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• W4309337914 endingPage "108972" @default.
• W4309337914 startingPage "108972" @default.
• W4309337914 abstract "Developing heterogeneous catalysts with dispersed single-atom sites is highly desirable to enhance peroxymonosulfate (PMS) activation for pollutant degradation. Herein, a novel PMS activation catalyst, single-atom Co anchored on sulfhydryl decorated UiO-66 (Zr-MSA-Co), was synthesized via the strong coordination between Co and sulfhydryl. The batch and fixed-bed column degradation of norfloxacin (NOR) in Zr-MSA-Co/PMS system showed that the Zr-MSA-Co/PMS system could degrade NOR effectively. Moreover, the degradation performance of the Zr-MSA-Co/PMS system for NOR could be enhanced in the presence of anions (except NO 3 - ) and in complex waters. Particularly, the NOR removal efficiency in secondary wastewater by the fixed-bed reactor could reach 99% within 26 h. The radical quenching experiment and electron paramagnetic resonance confirmed that SO 4 • - , •O 2 - and 1 O 2 were the major reactive oxygen groups. Three plausible NOR degradation pathways (defluorination, piperazine ring opening and decarboxylation) were occurred. Density functional theory (DFT) calculations indicated that S-Co-S was the active site for PMS adsorption and activation. Toxicity evaluation results suggested that the antibacterial effect of the intermediates after degradation was reduced significantly. This work provides a new and green approach to anchor single-atom sites on the exposed termination of metal-organic frameworks for catalytic activation of PMS to degrade pollutants. • Sulfydryl decorated UiO-66 was obtained by using mercaptosuccinic acid as ligands • Co atom anchored on sulfydryl decorated UiO-66 via the strong coordination • The norfloxacin removal efficiency by the fixed-bed reactor was 99% within 26 h • S-Co-S was the active site for peroxymonosulfate adsorption and activation • Degradation pathway and intermediates’ ecotoxicity prediction were presented" @default.
• W4309337914 created "2022-11-26" @default.
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• W4309337914 date "2023-02-01" @default.
• W4309337914 modified "2023-10-15" @default.
• W4309337914 title "Cobalt atom sites anchored on sulfhydryl decorated UiO-66 to activate peroxymonosulfate for norfloxacin degradation" @default.
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• W4309337914 doi "https://doi.org/10.1016/j.jece.2022.108972" @default.
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