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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Photo-Fenton degradation of the pharmaceuticals ciprofloxacin and fluoxetine after anaerobic pre-treatment of hospital effluent

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Author(s):
de Lima Perini, Joao A. ; Costa e Silva, Beatriz ; Tonetti, Adriano L. ; Pupo Nogueira, Raquel F.
Total Authors: 4
Document type: Journal article
Source: Environmental Science and Pollution Research; v. 24, n. 7, p. 6233-6240, MAR 2017.
Web of Science Citations: 9
Abstract

This work evaluated the photo-Fenton degradation of two pharmaceuticals extensively used in human medicine, ciprofloxacin (CIP), and fluoxetine (FLU) when present in an anaerobic pre-treated hospital effluent (HE) at low concentration (100 mu g L-1). Operational parameters such as concentration of hydrogen peroxide, iron, and initial pH as well as the effect of iron citrate complex were evaluated considering the degradation of the pharmaceuticals. Iron citrate complex (Fecit) influenced significantly FLU degradation at pH 4.5 achieving 80 % after 20 min, while with iron nitrate only 36 % degradation was obtained after the same time. However, only a slight effect was observed on CIP degradation, achieving 86% with Fecit and 75% with Fe(NO3)(3), after 20 min. Samples of HE used in this work were previously treated in an anaerobic reactor followed by sand filtration; however, the presence of pharmaceuticals was detected. Degradation of both FLU and CIP was significantly hindered when present in HE, due to the relatively high content of organic (39.6 mg L-1) and inorganic (12.5 mg L-1) carbon, which may have consumed OH in side reactions. However, the iron cycle reduction was not affected by the matrix in the presence of citrate. Despite the recalcitrance of the matrix (no total organic carbon removal), it was possible to achieve over 50 % degradation of both pharmaceuticals after 90 min. (AU)

FAPESP's process: 15/21732-5 - Degradation of organic contaminants by heterogeneous fenton process mediated by modified magnetites and iron mining residues
Grantee:Raquel Fernandes Pupo Nogueira
Support type: Regular Research Grants