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Photocatalytic degradation of β-blockers by using immobilized titania/silica on glass slides

Paper ID Volume ID Publish Year Pages File Format Full-Text
26703 43972 2015 10 PDF Available
Title
Photocatalytic degradation of β-blockers by using immobilized titania/silica on glass slides
Abstract

•The immobilized photocatalyst on the glass slides was prepared.•Two types of commercial nanoparticles of titanium dioxide were compared.•Evonik Degussa P25 showed better photocatalytic activity than P90.•All five β-blockers were completely eliminated during photocatalytic treatment.•Intermediates were identified mostly as hydroxylation or cleavage products.

Photocatalytic degradation of five β-blockers (acebutolol, atenolol, metoprolol, nadolol and propranolol) was investigated in aqueous media using immobilized TiO2 as a photocatalyst. The analyzed parameters were pharmaceutical removal and non purgeable organic carbon. Two different types of photocatalyst incorporated in sol–gel matrix were compared; P25 exhibited a higher photocatalytic activity compared to P90 (both from Evonik Degussa). Besides, optimal photocatalyst concentration and light intensity were determined. According to the results obtained, after 120 min of treatment a complete removal was achieved for all compounds (initial concentration 25 mg/L) using P25. After 240 min of irradiation a mineralization degree ranged from 75% for acebutolol to 92% for propranolol. A longer illumination time was needed for complete removal of β-blockers in river water. Main intermediate compounds were identified by high performance liquid chromatography coupled to mass spectrometry (HPLC–MS/MS) technique.

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Keywords
ACE, acebutolol; ATE, atenolol; MET, metoprolol; NAD, nadolol; PRO, propranololβ-Blockers; Photocatalysis; Titanium dioxide; Immobilization; Glass slides
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Publisher
Database: Elsevier - ScienceDirect
Journal: Journal of Photochemistry and Photobiology A: Chemistry - Volume 305, 1 June 2015, Pages 19–28
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