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- W3037923308 abstract "For water treatment/remediation by zerovalent iron (ZVI), of particular concern is its selectivity toward contaminants over natural non-targets (e.g., O2 and H2O/H+). Hence, the effects of weak magnetic field (WMF) on the selectivity of ZVI toward metalloid oxyanions (i.e., As(III), As(V), Sb(III), Sb(V), Se(IV) and Se(VI)) were in-depth investigated under aerobic conditions. This study unraveled that, despite the electron utilization (EU) of ZVI with and without WMF were almost identical at reaction equilibrium, the application of a WMF could enhance the specific removal capacity (SRC) of ZVI toward metalloid oxyanions from 1.8–19.0 mg/g Fe to 12.6–85.3 mg/g Fe. Particularly, the electron efficiency (EE) of ZVI with WMF for reduction of Se(IV)/Se(VI) were 3.7- to 14.1-fold greater than that without WMF. Since the WMF-induced magnetic gradient force (FΔB) can derive the movement of both Fe2+ and metalloid oxyanions, the subsequent incorporation of metalloid oxyanions with in-situ generated iron oxides can also been mediated synchronously and thus leading to an enhanced SRC of ZVI (also EE for Se(IV) and Se(VI) reduction by ZVI). In general, our findings prove that WMF should be a promising method to promote the selectivity of ZVI for water decontamination under aerobic conditions." @default.
- W3037923308 created "2020-07-02" @default.
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- W3037923308 date "2020-12-01" @default.
- W3037923308 modified "2023-10-09" @default.
- W3037923308 title "Weak magnetic field enables high selectivity of zerovalent iron toward metalloid oxyanions under aerobic conditions" @default.
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- W3037923308 doi "https://doi.org/10.1016/j.jhazmat.2020.123330" @default.
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