Macrolide antibiotics removal using a circulating TiO2-coated paper photoreactor: parametric study and hydrodynamic flow characterization

The present work investigates the photocatalytic degradation efficiency of biorecalcitrant macrolide antibiotics in a circulating tubular photoreactor. As target pollutants, spiramycin (SPM) and tylosin (TYL) were considered in this study. The photoreactor leads to the use of an immobilized titanium...

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Bibliographic Details
Published in:Water science and technology 2016-05, Vol.73 (11), p.2627-2637
Main Authors: Ounnar, Amel, Bouzaza, Abdelkrim, Favier, Lidia, Bentahar, Fatiha
Format: Article
Language:English
Subjects:
Anti-Bacterial Agents - chemistry
Antibiotics
Catalysis
Catalysts
Chemical engineering
Chemical Sciences
Constants
Degradation
Electric Power Supplies
Energy consumption
Environmental Engineering
Environmental Sciences
Flow rates
Flow velocity
Hazardous materials
Hydrodynamics
Irradiation
Macrolide antibiotics
Macrolides - chemistry
Mineralization
Models, Chemical
Organic carbon
Oxidation
Parametric statistics
Pharmaceutical industry
Photocatalysis
Photodegradation
Photolysis
Pilot Projects
Pollutants
Removal
Residence time
Residence time distribution
Reuse
Spiramycin
Studies
Suspended particulate matter
Titanium
Titanium - chemistry
Titanium dioxide
Total organic carbon
Tylosin
Ultraviolet radiation
Ultraviolet Rays
Water Pollutants, Chemical - chemistry
Water Purification - methods
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Summary:The present work investigates the photocatalytic degradation efficiency of biorecalcitrant macrolide antibiotics in a circulating tubular photoreactor. As target pollutants, spiramycin (SPM) and tylosin (TYL) were considered in this study. The photoreactor leads to the use of an immobilized titanium dioxide on non-woven paper under artificial UV-lamp irradiation. Maximum removal efficiency was achieved at the optimum conditions of natural pH, low pollutant concentration and a 0.35 L min(-1) flow rate. A Langmuir-Hinshelwood model was used to fit experimental results and the model constants were determined. Moreover, the total organic carbon analysis reveals that SPM and TYL mineralization is not complete. In addition, the study of the residence time distribution allowed us to investigate the flow regime of the reactor. Electrical energy consumption for photocatalytic degradation of macrolides using circulating TiO2-coated paper photoreactor was lower compared with some reported photoreactors used for the elimination of pharmaceutic compounds. A repetitive reuse of the immobilized catalyst was also studied in order to check its photoactivity performance.
ISSN:0273-1223
1996-9732
DOI:10.2166/wst.2016.096