Autor(es)

Costa-Serge, Nayara de M. ; Goncalves, Rosembergue G. Lima ; Ramirez-Ubillus, Manuel A. ; Li, Chan ; Hammer, Peter ; Chiron, Serge ; Nogueira, Raquel F. Pupo

• Tipo de documento: Artigo Científico
• Fonte: APPLIED CATALYSIS B-ENVIRONMENTAL; v. 315, p. 12-pg., 2022-05-26.

Resumo

The influence of the interlamellar anion in Layered Double Hydroxide was investigated for the first time in Fenton-like and solar photo-Fenton processes for the degradation of the anticancer drug 5-fluorouracil (5-FU). LDHs of the MgFeCu type were synthesized by coprecipitation with the insertion of CO32-, NO3- , SO42- and B(OH)4- . A strong effect of the interlamellar anion was observed on the catalytic activity with pseudo-first-order rate constant sequence (k): CuMgFe-B(OH)4 > CuMgFe-NO3 > CuMgFe-SO4 > CuMgFe-CO3. Using CuMgFe-B(OH)4, 5-FU was completely degraded under solar radiation after 20 min and after 40 min in the dark, with degradation efficiency maintained above 90% until the fourth cycle of use. It was found that molecular B-O and B-OH interactions induced modifications of the CuMgFe-B(OH)4 surface charge density, accelerating the reduction of Cu (II) and Fe(III), thus favoring reactive oxygen species generation. This performance denotes the excellent potential of CuMgFe-B(OH)4 for 5-FU degradation. (AU)

• Processo FAPESP: 18/17517-0 - Hidróxidos duplos lamelares como catalisadores em processo foto-Fenton heterogêneo para a degradação de fármacos presentes em efluente hospitalar
• Beneficiário: Nayara de Melo Costa Serge
• Modalidade de apoio: Bolsas no Brasil - Doutorado
• Processo FAPESP: 18/12780-4 - Sistema de tratamento inovador decentralizado e de baixo custo para ótimo gerenciamento de águas residuais urbanas
• Beneficiário: Raquel Fernandes Pupo Nogueira
• Modalidade de apoio: Auxílio à Pesquisa - Regular