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Effect of pyrolytic temperatures on the 2,4-dichlorophenol adsorption performance of biochar derived from Populus nigra

  • Sustainable Waste Management and Resource Recovery
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Abstract

To investigate the correlation between the physicochemical properties of biochar and its adsorption performance for 2,4-dichlorophenol (2,4-DCP), Populus nigra was subjected to oxygen-limited pyrolysis at temperatures ranging from 300 to 600 ℃. The experimental results showed that as the pyrolysis temperature increased, the specific surface area and degree of graphitization of the resultant biochar increased, but the amount of oxygen-containing functional groups decreased. Populus nigra biochar produced at 450 ℃ exhibits the best adsorption performance for 2,4-DCP due to its excellent physicochemical properties and greater electron exchange capability. The removal of 2,4-DCP is a multi-step adsorption process dominated by chemisorption, which involved oxygen-containing functional groups–mediated hydrogen bonding, as well as π-π electron donor–acceptor (EDA) interaction between the aromatic rings and Cl atoms. The study highlights the potential of Populus nigra residues for producing biochar as an affordable and effective adsorbent for 2,4-DCP removal.

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

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Acknowledgements

We are truly grateful to the International Conference on Sustainable Waste Management and Resource Recovery (SWMR-2023), where this work was presented as a poster and the conference registration number 24435872.

Funding

This work was supported by the National Natural Science Foundation of China (Grant No. 51809019), Natural Science Foundation of Hunan Province (Grant No. 2022JJ30616), and Scientific Research Project of the Education Department of Hunan province (Grant No. 22B0338).

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G. Z.: resources, supervision, methodology, writing—original draft, writing reviewing and editing. L. Z.: investigation, visualization, writing reviewing and editing. T. C.: investigation, writing—original draft, writing reviewing and editing. X. F.: investigation. Y. F.: visualization. H. Z.: investigation. X. B.: investigation. Y. Z.: visualization.

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Correspondence to Lu Zhou.

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Responsible Editor: Zhihong Xu

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Zhang, G., Zhou, L., Chi, T. et al. Effect of pyrolytic temperatures on the 2,4-dichlorophenol adsorption performance of biochar derived from Populus nigra. Environ Sci Pollut Res (2024). https://doi.org/10.1007/s11356-024-31990-2

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  • DOI: https://doi.org/10.1007/s11356-024-31990-2

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