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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.)

New operational mode of an electrochemical reactor and its application to the degradation of levofloxacin

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Author(s):
Rocha, Robson S. [1] ; Valim, Ricardo B. [2] ; Trevelin, Leandro C. [2] ; Silva, Fernando L. [2] ; Steter, Juliana R. [2] ; Zaiat, Marcelo [3] ; Lanza, Marcos R. V. [2, 4]
Total Authors: 7
Affiliation:
[1] Univ Sao Paulo, Escola Engn Lorena, Estr Municipal Campinho Sn, BR-12602810 Lorena, SP - Brazil
[2] Univ Sao Paulo, Inst Quim Sao Carlos, Av Trabalhador Sao Carlense 400, BR-13560970 Sao Carlos, SP - Brazil
[3] Univ Sao Paulo, Escola Engn Sao Carlos, Av Trabalhador Sao Carlense 400, BR-13560970 Sao Carlos, SP - Brazil
[4] UNESP, Inst Nacl Tecnol Alternat Deteccao, Avaliacao Toxicol & Remocao Micropoluentes & Radi, Inst Quim, Caixa Postal 355, BR-14800900 Araraquara, SP - Brazil
Total Affiliations: 4
Document type: Journal article
Source: JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING; v. 5, n. 5, p. 4441-4446, OCT 2017.
Web of Science Citations: 4
Abstract

The flow-by electrochemical reactor is generally used in batch mode with extended process time in order to achieve high efficiency in the removal of organic contaminant from aqueous solution. Moreover, the batch mode system is inappropriate for the treatment of wastewater in high volume or as a continuous stream. This paper presents a new operational mode for the electrochemical reactor in which the electrolyte passes over the electrodes just once at a reduced flow rate and with high hydraulic retention time. The concentration of hydrogen peroxide generated in the reactor running in the single-pass flow mode attained 10.2 mg L-1 cm(-2) in acid medium, a value similar to that obtained previously with the same type of reactor operating in batch mode. In the single-pass mode, the electrochemical reactor showed high rates of removal of the antibiotic levofloxacin (initial 50 mg L-1) and organic load (initial 130 mg L-1) up to 99 and 86%, respectively, when operated under electro-or photo-Fenton degradation conditions (acid medium with Fe2+ ions; absence or presence of UV irradiation). Degradation of levofloxacin generated high levels of nitrate (up to 4.5 mg L-1) and various by `products that could be identified by liquid chromatography-mass spectrometry. (AU)

FAPESP's process: 13/02762-5 - Development of technologies to prevent pollution: degradation and monitoring online of antibiotics in sewage
Grantee:Robson da Silva Rocha
Support type: Research Grants - Young Investigators Grants
FAPESP's process: 13/16690-6 - Study of the degradation of the antibiotics amoxicillin and ampicillin using gas diffusion electrodes modified with quinones (2-tert-butyl-9 ,10-anthraquinone and 2-ethyl-9,10-anthraquinone)
Grantee:Fernando Lindo Silva
Support type: Scholarships in Brazil - Doctorate
FAPESP's process: 14/50945-4 - INCT 2014: National Institute for Alternative Technologies of Detection, Toxicological Evaluation and Removal of Micropollutants and Radioactivies
Grantee:Maria Valnice Boldrin
Support type: Research Projects - Thematic Grants
FAPESP's process: 14/11486-4 - Production and evaluation of nanostructured binary metal oxides for the electrosynthesis of Hydrogen Peroxide (H2O2)
Grantee:Leandro Cesar Trevelin
Support type: Scholarships in Brazil - Master
FAPESP's process: 16/01937-4 - Synthesis of binary metal oxides (Nb, Zr, ta, Ru, mo and co) supported on amorphous carbon for the production of gas diffusion electrodes (GDE) for the electrosynthesis of H2O2 in situ in flow reactors
Grantee:Marcos Roberto de Vasconcelos Lanza
Support type: Regular Research Grants