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One-step preparation of magnetic N-doped sodium alginate–based porous carbon and efficient adsorption of bisphenol A

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Abstract

To resourcefully utilize algal biomass and effectively remove bisphenol A (BPA) from water, sodium alginate (SA) was prepared as the nitrogen-doped magnetic porous carbon material (SAC/N/Fe) with well-developed pore structure according to a one-step method using K2CO3, melamine, Fe(NO3)3·9H2O as the activator, nitrogen dopant, and magnetic precursor, respectively, in this study. The best product, SAC/N/Fe-0.2, was obtained by adjusting the mass ratio of raw materials, and its specific surface area and pore volume were 2240.65 m2 g−1 and 1.44 cm3 g−1, respectively, with a maximum adsorption capacity of 1248.23 mg g−1 for BPA at 308 K. SEM, XRD, XPS, VSM, and FT-IR characterization confirmed that the iron was successfully doped, giving the porous carbon a magnetic separation function. The adsorption process of BPA was more consistent with the Langmuir model and the proposed secondary kinetics, and the adsorption effect was stable and efficient in a wide pH range and under the interference of different metal ions. At the same time, the porous carbon was easy to separate and recover with good regeneration performance.

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The dataset used and/or analyzed during this study are available from the corresponding author on reasonable request.

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Authors

Contributions

Conception and design: Yaping Xie, Guoxing Du, and Linguo Lu. Acquisition of data: Yaping Xie, Guoxing Du, Jiaju Pang, and Linghan Kong. Analysis and interpretation of the data: Yaping Xie, Guoxing Du, and Jiaju Pang. Writing of the manuscript: Yaping Xie, Guoxing Du, and Linghan Kong. Critical revision of the manuscript for important intellectual content: Yaping Xie, Guoxing Du, and Linguo Lu.

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Correspondence to Linguo Lu.

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Responsible Editor: Tito Roberto Cadaval Jr

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Highlights

• A one-step process can rapidly prepare magnetic N porous carbon.

• SAC/N/Fe-0.2 has a high specific surface area (2240.65 m2 g−1) and pore volume (1.44 cm3 g−1).

• SAC/N/Fe-0.2 had a super high adsorption capacity of 1248.23 mg g−1 for bisphenol A at 308 K.

• SAC/N/Fe-0.2 has great application potential due to its strong anti-interference ability and magnetic separation ability.

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Xie, Y., Du, G., Pang, J. et al. One-step preparation of magnetic N-doped sodium alginate–based porous carbon and efficient adsorption of bisphenol A. Environ Sci Pollut Res 30, 99842–99854 (2023). https://doi.org/10.1007/s11356-023-29346-3

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  • DOI: https://doi.org/10.1007/s11356-023-29346-3

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