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Catalytic pyrolysis of lotus leaves for producing nitrogen self-doping layered graphitic biochar: Performance and mechanism for peroxydisulfate activation.
- Source :
-
Chemosphere [Chemosphere] 2022 Sep; Vol. 302, pp. 134868. Date of Electronic Publication: 2022 May 06. - Publication Year :
- 2022
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Abstract
- In this study, nitrogen self-doping layered graphitic biochar (Na-BC900) was prepared by catalytic pyrolysis of lotus leaves at 900  <superscript>°</superscript> C, in the presence of NaCl catalyst, for peroxydisulfate (PDS) activation and sulfamethoxazole (SMX) degradation. NaCl as catalyst played a crucial part in the preparation of Na-BC900 and could be reused. The SMX degradation rate in Na-BC900/PDS system was 12 times higher than that in un-modified biochar (BC900)/PDS system. The excellent performance of Na-BC900 for PDS activation was attributed to its large specific surface areas (SSAs), the enhanced graphitization structure and the high graphitic N content. The quenching and electrochemical experiments, electron paramagnetic resonance (EPR) studies inferred that the radicals included SO <subscript>4</subscript> <superscript>•-</superscript> , <superscript>•</superscript> OH, O <subscript>2</subscript> <superscript>•-</superscript> and the non-radical processes were driven by <superscript>1</superscript> O <subscript>2</subscript> and biochar mediated electron migration. Both radical and non-radical mechanisms contributed to the removal of SMX. Additionally, this catalytic pyrolysis strategy was clarified to be scalable, which can be applied to produce multiple biomass-based biochar catalysts for restoration of polluted water bodies.<br /> (Copyright © 2022 Elsevier Ltd. All rights reserved.)
Details
- Language :
- English
- ISSN :
- 1879-1298
- Volume :
- 302
- Database :
- MEDLINE
- Journal :
- Chemosphere
- Publication Type :
- Academic Journal
- Accession number :
- 35533937
- Full Text :
- https://doi.org/10.1016/j.chemosphere.2022.134868