Phosphorus doped cyanobacterial biochar catalyzes efficient persulfate oxidation of the antibiotic norfloxacin
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In this study, cyanobacterial biochars (CBs) enriched/doped with non-metallic elements were prepared by pyrolysis of biomass amended with different N, S, and P containing compounds. Their catalytic reactivity was tested for persulfate oxidation of the antibiotic norfloxacin (NOR). N and S doping failed to improve CB catalytic reactivity, while P doping increased reactivity 5 times compared with un-doped biochar. Biochars produced with organic phosphorus dopants showed the highest reactivity. Post-acid-washing improved catalytic reactivity. In particular, 950 ℃ acid-washed triphenyl-phosphate doped CB showed the largest degradation rate and reached 79% NOR mineralization in 2 h. Main attributes for P-doped CBs high reactivity were large specific surface areas (up to 655 m2/g), high adsorption, high C-P-O content, graphitic P and non-radical degradation pathway (electron transfer). This study demonstrates a new way to reuse waste biomass by producing efficient P-doped metal-free biochars and presents a basic framework for designing carbon-based catalysts for organic pollutant degradation.
Originalsprog | Engelsk |
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Artikelnummer | 129785 |
Tidsskrift | Bioresource Technology |
Vol/bind | 388 |
Antal sider | 10 |
ISSN | 0960-8524 |
DOI | |
Status | Udgivet - 2023 |
Bibliografisk note
Funding Information:
The authors thank the China Scholarship Council (CSC) and the Sino-Danish Center for Education and Research (SDC) for financial support to Chen Wang. Nadia Dodge and Poul Erik Jensen are thanked for their great assistance in providing algae feedstock. Anita S. Sandager, Birgitte B. Rasmussen, Dominique Jeanette Tobler, Henriette Rifbjerg Erichsen, Hui Ma, and Changyong Lu are thanked for helping carry out the BET, C/N, ICP-OES, UPLC/MS, EPR, SEM, and XPS analyzes.
Funding Information:
The authors thank the China Scholarship Council (CSC) and the Sino-Danish Center for Education and Research (SDC) for financial support to Chen Wang. Nadia Dodge and Poul Erik Jensen are thanked for their great assistance in providing algae feedstock. Anita S. Sandager, Birgitte B. Rasmussen, Dominique Jeanette Tobler, Henriette Rifbjerg Erichsen, Hui Ma, and Changyong Lu are thanked for helping carry out the BET, C/N, ICP-OES, UPLC/MS, EPR, SEM, and XPS analyzes.
Publisher Copyright:
© 2023 The Author(s)
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