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Biblioteca(s): |
Embrapa Pesca e Aquicultura. |
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Data corrente: |
18/03/2015 |
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Data da última atualização: |
18/03/2015 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Autoria: |
LUIZ, D. de B.; JOSÉ, H. J.; MOREIRA, R. de F. P. M. |
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Afiliação: |
DANIELLE DE BEM LUIZ, CNPASA; HUMBERTO JORGE JOSÉ; REGINA DE FÁTIMA PERALTA MUNIZ MOREIRA. |
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Título: |
Kinetics of photocatalytic reduction of nitrate in synthetic and real effluent using TiO2 doped with Zn as photocatalyst. |
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Ano de publicação: |
2014 |
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Fonte/Imprenta: |
Journal of Chemical Technology and Biotechnology, Malden, 2014. |
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DOI: |
10.1002/jctb.4375 |
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Idioma: |
Inglês |
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Notas: |
Published online. |
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Conteúdo: |
BACKGROUND: The main industries that contribute to the presence of nitrate in water are the production of fertilizers, explosives, pulp and paper, and food products. Nitrate removal by filtration and advanced biological processes can be costly and generate unwantedwaste. The catalytic photoreduction of nitrate toN2 has recently been proposed.However, most studies do not address the kinetic aspects of the reactions. RESULTS: The kinetics model of Langmuir?Hinshelwood for nitrate photoreduction in the presence of formic acid in aqueous solution and in real industrial effluent using ZnO-TiO2 as the photocatalyst was proposed and adjusted to the experimental data obtained for a synthetic effluent (R2 = 0.991; apparent constant of the reaction was k′ R = 0.226 mg N (mg C min)−1). After adaptation the modelwas used to predict the reaction time required to remove a given concentration of nitrate fromthe effluent produced by a slaughterhouse (k′′ R = k′ R/2). CONCLUSION: The proposed kinetic model can be applied to any type of effluent, promoting the possibility of production of high quality reusewater, reduction of freshwater consumption, reduction of discharge of pollutants discharged inwater bodies, hence promoting the preservation of the environment. |
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Palavras-Chave: |
Nitratos. |
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Thesagro: |
Nitrato. |
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Thesaurus Nal: |
Denitrification; Kinetics. |
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Categoria do assunto: |
X Pesquisa, Tecnologia e Engenharia |
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Marc: |
null
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Registro original: |
Embrapa Pesca e Aquicultura (CNPASA) |
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