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Environ Res ; 252(Pt 2): 118886, 2024 Jul 01.
Artigo em Inglês | MEDLINE | ID: mdl-38583659

RESUMO

In photo-Fenton technology, the narrower pH range limits its practical application for antibiotic wastewater remediation. Therefore, in this study, a Z-scheme heterojunction photo-Fenton catalyst was constructed by Fe-doped graphite-phase carbon nitride in combination with bismuth molybdate for the degradation of typical antibiotics. Fe doping can shorten the band gap and increase visible-light absorption. Simultaneously, the constructed Z-scheme heterojunction provides a better charge transfer pathway for the photo-Fenton reaction. Within 30 min, Fe3CN/BMO-3 removed 95.54% of tetracycline hydrochloride (TC), and its remarkable performance was the higher Fe3+/Fe2+ conversion efficiency through the decomposition of H2O2. The Fe3CN/BMO-3 catalyst showed remarkable photo-Fenton degradation performance in a wide pH range (3.0-11.0), and it also had good stability in the treatment of TC wastewater. Furthermore, the order of action of the active species was h+ > ·O2- > 1O2 > ·OH, and the toxicity assessment suggested that Fe3CN/BMO-3 was effective in reducing the biotoxicity of TC. The catalyst proved to be an economically feasible and applicable material for antibiotic photo-Fenton degradation, and this study provides another perspective on the application of elemental doping and constructed heterojunction photo-Fenton technology for antibiotic water environmental remediation.


Assuntos
Antibacterianos , Bismuto , Peróxido de Hidrogênio , Ferro , Molibdênio , Poluentes Químicos da Água , Bismuto/química , Antibacterianos/química , Antibacterianos/toxicidade , Concentração de Íons de Hidrogênio , Ferro/química , Poluentes Químicos da Água/química , Poluentes Químicos da Água/toxicidade , Peróxido de Hidrogênio/química , Molibdênio/química , Catálise , Grafite/química , Grafite/toxicidade , Compostos de Nitrogênio/química , Compostos de Nitrogênio/toxicidade , Nitrilas/química , Nitrilas/toxicidade , Águas Residuárias/química
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