Caracterização de reator fotoquímico para aplicações em processos oxidativos avançados

  • Ailton Jose Moreira Programa de Pós-Graduação em Química, Universidade Federal de São Carlos, São Paulo, São Carlos, CEP 13565-905, Brasil. http://orcid.org/0000-0003-0741-8840
  • Thales Martins Silva Programa de Pós-Graduação em Engenharia Química, Universidade Federal de Alfenas, Minas Gerais, Poços de Caldas, Brasil http://orcid.org/0000-0001-6500-7447
  • Gian Paulo Giovanni Freschi Programa de Pós-Graduação em Engenharia Química, Universidade Federal de Alfenas, Minas Gerais, Poços de Caldas, CEP 37715-400, Brasil http://orcid.org/0000-0001-8153-3543

Resumo

This study broadens the understanding of photochemical processes by calculating the quantum efficiency of the Hg-MDEL lamp and discusses the environmental application of this lamp model in advanced oxidative processes. This set of information is relevant to broaden the application of Hg-MDEL in various environmental studies. Thus, a photochemical reactor composed of a microwave-fired mercury-free mercury (Hg-MDEL) lamp (MW) was evaluated from KI/KIO3 actinometric studies. The emission spectra were characterized along the UV-A, UV-B, UV-C and visible regions by means of a spectroradiometer, displaying linear correlation with the microwave power variation applied. The photochemical conversion of KI / KIO3 to I3- was up to 0.073 mmol L-1 when the KI initial concentration was 0.1 mol L-1 and 0.65 mmol L-1 when the KI concentration was 0.7 mol L-1, applying a microwave power of 600 and 400 W respectively. These results indicate that the photon emission near the reactor is more significant for higher powers, actively contributing to the formation of I3-.

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Publicado
2019-09-30
Como Citar
MOREIRA, Ailton Jose; SILVA, Thales Martins; FRESCHI, Gian Paulo Giovanni. Caracterização de reator fotoquímico para aplicações em processos oxidativos avançados. Acta Brasiliensis, [S.l.], v. 3, n. 3, p. 124-130, set. 2019. ISSN 2526-4338. Disponível em: <http://revistas.ufcg.edu.br/ActaBra/index.php/actabra/article/view/240>. Acesso em: 19 nov. 2019. doi: https://doi.org/10.22571/2526-4338240.
Seção
Química Ambiental