Photo-Fenton degradation of phenol, 2,4-dichlorophenoxyacetic acid and 2,4-dichlorophenol mixture in saline solution using a falling-film solar reactor

Photo-Fenton degradation of phenol, 2,4-dichlorophenoxyacetic acid and 2,4-dichlorophenol mixture in saline solution using a falling-film solar reactor

Author Luna, Airton J. Google Scholar
Nascimento, Claudio A. O. Google Scholar
Foletto, Edson Luiz Google Scholar
Moraes, Jose E. F. Autor UNIFESP Google Scholar
Chiavone-Filho, Osvaldo Google Scholar
Institution Natl Inst Ind Property
Universidade de São Paulo (USP)
Universidade Federal de Sergipe (UFS)
Universidade Federal de São Paulo (UNIFESP)
Univ Fed Rio Grande do Norte
Abstract In this work, a saline aqueous solution of phenol, 2,4-dichlorophenoxyacetic acid (2,4-D) and 2,4-dichlorophenol (2,4-DCP) was treated by the photo-Fenton process in a falling-film solar reactor. the influence of the parameters such as initial pH (5-7), initial concentration of Fe2+ (1-2.5 mM) and rate of H2O2 addition (1.87-3.74 mmol min(-1)) was investigated. the efficiency of photodegradation was determined from the removal of dissolved organic carbon (DOC), described by the species degradation of phenol, 2,4-D and 2,4-DCP. Response surface methodology was employed to assess the effects of the variables investigated, i.e. [Fe2+], [H2O2] and pH, in the photo-Fenton process with solar irradiation. the results reveal that the variables' initial concentration of Fe2+ and H2O2 presents predominant effect on pollutants' degradation in terms of DOC removal, while pH showed no influence. Under the most adequate experimental conditions, about 85% DOC removal was obtained in 180 min by using a reaction system employed here, and total removal of phenol, 2,4- and 2,4-DCP mixture in about 30 min.
Keywords photo-Fenton
phenol
dichlorophenoxyacetic acid
2
4-dichlorophenol
sunlight
falling-film reactor
Language English
Sponsor ANP (Agencia Nacional do Petroleo, Gas Natural e Biocombustiveis)
Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)
Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)
INCT-EMA (Institutos Nacionais de Ciencia e Tecnologia de Estudos do Meio Ambiente)
Date 2014-02-01
Published in Environmental Technology. Abingdon: Taylor & Francis Ltd, v. 35, n. 3, p. 364-371, 2014.
ISSN 0959-3330 (Sherpa/Romeo, impact factor)
Publisher Taylor & Francis Ltd
Extent 364-371
Origin http://dx.doi.org/10.1080/09593330.2013.828762
Access rights Closed access
Type Article
Web of Science ID WOS:000328475200014
URI http://repositorio.unifesp.br/handle/11600/37407

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