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- W3161847944 abstract "The abuse and improper disposal of antibiotics including metronidazole (MNZ) result in serious contamination in aquatic environments. In this study, pyrite, which was not reactive for MNZ removal, was simply mixed with zero valent iron (ZVI) to efficiently remove MNZ in anaerobic aqueous solutions. A dual ZVI/pyrite system consisting of ZVI (1.0 g/L) and pyrite (4.0 g/L) removed MNZ completely in 360 min within a broad pH 0 range (5.0–9.0), and it still maintained a high removal efficiency (~80%) even at a high pH 0 of 10.0. By contrast, single ZVI (1.0 g/L) showed much lower efficiency (4.8%–22.0%) within the same pH 0 range (5.0–10.0). On investigating the mechanism of MNZ removal, the cooperation between ZVI and pyrite enhanced the surface corrosion of ZVI and facilitated the redox cycle of Fe(III)/Fe(II) to generate more sorbed Fe(II), which was a dominant reactive species for MNZ removal. Pyrite also activated the ZVI surface to form FeS@Fe in situ , accelerating the electron transfer from Fe 0 core to the surface-enriched MNZ, and stimulated the formation of green rust sulfate on the ZVI surface to further promote MNZ removal. LC-MS analysis confirmed ZVI/pyrite reductively transformed MNZ into readily biodegradable products by denitration and cleavage of hydroxyethyl." @default.
- W3161847944 created "2021-05-24" @default.
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- W3161847944 date "2021-10-01" @default.
- W3161847944 modified "2023-10-17" @default.
- W3161847944 title "Enhanced effect of pyrite on the removal of metronidazole by zero valent iron" @default.
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- W3161847944 doi "https://doi.org/10.1016/j.jcis.2021.05.093" @default.
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