Tags

Type your tag names separated by a space and hit enter

Elimination of the antibiotic norfloxacin in municipal wastewater, urine and seawater by electrochemical oxidation on IrO2 anodes.
Sci Total Environ. 2017 Jan 01; 575:1228-1238.ST

Abstract

The electrochemical degradation of the fluoroquinolone antibiotic norfloxacin (NOR) on Ti/IrO2 anodes, in several aqueous matrices was evaluated. For this purpose, initially the performance and degradation routes of the technology at several pH values (3.0, 6.5, 7.5 and 9.0) and in the presence of some of the most common anions in real water matrices (Cl-, HCO3-, SO42- and NO3-) were determined. The results showed that the degradation of NOR can occur through both direct elimination at the electrode surface and mediated oxidation, via the electrogeneration of oxidative agents, such as active chlorine species and percarbonate ions, which come from chloride and bicarbonate oxidation, respectively. Conversely, nitrate ions showed to inhibit the efficiency of the system. Concerning the pH, the efficiency of the process in the presence of chloride ions followed the order: 9.0>7.5>6.5>3.0; showing a strong dependence of the NOR speciation, and being the anionic form of the antibiotic the more susceptible to be oxidized. Furthermore, the identification of three primary NOR by-products demonstrated that the initial attack of the active chlorine species, mainly HOCl, occurred at the secondary amine of the piperazine ring followed by chlorination of the benzene ring. The precedent findings were crucial to understand the efficiency of the technology to eliminate NOR in synthetic complex matrices such as seawater, municipal wastewater and urine. The electrochemical oxidation showed to be promissory to eliminate NOR, and its associated antimicrobial activity, in such complexes matrices. Waters at basic pH containing chloride or bicarbonate ions, such as seawater or municipal wastewater showed to be the most adapted to the application of the technology. Additionally, nitrate ions or urea, found in some matrices like fresh urine, reduce the efficiency of the process.

Authors+Show Affiliations

Grupo de Investigación en Remediación Ambiental y Biocatálisis (GIRAB), Instituto de Química, Facultad de Ciencias Exactas y Naturales, Universidad de Antioquía UdeA, Calle 70 No. 52-21, Medellín, Colombia.Grupo de Investigación en Remediación Ambiental y Biocatálisis (GIRAB), Instituto de Química, Facultad de Ciencias Exactas y Naturales, Universidad de Antioquía UdeA, Calle 70 No. 52-21, Medellín, Colombia.Fraunhofer IGB, Nobelstrasse 12, 70569 Stuttgart, Germany.Grupo de Investigación en Remediación Ambiental y Biocatálisis (GIRAB), Instituto de Química, Facultad de Ciencias Exactas y Naturales, Universidad de Antioquía UdeA, Calle 70 No. 52-21, Medellín, Colombia. Electronic address: ricardo.torres@udea.edu.co.

Pub Type(s)

Journal Article

Language

eng

PubMed ID

27720251

Citation

Jojoa-Sierra, Sindy D., et al. "Elimination of the Antibiotic Norfloxacin in Municipal Wastewater, Urine and Seawater By Electrochemical Oxidation On IrO2 Anodes." The Science of the Total Environment, vol. 575, 2017, pp. 1228-1238.
Jojoa-Sierra SD, Silva-Agredo J, Herrera-Calderon E, et al. Elimination of the antibiotic norfloxacin in municipal wastewater, urine and seawater by electrochemical oxidation on IrO2 anodes. Sci Total Environ. 2017;575:1228-1238.
Jojoa-Sierra, S. D., Silva-Agredo, J., Herrera-Calderon, E., & Torres-Palma, R. A. (2017). Elimination of the antibiotic norfloxacin in municipal wastewater, urine and seawater by electrochemical oxidation on IrO2 anodes. The Science of the Total Environment, 575, 1228-1238. https://doi.org/10.1016/j.scitotenv.2016.09.201
Jojoa-Sierra SD, et al. Elimination of the Antibiotic Norfloxacin in Municipal Wastewater, Urine and Seawater By Electrochemical Oxidation On IrO2 Anodes. Sci Total Environ. 2017 Jan 1;575:1228-1238. PubMed PMID: 27720251.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Elimination of the antibiotic norfloxacin in municipal wastewater, urine and seawater by electrochemical oxidation on IrO2 anodes. AU - Jojoa-Sierra,Sindy D, AU - Silva-Agredo,Javier, AU - Herrera-Calderon,Erika, AU - Torres-Palma,Ricardo A, Y1 - 2016/10/05/ PY - 2016/05/20/received PY - 2016/09/24/revised PY - 2016/09/24/accepted PY - 2016/10/11/pubmed PY - 2018/6/5/medline PY - 2016/10/11/entrez KW - Antimicrobial activity KW - DSA anodes KW - Electrochemical oxidation KW - Matrix effects KW - Norfloxacin speciation KW - Water treatment SP - 1228 EP - 1238 JF - The Science of the total environment JO - Sci Total Environ VL - 575 N2 - The electrochemical degradation of the fluoroquinolone antibiotic norfloxacin (NOR) on Ti/IrO2 anodes, in several aqueous matrices was evaluated. For this purpose, initially the performance and degradation routes of the technology at several pH values (3.0, 6.5, 7.5 and 9.0) and in the presence of some of the most common anions in real water matrices (Cl-, HCO3-, SO42- and NO3-) were determined. The results showed that the degradation of NOR can occur through both direct elimination at the electrode surface and mediated oxidation, via the electrogeneration of oxidative agents, such as active chlorine species and percarbonate ions, which come from chloride and bicarbonate oxidation, respectively. Conversely, nitrate ions showed to inhibit the efficiency of the system. Concerning the pH, the efficiency of the process in the presence of chloride ions followed the order: 9.0>7.5>6.5>3.0; showing a strong dependence of the NOR speciation, and being the anionic form of the antibiotic the more susceptible to be oxidized. Furthermore, the identification of three primary NOR by-products demonstrated that the initial attack of the active chlorine species, mainly HOCl, occurred at the secondary amine of the piperazine ring followed by chlorination of the benzene ring. The precedent findings were crucial to understand the efficiency of the technology to eliminate NOR in synthetic complex matrices such as seawater, municipal wastewater and urine. The electrochemical oxidation showed to be promissory to eliminate NOR, and its associated antimicrobial activity, in such complexes matrices. Waters at basic pH containing chloride or bicarbonate ions, such as seawater or municipal wastewater showed to be the most adapted to the application of the technology. Additionally, nitrate ions or urea, found in some matrices like fresh urine, reduce the efficiency of the process. SN - 1879-1026 UR - https://www.unboundmedicine.com/medline/citation/27720251/Elimination_of_the_antibiotic_norfloxacin_in_municipal_wastewater_urine_and_seawater_by_electrochemical_oxidation_on_IrO2_anodes_ L2 - https://linkinghub.elsevier.com/retrieve/pii/S0048-9697(16)32131-3 DB - PRIME DP - Unbound Medicine ER -