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- W3182022803 abstract "• A type of EF-Na 2 MoO 4 system without addition of oxidant was developed. • CBZ is effectively degraded and the production of iron sludge is greatly reduced. • The utilization rate of iron was greatly improved by the slow release of iron ions. • EF-Na 2 MoO 4 system is mainly a radical pathway dominated by O 2 − . In this study, the removal efficiency of carbamazepine (CBZ) was significantly improved in an electro-Fenton system without any extra oxidant (e.g., O 2 or H 2 O 2 ) in the presence of sodium molybdate (EF-Na 2 MoO 4 system). The slow release of iron ions of EF-Na 2 MoO 4 system greatly reduced the generation of iron sludge and effectively promoted the utilization of iron ions. The pseudo-first-order rate constants ( k obs ) for CBZ removal by EF-Na 2 MoO 4 process (0.0417 min −1 ) was much higher than those of sole electrolysis (0.0007 min −1 ) and EF-Na 2 SO 4 systems (0.0044 min −1 ). Meanwhile, the total iron concentration in EF-Na 2 MoO 4 process was 4.93 mg/L for 60 min, which was extremely lower than that of EF-Na 2 SO 4 process (271.22 mg/L). Besides, the primary reactive species was proposed to be superoxide radical (O 2 − ), while hydroxyl radical ( OH) and MoO 2 (O 2 ) 2 2− acted as the secondary reactive species. Our work elucidated the possible mechanism that the slow release of iron ions promotes pollutants degradation." @default.
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- W3182022803 date "2021-12-01" @default.
- W3182022803 modified "2023-10-16" @default.
- W3182022803 title "Efficient degradation of carbamazepine by electro-Fenton system without any extra oxidant in the presence of molybdate: The role of slow release of iron ions" @default.
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- W3182022803 doi "https://doi.org/10.1016/j.apcatb.2021.120506" @default.
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