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Activation of peroxydisulfate via BiCoFe-layered double hydroxide for effective degradation of aniline

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Abstract

The sulfate radical-based advanced oxidation processes (SR-AOPs) is a promising method for the degradation of pollutants, with the development of highly efficient catalysts for persulfate activation has been widely concerned. The novel BiCoFe-LDH (BCF-x) was synthesized successfully by coprecipitation method, which can activate peroxydisulfate (PDS) efficiently to degrade aniline. Comparative analysis with pure CoFe-LDH revealed a remarkable increase in reaction rate constant by approximately 14.66 times; the degradation rate of aniline (10 mg/L) was 100% in 60 min with the condition of 0.5 g/L BCF-1.5 and 0.5 g/L PDS, due to BCF-1.5 which was characterized as a complex of CoFe-LDH and Bi2O2CO3, promoting electron transport to improve the efficiency of activated PDS. In the reaction system, SO4•−, ·OH, and 1O2 were responsible for the aniline degradation and ·OH was the primary one. Furthermore, this work proposes a reaction electron transfer catalytic mechanism, which provided a new insight and good application prospect for efficient activation of PDS for pollutant degradation.

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All the data generated or analyzed during this study are included in this published article.

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Funding

This work was supported by the financial supports from the National Nature Science Foundation of China (Z20230005).

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Contributions

All authors contributed to the study conception and design. Yutong Li analyzed and interpreted the data and was a major contributor in writing the manuscript. Buying Qi performed writing—review and editing, validation, and supervision. Xinglong Jin performed supervision, conceptualization, writing—review and editing, project administration, and funding acquisition. All authors read and approved the final manuscript.

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Correspondence to Xinglong Jin.

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Highlights

• The BiCoFe-LDH showed excellent PDS activation properties for aniline removal.

• The Bi2O2CO3 serves as an electron transfer mediator to promote Co2+/Co3+ and Fe2+/Fe3+ cycles.

• SO4•−, ·OH, and 1O2 play a significant role in the degradation of aniline.

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Li, Y., Jin, X. & Qi, B. Activation of peroxydisulfate via BiCoFe-layered double hydroxide for effective degradation of aniline. Environ Sci Pollut Res 31, 23979–23994 (2024). https://doi.org/10.1007/s11356-024-32735-x

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  • DOI: https://doi.org/10.1007/s11356-024-32735-x

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