Phosphorus doped cyanobacterial biochar catalyzes efficient persulfate oxidation of the antibiotic norfloxacin
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Phosphorus doped cyanobacterial biochar catalyzes efficient persulfate oxidation of the antibiotic norfloxacin. / Wang, Chen; Holm, Peter E.; Andersen, Mogens Larsen; Thygesen, Lisbeth Garbrecht; Nielsen, Ulla Gro; Hansen, Hans Christian Bruun.
In: Bioresource Technology, Vol. 388, 129785, 2023.Research output: Contribution to journal › Journal article › Research › peer-review
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TY - JOUR
T1 - Phosphorus doped cyanobacterial biochar catalyzes efficient persulfate oxidation of the antibiotic norfloxacin
AU - Wang, Chen
AU - Holm, Peter E.
AU - Andersen, Mogens Larsen
AU - Thygesen, Lisbeth Garbrecht
AU - Nielsen, Ulla Gro
AU - Hansen, Hans Christian Bruun
N1 - Publisher Copyright: © 2023 The Author(s)
PY - 2023
Y1 - 2023
N2 - 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.
AB - 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.
KW - Antibiotic
KW - Degradation kinetics
KW - Environmental catalysis
KW - EPR
KW - Phosphorus doping
U2 - 10.1016/j.biortech.2023.129785
DO - 10.1016/j.biortech.2023.129785
M3 - Journal article
C2 - 37722544
AN - SCOPUS:85172329784
VL - 388
JO - Bioresource Technology
JF - Bioresource Technology
SN - 0960-8524
M1 - 129785
ER -
ID: 369343406