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author:

He, Y. (He, Y..) [1] | Yang, Y. (Yang, Y..) [2] | Ye, X. (Ye, X..) [3] | Lv, Y. (Lv, Y..) [4] | Liu, Y. (Liu, Y..) [5] | Liu, M. (Liu, M..) [6]

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Scopus

Abstract:

Biochar derived from sludge is recognized for its sustainable and cost-effective role in advanced oxidation processes, yet its restricted catalytic capacity poses significant challenges. In this work, nitrogen (8.43 at%) and sulfur (1.39 at%) co-doped biochar (ML-SDBC) featuring a large surface area of 161.14 m2/g was synthesized by the pyrolysis of sewage sludge and sulfonated lignin without external dopants. In the synthesis of ML-SDBC, graphitic nitrogen and thiophene sulfur were efficiently integrated into the carbon framework. Furthermore, the resulting biochar notably outperformed sludge-derived biochar (SDBC) in activating peroxymonosulfate (PMS) for sulfadiazine (SDZ) degradation, achieving a 31.9% higher removal rate within 120 min and exhibiting a rate constant (kobs) of 1.73×10−2 min−1, effectively tripling the efficiency compared to that of SDBC-driven processes. The degradation rate consistently exceeded 85% across a wide pH range of 3–9. Mechanistic analysis exhibited that degradation processes involved radical and non-radical pathways, with 1O2 playing a prominent role. Furthermore, density functional theory (DFT) calculations revealed that the catalytic potential in ML-SDBC would benefit from the synergistic interaction between graphitic nitrogen and thiophene sulfur. This study presents a novel synthesis of heteroatom-doped biochar from waste, offering a sustainable solution to antibiotic pollution and waste management challenges. © 2024 Elsevier Ltd

Keyword:

Biochar Biomass Catalytic oxidation Heteroatoms doping

Community:

  • [ 1 ] [He Y.]Fujian Provincial Engineering Research Center of Rural Waste Recycling Technology, College of Environment & Safety Engineering, Fuzhou University, Fuzhou, 350108, China
  • [ 2 ] [Yang Y.]Fujian Provincial Engineering Research Center of Rural Waste Recycling Technology, College of Environment & Safety Engineering, Fuzhou University, Fuzhou, 350108, China
  • [ 3 ] [Ye X.]Fujian Provincial Engineering Research Center of Rural Waste Recycling Technology, College of Environment & Safety Engineering, Fuzhou University, Fuzhou, 350108, China
  • [ 4 ] [Lv Y.]Fujian Provincial Engineering Research Center of Rural Waste Recycling Technology, College of Environment & Safety Engineering, Fuzhou University, Fuzhou, 350108, China
  • [ 5 ] [Liu Y.]Fujian Provincial Engineering Research Center of Rural Waste Recycling Technology, College of Environment & Safety Engineering, Fuzhou University, Fuzhou, 350108, China
  • [ 6 ] [Liu M.]Fujian Provincial Engineering Research Center of Rural Waste Recycling Technology, College of Environment & Safety Engineering, Fuzhou University, Fuzhou, 350108, China
  • [ 7 ] [Liu M.]College of Environmental and Biological Engineering, Putian University, Putian, 351100, China

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Source :

Journal of Environmental Chemical Engineering

ISSN: 2213-3437

Year: 2024

Issue: 3

Volume: 12

7 . 4 0 0

JCR@2023

Cited Count:

WoS CC Cited Count:

SCOPUS Cited Count: 1

ESI Highly Cited Papers on the List: 0 Unfold All

WanFang Cited Count:

Chinese Cited Count:

30 Days PV: 4

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