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Degradation of ciprofloxacin by UV/S2O82− process in a large photoreactor

Paper ID Volume ID Publish Year Pages File Format Full-Text
25901 43917 2014 6 PDF Available
Title
Degradation of ciprofloxacin by UV/S2O82− process in a large photoreactor
Abstract

•An effective degradation of ciprofloxacin using UV/S2O82− process was achieved.•SO4− was a predominant radical in UV/S2O82− process.•This study provides a novel treatment of wastewater contaminated with ciprofloxacin.

This study evaluates the effectiveness of the UV/S2O82− process in the degradation of ciprofloxacin in aqueous solutions without adjusting their pH using a large photoreactor. The effect of Na2S2O8 concentration on the efficiency of degradation of ciprofloxacin was examined. A larger Na2S2O8 concentration was associated with a higher efficiency of degradation of ciprofloxacin. However, excessive Na2S2O8 concentration inhibited the degradation of ciprofloxacin. UV/S2O82− process exhibited pseudo-first-order kinetics. SO4− was detected by performing quenching studies using specific alcohols, revealing that SO4− was found to be the predominant radical. Additionally, the presence of HCO3− inhibited the degradation of ciprofloxacin at a high concentration. An efficiency of degradation of ciprofloxacin was 95% within 30 min using an Na2S2O8 concentration of 1.92 g/L in the absence of inorganic anions. Comparison of both UV/S2O82− and heat/S2O82− processes demonstrates that the degradation of ciprofloxacin at ambient temperature can be enhanced by the UV/S2O82− process, leading to a reduced operating time. These promising results obviously reveal the potential of the UV/S2O82− process application for the effective degradation of ciprofloxacin in aqueous solutions without adjusting the pH.

Keywords
Degradation; Ciprofloxacin; UV; Persulfate
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Publisher
Database: Elsevier - ScienceDirect
Journal: Journal of Photochemistry and Photobiology A: Chemistry - Volume 285, 1 July 2014, Pages 1–6
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Bioengineering
Get Full-Text Now
Don't Miss Today's Special Offer
Price was $35.95
You save - $31
Price after discount Only $4.95
100% Money Back Guarantee
Full-text PDF Download
Online Support
Any Questions? feel free to contact us