Photocatalytic treatment of metoprolol with B-doped TiO2 : effect of water matrix, toxicological evaluation and identification of intermediates
Rodrigo Pereira Cavalcante, Renato Falcão Dantas, Heberton Wender, Bernardí Bayarri, Oscar González, Jaime Giménez, Santiago Esplugas, Amilcar Machulek Jr.
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Agradecimentos: The authors wish to thank the Brazilian Funding Agencies CNPq (Conselho Nacional de Desenvolvimento Científico e Tecnológico), CAPES (Coordenação de Aperfeiçoamento de Pessoal de Nível Superior), FUNDECT (Fundação de Apoio ao Desenvolvimento do Ensino, Ciência e Tecnologia do Estado...
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Agradecimentos: The authors wish to thank the Brazilian Funding Agencies CNPq (Conselho Nacional de Desenvolvimento Científico e Tecnológico), CAPES (Coordenação de Aperfeiçoamento de Pessoal de Nível Superior), FUNDECT (Fundação de Apoio ao Desenvolvimento do Ensino, Ciência e Tecnologia do Estado de Mato Grosso do Sul) and INCT-EMA (Instituto Nacional de Ciência e Tecnologia de Estudos do Meio Ambiente). The authors also thank the Ministry of Science and Innovation of Spain (projects CTQ2011-26258 and NOVEDAR 2010CSD2007-00055) and AGAUR – Generalitat de Catalunya (project 2009SGR 1466) for funds received to carry out this work
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Abstract: The aim of this study was to investigate the effectiveness of B doped TiO2 on the removal of metoprolol tartrate salt (MET) in ultrapure water (UW) and municipal secondary effluent (SE) using a Xenon lamp (photon flux of 2.99 × 10-6 Einstein s-1) as irradiation source. The analyzed...
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Abstract: The aim of this study was to investigate the effectiveness of B doped TiO2 on the removal of metoprolol tartrate salt (MET) in ultrapure water (UW) and municipal secondary effluent (SE) using a Xenon lamp (photon flux of 2.99 × 10-6 Einstein s-1) as irradiation source. The analyzed parameters were MET removal, total organic carbon (TOC), chemical oxygen demand (COD), biochemical oxygen demand (BOD5) and acute toxicity (Microtox®). The optimal photocatalyst concentration was determined in both matrices. After 180 min of irradiation, 70% and 44% of MET were removed using 0.4 g L-1 catalyst in UW and 2.0 g L-1 catalyst in SE, respectively. A substantial improvement of biodegradability (BOD5/COD) was also achieved. The acute eco-toxicity decreased when MET was degraded and no toxic products were formed at the end of the process. Several reaction intermediates generated during the MET removal were identified and a possible degradation pathway was proposed for the TiO2/5%B(w/w) reaction. Photocatalysis with B-doped TiO2 can be considered as an interesting MET degradation alternative, leading to higher removals and potential to use solar energy, thus, minimizing the operating costs
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CONSELHO NACIONAL DE DESENVOLVIMENTO CIENTÍFICO E TECNOLÓGICO - CNPQ
COORDENAÇÃO DE APERFEIÇOAMENTO DE PESSOAL DE NÍVEL SUPERIOR - CAPES
FUNDAÇÃO DE APOIO AO DESENVOLVIMENTO DO ENSINO, CIÊNCIA E TECNOLOGIA DO ESTADO DE MATO GROSSO DO SUL - FUNDECT
Fechado
Photocatalytic treatment of metoprolol with B-doped TiO2 : effect of water matrix, toxicological evaluation and identification of intermediates
Rodrigo Pereira Cavalcante, Renato Falcão Dantas, Heberton Wender, Bernardí Bayarri, Oscar González, Jaime Giménez, Santiago Esplugas, Amilcar Machulek Jr.
Photocatalytic treatment of metoprolol with B-doped TiO2 : effect of water matrix, toxicological evaluation and identification of intermediates
Rodrigo Pereira Cavalcante, Renato Falcão Dantas, Heberton Wender, Bernardí Bayarri, Oscar González, Jaime Giménez, Santiago Esplugas, Amilcar Machulek Jr.
Fontes
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Applied catalysis B: environmental v. 176-177, p. 173-182, Oct. 2015 |