-212.
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