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- W3040849158 abstract "As the industries advances at a fast pace, efficient and simultaneous removal of both heavy metals and organics from aqueous is essential to protecting public human health and environment. In this work, we used pyrite as reductant and catalyst for simultaneously reducing Cr(VI) and activating persulfate (PS) to degrade acid orange 7 (AO7). The results indicated that the simultaneous removal rate of AO7 and Cr(VI) by pyrite-PS was up to 100% within 60 min under acidic conditions. However, There was a competitive relationship between PS activation and Cr(VI) reduction for robbing Fe2+. At beginning of the reaction, the limited Fe2+ firstly activated persulfate rather than reduce Cr(VI). The effect of dosage of pyrite and PS on Cr(VI) reduction was more significant than that on AO7 degradation. Increased pyrite dosages from 1g·L−1 to 6 g L−1 resulted in enhanced Cr(VI) removal, and excessive PS (more than 0.4 g L−1) was not beneficial to Cr(VI) removal. Electron paramagnetic resonance (EPR) spectroscopy and radical scavenger studies demonstrated that sulfate (SO4−·), singlet oxygen (1O2) and superoxide radical (·O2−) were the crucial reactive oxygen species (ROS) in the pyrite-PS system rather than hydroxyl radical (·OH). This study showed that the pyrite-PS system could simultaneously remove AO7 and Cr(VI), which provided a new idea for the actual wastewater treatment." @default.
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- W3040849158 date "2020-10-01" @default.
- W3040849158 modified "2023-10-17" @default.
- W3040849158 title "Simultaneous removal of Cr(VI) and acid orange 7 from water in pyrite-persulfate system" @default.
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- W3040849158 doi "https://doi.org/10.1016/j.envres.2020.109876" @default.
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