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Degradation studies of ciprofloxacin on a pillared iron catalyst

Paper ID Volume ID Publish Year Pages File Format Full-Text
48018 46488 2008 9 PDF Available
Title
Degradation studies of ciprofloxacin on a pillared iron catalyst
Abstract

Photo-assisted Fenton mineralization of ciprofloxacin (CFX), a broad-spectrum antibiotic used in human and veterinary medicine was studied using a modified laponite clay-based Fe nanocomposite (Fe-Lap-RD) as a heterogeneous catalyst in the presence of hydrogen peroxide and UV light. The catalytic performance has been monitored in terms of CFX (0.15 mM) and total organic carbon (TOC) conversions, whereas the catalyst stability was evaluated according to the metal leached from the solid structure into the aqueous solution. The Fe-Lap-RD was characterized by X-ray photoelectron spectroscopy (XPS) and inductively coupled plasma-atomic emission spectrometry (ICP-AES) techniques. Further, the effects of reaction parameters such as H2O2 concentration, Fe-Lap-RD catalyst loading and initial solution pH on the mineralization of CFX were investigated. It was found that at the optimal reaction conditions (60 mM H2O2, 1.0 g L−1 Fe-Lap-RD, initial solution pH 3.0), complete CFX degradation and over 57% total organic carbon (TOC) removal of CFX can be achieved after 30 min reaction. In addition degradation and mineralization kinetics of CFX was also studied to obtain apparent reaction rate constants. The photo-Fenton degradation of CFX follows the pseudo-first-order kinetics. Fe-Lap-RD exhibits good catalytic activity in the photodegradation and mineralization of CFX, with negligible leaching of Fe ions from the catalyst structure.

Keywords
Fe pillared clays; Photo-Fenton; Ciprofloxacin; Heterogeneous catalyst; Mineralization
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Publisher
Database: Elsevier - ScienceDirect
Journal: Applied Catalysis B: Environmental - Volume 83, Issues 1–2, 1 September 2008, Pages 15–23
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Catalysis
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