Investigate the Synergistic Mechanism of Nitrogen/sulfur co-doped Carbon and Its Application in the Remediation of Heavy Metals
DOI:
https://doi.org/10.61173/hm4z3m21Keywords:
NBCs, heavy metal remediation, synergistic mechanism, carbon neutralityAbstract
Heavy metal pollution has become a serious global threat, causing great damage to the environment and human health. Nitrogen/sulfur co-doped biochar(NBCs) is of significant importance for the remediation of heavy metal pollution. This paper aims to deeply explore the synergistic mechanism of NBCs in heavy metal remediation. It has been found that NBCs can optimize the pore structure and surface chemical properties of biochar, and significantly improve the adsorption efficiency and stability of heavy metals. This paper also systematically reviews various synthesis processes and modification mechanisms of NBCs, and explores the oxidative precipitation and chemical fixation mechanisms of NBCs in the system of synergistic oxidants. However, existing research still faces challenges such as unclear synergistic remediation mechanisms for multiple metals, insufficient long-term stability of the carbon skeleton, and lack of verification for large-scale applications. In the future, new preparation processes need to be developed to promote the application of NBCs in complex environments, providing theoretical support and practical reference for the development of green and sustainable remediation technologies.
References
[1] Hou, Deyi, et al. „Global soil pollution by toxic metals threatens agriculture and human health.“ Science 388.6744 (2025): 316-321.
[2] Rafique, M., Hajra, S., Tahir, M.B. et al. A review on sources of heavy metals, their toxicity and removal technique using physico-chemical processes from wastewater. Environ Sci Pollut Res 29, 16772–16781 (2022).
[3] Yang, Shengfeng, et al. “Insights into remediation of cadmium and lead contaminated-soil by Fe-Mn modified biochar.” Journal of Environmental Chemical Engineering 12.3 (2024): 112771.
[4] Liu, Yihuan, et al. “Fabrication, application, and mechanism of metal and heteroatom co-doped biochar composites (MHBCs) for the removal of contaminants in water: A review.” Journal of hazardous materials 431 (2022): 128584. Dean&Francis Hanyi Huang
[5] Qi, Baochuan, et al. “Enhanced nickel removal by N, S codoped hierarchical porous biochar in capacitive deionization process: Performance and application.” Chemical Engineering Journal 504 (2025): 158686.
[6] Lai, Mengna, et al. “N, S-codoped biochar outperformed N-doped biochar on co-activation of H2O2 with trace dissolved Fe (Ⅲ) for enhanced oxidation of organic pollutants.” Environmental Pollution 334 (2023): 122208.
[7] Li, Zhenhao, et al. “A high-performance biochar produced from bamboo pyrolysis with in-situ nitrogen doping and activation for adsorption of phenol and methylene blue.” Chinese Journal of Chemical Engineering 28.11 (2020): 2872-2880.
[8] Yu, Jiangfang, et al. “Non-radical oxidation by N, S, P codoped biochar for persulfate activation: Different roles of exogenous P/S doping, and electron transfer path.” Journal of Cleaner Production 374 (2022): 133995.
[9] Chen, Jiashan, et al. „Enhanced CO2 capture performance of N, S co-doped biochar prepared by microwave pyrolysis: Synergistic modulation of microporous structure and functional groups.“ Fuel 379 (2025): 132987.
[10] Cao, Jun, et al. „Sludge-based biochar preparation: Pyrolysis and co-pyrolysis methods, improvements, and environmental applications.“ Fuel 373 (2024): 132265.
[11] Zhang Weiming, et al. „Review and Prospect of the Structure, Physicochemical Properties of Biochar.“ Acta Agronomica Sinica 47. 01 (2021): 1-18.
[12] Wu Yang. Study on the Regulation of the Structure and Properties of Biomass-based Porous Carbon via Pyrolysis Carbonization by the Template Method. 2022. Northeast Agricultural University, Master‘s thesis.
[13] LOC, Nguyen Xuan, and Thi My Do. „Optimizing biochar production: a review of recent progress in lignocellulosic biomass pyrolysis.“ Frontiers of Agricultural Science and Engineering 12.1 (2025): 148-172.
[14] Xu, Linan, et al. „Nitrogen-sulfur co-doped magnetic biochar efficiently activates hydrogen peroxide for the degradation of sulfamethazine.“ Chemical Engineering Journal 498 (2024): 155477.
[15] Zhang, Xiaodi, et al. „Catalytic performance of CH4– CO2 reforming over metal free nitrogen-doped biomass carbon catalysts: Effect of different preparation methods.“ International Journal of Hydrogen Energy 46.62 (2021): 31586-31597.
[16] Wang, Guiqiang, et al. „Interconnected nitrogen and sulfur co-doped graphene-like porous carbon nanosheets with high electrocatalytic activity as counter electrodes for dye-sensitized and quantum dot-sensitized solar cells.“ Electrochimica Acta 290 (2018): 273-281.
[17] Zaman, Md Wahad Uz, et al. „Design of bifunctional nitrogen-doped biochar with adsorption and catalytic oxidation capabilities for enhanced toluene emission control.“ Environmental Research (2025): 120867.
[18] Cui, Jiaqi, et al. „Nitrogen/Sulfur Co-Doped Biochar for Peroxymonosulfate Activation in Paracetamol Degradation: Mechanism Insight and Toxicity Evaluation.“ Catalysts 15.2 (2025): 121.
[19] Kasera, Nitesh, Praveen Kolar, and Steven G. Hall. „Nitrogen-doped biochars as adsorbents for mitigation of heavy metals and organics from water: A review.“ Biochar 4.1 (2022): 17.
[20] Seyedi, Neda, et al. „High-efficiency adsorption of heavy metals on sulfur nanoparticles coated biochar derived from alfalfa residues and its biological effects.“ Biomass Conversion and Biorefinery 14.22 (2024): 29201-29216.
[21] Sun, Yuxuan, et al. „Heteroatom-doped biochar devised from cellulose for CO2 adsorption: a new vision on competitive behavior and interactions of N and S.“ Biochar 5.1 (2023): 76.
[22] Zhang, Hao, et al. „Fabrication of modified-N-doped porous biochar and its enhanced adsorption of bisphenol-A: Critical contribution to π–π interactions by nitrogen doping.“ Surfaces and Interfaces 45 (2024): 103880.
[23] Liu Rongqin, et al. „Influence of pH and Coexisting Metal Ions on the Stability of Lead Adsorbed by Biochar.“ Soils 49.3 (2017): 467-475.
[24] Guo, Rongshuo, et al. „Synergistic oxidation and reduction of complex pollutants in wastewater using a self-cycling piezo-photocatalytic fenton system.“ Journal of Hazardous Materials 490 (2025): 137774.
[25] Weng, Zonglin, et al. „Site engineering of covalent organic frameworks for regulating peroxymonosulfate activation to generate singlet oxygen with 100% selectivity.“ Angewandte Chemie 135.43 (2023): e202310934.
[26] Li Honghong, et al. „Adsorption Characteristics and Mechanisms of Pb²⁺ by Micro-nano Nitrogen-containing Straw Biochar.“ Journal of Ecology and Rural Environment 39.10 (2023): 1346-1355.
[27] Fan, Jiajun, et al. „Remediation of cadmium and lead polluted soil using thiol-modified biochar.“ Journal of hazardous materials 388 (2020): 122037.
[28] Zhao, JingJing, et al. „Comparison of biochars derived from different types of feedstock and their potential for heavy metal removal in multiple-metal solutions.“ Scientific Reports 9.1 (2019): 9869.
[29] Shi, Yawei, et al. „Protein-derived nitrogen and sulfur co-doped carbon for efficient adsorptive removal of heavy metals.“ Chinese Journal of Chemical Engineering 27.10 (2019): 2581-2586.
[30] Polyakov, Vladimir, et al. „MOF-biochar nanocomposite for sustainable remediation of contaminated soil.“ Environmental Science and Pollution Research (2025): 1-18.
[31] Ghassemi-Golezani, Kazem, Sedigheh Latifi, and Salar Farhangi-Abriz. „Biochar-mediated remediation of nickel and copper improved nutrient availability and physiological performance of dill plants.“ Scientific Reports 15.1 (2025): 13660.
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