Photo-Fenton oxidation of phenol and organochlorides (2,4-DCP and 2,4-D) in aqueous alkaline medium with high chloride concentration

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dc.contributor.authorChiavone Filho, Osvaldo
dc.contributor.authorLuna, Airton José de
dc.contributor.authorMachulek Júnior, Amilcar
dc.contributor.authorNascimento, Cláudio Augusto Oller do
dc.contributor.authorMoraes, José Ermírio Ferreira de
dc.date.accessioned2021-11-22T13:41:04Z
dc.date.available2021-11-22T13:41:04Z
dc.date.issued2012-11-30
dc.description.resumoA highly concentrated aqueous saline-containing 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 system composed of an annular reactor with a quartz immersion well and a medium-pressure mercury lamp (450 W). The study was conducted under special conditions to minimize the costs of acidification and neutralization, which are usual steps in this type of process. Photochemical reactions were carried out to investigate the influence of some process variables such as the initial concentration of Fe2+ ([Fe2+]0) from 1.0 up to 2.5 mM, the rate in mmol of H2O2 fed into the system () from 3.67 up to 7.33 mmol of H2O2/min during 120 min of reaction time, and the initial pH (pH0) from 3.0 up to 9.0 in the presence and absence of NaCl (60.0 g/L). Although the optimum pH for the photo-Fenton process is about 3.0, this particular system performed well in experimental conditions starting at alkaline and neutral pH. The results obtained here are promising for industrial applications, particularly in view of the high concentration of chloride, a known hydroxyl radical scavenger and the main oxidant present in photo-Fenton processespt_BR
dc.identifier.citationLUNA, Airton José de; CHIAVONE-FILHO, Osvaldo ; MACHULEK JR., Amilcar; MORAES, José Ermírio Ferreira de; NASCIMENTO, Claudio Augusto Oller do. Photo-Fenton oxidation of phenol and organochlorides (2,4-DCP and 2,4-D) in aqueous alkaline medium with high chloride concentration. Journal of Environmental Management, v. 111, p. 10-17, 2012. Disponível em: https://www.sciencedirect.com/science/article/pii/S0301479712003295?via%3Dihub. Acesso em: 22 jun. 2021. https://doi.org/10.1016/j.jenvman.2012.06.014.pt_BR
dc.identifier.doi10.1016/j.jenvman.2012.06.014
dc.identifier.issn0301-4797
dc.identifier.urihttps://repositorio.ufrn.br/handle/123456789/44956
dc.languageenpt_BR
dc.publisherElsevierpt_BR
dc.rightsAttribution 3.0 Brazil*
dc.rights.urihttp://creativecommons.org/licenses/by/3.0/br/*
dc.subjectPhoto-Fentonpt_BR
dc.subjectSodium chloridept_BR
dc.subjectPesticidespt_BR
dc.titlePhoto-Fenton oxidation of phenol and organochlorides (2,4-DCP and 2,4-D) in aqueous alkaline medium with high chloride concentrationpt_BR
dc.typearticlept_BR

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