Degradation of contaminants of emerging concern in a secondary effluent using synthesized MOF-derived photoanodes: A comparative study between photo-, electro- and photoelectrocatalysis

Autor(es)

Candia-Onfray, Christian ; Irikura, Kallyni ; Calzadilla, Wendy ; Rojas, Susana ; Zanoni, Maria Valnice Boldrin ; Salazar, Ricardo

• Tipo de documento: Artigo Científico
• Fonte: Chemosphere; v. 315, p. 11-pg., 2023-01-09.

Resumo

Three metal-organic framework (MOF)-based photoanodes were prepared by deposition on TiO(2 )nanotubes using Ti as substrate (Ti/TiO2NT): i) Ti/TiO2NT-Au@ZIF-8, ii) Ti/TiO2NT-Ru-3(BTC)(2), iii) Ti/TiO2NT-UiO-66(Zr)NH2. These photoanodes were characterized by FEG-SEM, EDX and DRX. The analyses showed a successful modification and a high homogeneity of the different MOFs on the Ti/TiO2NT surface. The photoanodes were studied in the degradation of Contaminants of Emerging Concern (CECs) in a spiked secondary effluent from a Municipal Wastewater Treatment Plant (MWWTP). Sodium diclofenac (DCF), sulfamethazine (SMT) and carbamazepine (CBZ) were used as CECs at low concentration (200 mu g/L each CEC). The samples were preconcentrated using Solid Phase Extraction (SPE) and analyzed by a HPLC-DAD system. The MOF-based photoanodes exhibited a high photoelectrochemical (PEC) activity towards the oxidation of CECs, achieving up to 50%, 70% and 80% of removal using Ti/TiO2NT-Au@ZIF-8, Ti/TiO2NT-UiO-66(Zr)NH2, Ti/TiO2NT-Ru-3(BTC), respectively. The influence of the generation of hydroxyl radical (AU)

• Processo FAPESP: 14/50945-4 - INCT 2014: Instituto Nacional de Tecnologias Alternativas para Detecção, Avaliação Toxicológica e Remoção de Micropoluentes e Radioativos
• Beneficiário: Maria Valnice Boldrin
• Modalidade de apoio: Auxílio à Pesquisa - Temático
• Processo FAPESP: 19/13113-4 - Processos foto (eletro) catalíticos e fotoeletro-fenton para eliminar contaminantes emergentes de águas de rejeito industriais
• Beneficiário: Maria Valnice Boldrin
• Modalidade de apoio: Auxílio à Pesquisa - Regular
• Processo FAPESP: 17/12790-7 - Preparação e caracterização de eletrodos nanoestruturados de TiO2 modificados com estruturas metal orgânico (MOFs) para a aplicação na pré-concentração e redução de CO2
• Beneficiário: Kallyni Irikura
• Modalidade de apoio: Bolsas no Brasil - Pós-Doutorado