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Antibiotics mineralization by electrochemical and UV-based hybrid processes: evaluation of the synergistic effect.
Wohlmuth da Silva, Salatiel; Arenhart Heberle, Alan Nelson; Pereira Santos, Alexia; Siqueira Rodrigues, Marco Antônio; Pérez-Herranz, Valentín; Moura Bernardes, Andréa.
Afiliação
  • Wohlmuth da Silva S; Programa de Pós-Graduação em Engenharia de Minas, Metalúrgica e de Materiais (PPGE3M), Universidade Federal do Rio Grande do Sul (UFRGS) , Porto Alegre , Brasil.
  • Arenhart Heberle AN; Grupo IEC. Departamento de Ingeniería Química y Nuclear, E.T.S.I. Industriales, Universitat Politècnica de València , Valencia , Spain.
  • Pereira Santos A; Programa de Pós-Graduação em Engenharia de Minas, Metalúrgica e de Materiais (PPGE3M), Universidade Federal do Rio Grande do Sul (UFRGS) , Porto Alegre , Brasil.
  • Siqueira Rodrigues MA; Programa de Pós-Graduação em Engenharia de Minas, Metalúrgica e de Materiais (PPGE3M), Universidade Federal do Rio Grande do Sul (UFRGS) , Porto Alegre , Brasil.
  • Pérez-Herranz V; Instituto de Ciências Exatas e Tecnológicas, Universidade Feevale , Novo Hamburgo , Brasil.
  • Moura Bernardes A; Grupo IEC. Departamento de Ingeniería Química y Nuclear, E.T.S.I. Industriales, Universitat Politècnica de València , Valencia , Spain.
Environ Technol ; 40(26): 3456-3466, 2019 Nov.
Article em En | MEDLINE | ID: mdl-29770731
Antibiotics are not efficiently removed in conventional wastewater treatments. In fact, different advanced oxidation process (AOPs), including ozone, peroxide, UV radiation, among others, are being investigated in the elimination of microcontaminants. Most of AOPs proved to be efficient on the degradation of antibiotics, but the mineralization is on the one hand not evaluated or on the other hand not high. At this work, the UV-based hybrid process, namely Photo-assisted electrochemical oxidation (PEO), was applied, aiming the mineralization of microcontaminants such as the antibiotics Amoxicillin (AMX), Norfloxacin (NOR) and Azithromycin (AZI). The influence of the individual contributions of electrochemical oxidation (EO) and the UV-base processes on the hybrid process (PEO) was analysed. Results showed that AMX and NOR presented higher mineralization rate under direct photolysis than AZI due to the high absorption of UV radiation. For the EO processes, a low mineralization was found for all antibiotics, what was associated to a mass-transport limitation related to the low concentration of contaminants (200 µg/L). Besides that, an increase in mineralization was found, when heterogeneous photocatalysis and EO are compared, due to the influence of UV radiation, which overcomes the mass-transport limitations. Although the UV-based processes control the reaction pathway that leads to mineralization, the best results to mineralize the antibiotics were achieved by PEO hybrid process. This can be explained by the synergistic effect of the processes that constitute them. A higher mineralization was achieved, which is an important and useful finding to avoid the discharge of microcontaminants in the environment.
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Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Assunto principal: Raios Ultravioleta / Poluentes Químicos da Água Idioma: En Revista: Environ Technol Assunto da revista: SAUDE AMBIENTAL / TOXICOLOGIA Ano de publicação: 2019 Tipo de documento: Article País de afiliação: Brasil País de publicação: Reino Unido
Texto completo
Adicionar na Minha BVS
Imprimir
XML
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Buscar no Google

Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Assunto principal: Raios Ultravioleta / Poluentes Químicos da Água Idioma: En Revista: Environ Technol Assunto da revista: SAUDE AMBIENTAL / TOXICOLOGIA Ano de publicação: 2019 Tipo de documento: Article País de afiliação: Brasil País de publicação: Reino Unido