Please use this identifier to cite or link to this item: http://repositorio.unicamp.br/jspui/handle/REPOSIP/242978
Type: Artigo
Title: Catalytic studies for the abatement of emerging contaminants by ozonation
Author: Martins, Rui C.
Cardoso, Mafalda
Dantas, Renato F.
Sans, Carmen
Esplugas, Santiago
Quinta-Ferreira, Rosa M.
Abstract: BACKGROUNDPharmaceutical industry generates a large amount of liquid effluents rich in toxic compounds that reach natural water streams, if improperly degraded, being a threat for ecosystems. In this context, ozonation appears as an interesting alternative to conventional treatments. This work aims to study the effect of this technology aided by two ceramic catalysts (the laboratory Mn-Ce-O and the commercial N-150) on the degradation of a mixture of two contaminants: sulfamethoxazole and diclofenac. RESULTS: The presence of the catalysts had no significant impact on pharmaceuticals removal when compared with single ozonation. However, both materials increased the amount of COD removed per mg of ozone applied (0.10 mgCOD(removed) mg(-1)O(3) and 0.067 mgCOD(removed) mg(-1)O(3) for catalytic and single ozonation, respectively). The performance of Mn-Ce-O was very dependent upon the solution pH whereas no significant pH impact was detected for N-150. The generalized kinetic model (GKM) was able to satisfactorily describe the lumped kinetic mechanism concerning COD abatement. Moreover, no differences in the degradation results were observed for the Mn-Ce-O system when comparing two types of waters (ultrapure and natural) used to dissolve the pharmaceutical compounds. Importantly, the presence of the solid catalyst improved ozone usage and reduced the effluents' toxicity. CONCLUSIONAlthough work has been published regarding the removal of single emerging contaminants, the analysis of mixtures is not so frequent. The use of Mn-Ce-O truly enhances COD degradation revealing its potential as heterogeneous catalytic material to improve ozone action on pollutants. (c) 2015 Society of Chemical Industry
Pharmaceutical industry generates a large amount of liquid effluents rich in toxic compounds that reach natural water streams, if improperly degraded, being a threat for ecosystems. In this context, ozonation appears as an interesting alternative to conve
Subject: Ozonização
Contaminantes emergentes
Diclofenaco
Country: Reino Unido
Editor: John Wiley & Sons
Citation: Catalytic Studies For The Abatement Of Emerging Contaminants By Ozonation. Wiley-blackwell, v. 90, p. 1611-1618 SEP-2015.
Rights: fechado
Fechado
Identifier DOI: 10.1002/jctb.4711
Address: https://onlinelibrary.wiley.com/doi/full/10.1002/jctb.4711
Date Issue: 2015
Appears in Collections:FT - Artigos e Outros Documentos

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