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Preparation of in-situ nitrogen-doped lignin-based porous carbon and its efficient adsorption of chloramphenicol in water

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Abstract

Porous carbon is an excellent absorbent for pollutants in water. Here, we report a breakthrough in performance of porous carbon based on lignin prepared using sodium lignosulfonate (SLS), potassium carbonate and melamine as precursor, activator and nitrogen source, respectively. A series of characterization tests confirmed that in-situ nitrogen doping greatly enhanced porous structure, resulting in a specific surface area of 2567.9 m2 g−1 and total pore volume of 1.499 cm3 g−1, which is nearly twice that of non-nitrogen-doped porous carbon. Moreover, adsorption experiments revealed that at 303 K, the saturated adsorption capacity of chloramphenicol was as high as 713.7 mg g−1, corresponding to an improvement of 33.7%. Further, the prepared porous carbon exhibited a strong anti-interference against metal ions and humic acid. The adsorption process was confirmed to be an endothermic reaction dominated by physical adsorption, indicating that an increase in temperature is conducive to adsorption. The results of this study show that nitrogen-doped lignin-based porous carbon prepared by in-situ doping is a promising material to significantly alleviate water pollution owing to its low cost, excellent pore structure and good adsorption properties.

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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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Funding

This work was supported by the Fundamental Research Funds for the Central Universities of Chang’an University (No. 300102290104), Natural Science Foundation of Shaanxi Province (No. 2021JM-152, No. 2021JM-153),Scientific Innovation Practice Project of Postgraduates of Chang’ an University.

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Contributions

Conception and design: Aixia Chen, Yixuan Zhang and Xiao Wei. Acquisition of data: Aixia Chen, Ruirui Hu, Yixuan Zhang and Juanjuan Guan. Analysis and interpretation of the data: Yixuan Zhang, Jiaju Pang and Xiao Wei. Writing of the manuscript: Yixuan Zhang and Aixia Chen. Critical revision of the manuscript for important intellectual content: Aixia Chen, Xiao Wei and Yixuan Zhang. Aixia Chen and Yixuan Zhang contributed equally to this work.

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Correspondence to Aixia Chen.

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Responsible Editor: Angeles Blanco

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Highlights

• Porous carbon could be quickly prepared by in-situ N-doped method.

• PCN-0.5 had high specific surface area and pore volume with high adsorption capacity.

• The strong anti-interference ability made PCN-0.5 have huge application potential.

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Chen, A., Zhang, Y., Wei, X. et al. Preparation of in-situ nitrogen-doped lignin-based porous carbon and its efficient adsorption of chloramphenicol in water. Environ Sci Pollut Res 29, 74306–74318 (2022). https://doi.org/10.1007/s11356-022-20045-z

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  • DOI: https://doi.org/10.1007/s11356-022-20045-z

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