fulltext.study @t Gmail

Sonophotocatalytic mineralization of antipyrine in aqueous solution

Paper ID Volume ID Publish Year Pages File Format Full-Text
46239 46435 2013 8 PDF Available
Title
Sonophotocatalytic mineralization of antipyrine in aqueous solution
Abstract

•The UV/H2O2/Fe/US process is an alternative for mineralization of antipyrine.•92% of TOC is removed after 50 min.•Antipyirine photodegradation proceeds mainly through a radical mechanism.•Important synergistic effect (45.3%) between sonolysis and photoFenton.

The mineralization of aqueous solutions of antipyrine, an emerging contaminant, using an innovative homogeneous sono-photocatalytic oxidation process (H2O2/UV/Fe/Ultrasound) was evaluated in an artificial UV lamp.At the selected operation conditions [H2O2] = 1500 ppm, pH = 2.7, amplitude = 100%, pulse length (cycles) = 0.3 during 15 min and then 1, 92% of TOC is removed after 50 min treating an aqueous solution containing 50 ppm of antipyrine. An important synergistic effect between sonolysis and photoFenton (UV/H2O2/Fe) of 45.4% was quantified using the first order rate constants for TOC.Comparison experiments of scavenger-loaded conditions demonstrate that the antipyirine photodegradation proceeds mainly through a radical mechanism probably beginning by the cleavage of the NN bond of penta heterocycle leading to the formation of aromatic acids (anthranilic and 1,4-benzenedicarboxylic acids) then followed by the opening of phenyl ring to form small molecular organic acids (mainly 2-butenedioic, 4-oxo-pentanoic and butanedioic acids), which may be decomposed further into CO2.

Graphical abstractFigure optionsDownload full-size imageDownload as PowerPoint slide

Keywords
ECs, emerging contaminants; km, mineralization rate constant; NNs, neural networks; TOC, total organic carbon; US, ultrasound; US EPA, United States-Environmental Protection Agency; UV, ultraviolet; WWTPs, wastewater treatment plantsEmerging contaminant;
First Page Preview
Sonophotocatalytic mineralization of antipyrine in aqueous solution
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 - Volumes 138–139, 17 July 2013, Pages 318–325
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