Abstract
A magnetic composite of CoFe2O4 and carbon nanotube (CNT) was prepared using the solvothermal approach and then employed for the activation of peroxydisulfate (PDS) to degrade reactive black 5 (RB5) and other organic pollutants. Characterization results of the composite catalyst revealed the successful loading of spherical CoFe2O4 particles on CNTs, possessing abundant porosity as well as magnetic separation capability. Under the degradation conditions of 0.2 g/L CoFe2O4-CNT dosage and 4 mM PDS dosage, the removal efficiencies of 10 mg/L RB5 and other pollutants were in the range of 94.5 to ~ 100%. The effects of pH, co-existing ions/humic acid, and water matrices as well as the reusability of the catalyst were also investigated in detail. Furthermore, the degradation mechanism and pathway were proposed based on quenching experiments, LC–MS analysis, and density functional theory (DFT) calculations, and the toxicity of the degradation products was evaluated in the quantitative structure–activity relationship approach.
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Funding
This work is financially supported by the Joint Research Fund Liaoning-Shenyang National Laboratory for Materials Science (20180510004), the National Natural Science Foundation of China (51479016, 51908409), and the Fundamental Research Funds for the Central Universities (3132023162).
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Yawei Shi: writing—original draft, writing—review and editing, conceptualization. Yi Zhang: methodology, data curation, investigation. Guobin Song: formal analysis, data curation. Ya Sun: resources. Guanghui Ding: resources, supervision.
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Shi, Y., Zhang, Y., Song, G. et al. Efficient removal of organic pollutants by activation of peroxydisulfate with the magnetic CoFe2O4/carbon nanotube composite. Environ Sci Pollut Res 31, 6835–6846 (2024). https://doi.org/10.1007/s11356-023-31567-5
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DOI: https://doi.org/10.1007/s11356-023-31567-5