fulltext.study @t Gmail

Photocatalytic decomposition of pharmaceutical ibuprofen pollutions in water over titania catalyst

Paper ID Volume ID Publish Year Pages File Format Full-Text
46042 46428 2013 10 PDF Available
Title
Photocatalytic decomposition of pharmaceutical ibuprofen pollutions in water over titania catalyst
Abstract

Due to the growing importance of low concentrated pollution of surface, ground and drinking, the photocatalytic decomposition of ibuprofen down to low ppm concentrations over titania catalyst has been investigated in detail. The catalyst was characterized by XRD, TEM, diffuse reflection UV–Vis and nitrogen adsorption measurement. The photocatalytic abatement of ibuprofen was monitored by UV–Vis spectrometry, chromatographic by GC/MS, and HPLC coupled electrospray ionization time-of-flight mass spectrometry (ESI-TOF-MS). Catalytic performance has been studied by varying the catalyst and substrate concentration as well as decreasing the catalyst-to-substrate mass ratio over a wide range. The photocatalytic treatment with titania catalyst leads to rapid mineralization of ibuprofen. Formation of intermediate reaction products has been investigated. It is proposed that intermediates in part form oligomeric species, which are responsible for catalyst poisoning. Additional, the influence of the pH value, oxygen supply and catalyst re-use have been checked.

Graphical abstractFigure optionsDownload full-size imageDownload as PowerPoint slideHighlights► The photocatalytic decomposition of ibuprofen over TiO2 was studied at low concentration. ► IBP and catalyst concentration and catalyst-to-substrate ratio were varied over a wide range. ► Rapid depollution under UV–Vis light is accompanied by formation of temporary by-products. ► ESI-TOF-MS analysis points to the formation of recalcitrant oligomeric intermediates. ► Re-use experiments show catalyst poisoning and increase of reaction intermediates.

Keywords
Photocatalytic degradation; Ibuprofen; Pharmaceutical; Titania; Reaction intermediates; Oligomerization
First Page Preview
Photocatalytic decomposition of pharmaceutical ibuprofen pollutions in water over titania catalyst
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
Publisher
Database: Elsevier - ScienceDirect
Journal: Applied Catalysis B: Environmental - Volume 129, 17 January 2013, Pages 589–598
Authors
, , , , , ,
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