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- W2981904927 abstract "Abstract Solar light driven organoarsenicals degradation and simultaneous inorganic arsenic immobilization with naturally abundant hematite is very promising for organoarsenicals remediation, but suffers from the fast electron-hole charge recombination of hematite. Herein, we report that oxalate, widely existed in soil and water environments, can greatly enhance the photocatalytic molecular oxygen activation of hematite to degrade a typical organoarsenical roxarsone and immobilize the resulted inorganic arsenic. It was found that oxalate could chelate with surface Fe(III) of hematite to generate plenty of •OH via a surface Fe(III)/Fe(II) cycle mediated oxygen molecular activation process under a simulated solar light, and thus induced 85.1% of roxarsone transformation into inorganic arsenic species, mainly As(V), within 6 h. The generated As(V) could be further adsorbed on hematite surface with prolonging the reaction time to 24 h in dark, avoiding secondary pollution. More importantly, hematite was reusable for the simulated solar light driven roxarsone degradation and As(V) immobilization in the presence of oxalate. This study offers a green and effective strategy for organoarsenicals remediation, and also sheds light on the environmental effects of iron oxides and oxalate." @default.
- W2981904927 created "2019-11-01" @default.
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- W2981904927 date "2020-03-01" @default.
- W2981904927 modified "2023-10-08" @default.
- W2981904927 title "Simulated solar light driven roxarsone degradation and arsenic immobilization with hematite and oxalate" @default.
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- W2981904927 doi "https://doi.org/10.1016/j.cej.2019.123254" @default.
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