Heterogeneous Fe(III)/Fe(II) circulation in FeVO4 by coupling with dithionite towards long-lasting peroxymonosulfate activation: Pivotal role of vanadium as electron shuttles
Leiduo Lai , Peng Zhou , Hongyu Zhou , Minglu Sun , Yue Yuan , Yang Liu , Gang Yao , Bo Lai
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引用次数: 39
Abstract
Coupling dithionite (DNT) with FeVO4 induced PMS activation (FeVO4/PMS/DNT) effectuates fast heterogeneous Fe(III) reduction to generate multitudinous reactive oxygen species (ROS) for fast degradation of carbamazepine (2.5 mg/L, >90 % degradation efficiency within 300 s) in batch mode. The Fe(III)/Fe(II) circulation propelled by DNT and reduced V species experiences two stages. DNT induces SO2− generation, which is a highly active species with strong reducibility for Fe and V reduction. The reduced V species donate electrons to ≡Fe(III) via Fe-O-V bond rather than directly react with PMS, implying introducing polyvalent V to modulate Fe-based materials intensifies DNT utilization and alleviates ROS quenching effects. Moreover, FeVO4 crystalline form regains after reaction, and FeVO4/PMS/DNT system has an excellent reutilization and strong resistance to natural waters. Our discovery sheds new light on acceleration of heterogenous Fe(III)/Fe(II) circulation to promote Fenton-like oxidation, it may be a long-lasting strategy for water remediation.
期刊介绍：
Applied Catalysis B: Environment and Energy (formerly Applied Catalysis B: Environmental) is a journal that focuses on the transition towards cleaner and more sustainable energy sources. The journal's publications cover a wide range of topics, including:
1.Catalytic elimination of environmental pollutants such as nitrogen oxides, carbon monoxide, sulfur compounds, chlorinated and other organic compounds, and soot emitted from stationary or mobile sources.
2.Basic understanding of catalysts used in environmental pollution abatement, particularly in industrial processes.
3.All aspects of preparation, characterization, activation, deactivation, and regeneration of novel and commercially applicable environmental catalysts.
4.New catalytic routes and processes for the production of clean energy, such as hydrogen generation via catalytic fuel processing, and new catalysts and electrocatalysts for fuel cells.
5.Catalytic reactions that convert wastes into useful products.
6.Clean manufacturing techniques that replace toxic chemicals with environmentally friendly catalysts.
7.Scientific aspects of photocatalytic processes and a basic understanding of photocatalysts as applied to environmental problems.
8.New catalytic combustion technologies and catalysts.
9.New catalytic non-enzymatic transformations of biomass components.
The journal is abstracted and indexed in API Abstracts, Research Alert, Chemical Abstracts, Web of Science, Theoretical Chemical Engineering Abstracts, Engineering, Technology & Applied Sciences, and others.
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