Journal article
New insight into degradation of chloramphenicol using a nanoporous Pd/Co3O4cathode: characterization and pathways analysis
The growing chloramphenicol (CAP) in wastewater brought a serious threat to the activity of activated sludge and the spread of antibiotics resistance bacteria. In this study, a highly ordered nanoporous Co3O4 layer growing on Co foil through anodization was prepared as cathode for nitro-group reduction and electrodeposited with Pd particles for dechlorination to reduce CAP completely.
After 3h treatment, almost 100% of CAP was reduced. Co2+ ions in Co3O4 served as catalytic sites for electrons transfer to CAP through a redox circle Co2+-Co3+-Co2+, which triggered nitro-group reduction at first. With the presence of Pd particles, more atomic H* were generated for dechlorination, which increased 22% of reduction efficiency after 3h treatment.
Therefore, a better capacity was achieved by Pd/Co3O4 cathode (K=0.0245min-1, K is reaction constant) than by other cathodes such as Fe/Co3O4 (K=0.0182min-1), Cu/Co3O4 (K=0.0164min-1), and pure Co3O4 (K=0.0106min-1). From the proposed reaction pathway, the ultimate product was carbonyl-reduced AM (dechlorinated aromatic amine product of CAP) without antibacterial activity, which demonstrated this cathodic technology was a feasible way for wastewater pre-treatment.
Language: | English |
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Publisher: | IOP Publishing |
Year: | 2022 |
Pages: | 210001 |
ISSN: | 13616528 and 09574484 |
Types: | Journal article |
DOI: | 10.1088/1361-6528/ac530c |
ORCIDs: | Zhang, Wenjing |