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Pumice-catalyzed ozonation degradation of p-chloronitrobenzene in aqueous solution

Paper ID Volume ID Publish Year Pages File Format Full-Text
46394 46438 2012 6 PDF Available
Title
Pumice-catalyzed ozonation degradation of p-chloronitrobenzene in aqueous solution
Abstract

The use of pumice for heterogeneous catalytic ozonation significantly enhances the degradation efficiency and the total organic carbon (TOC) removal of p-chloronitrobenzene (pCNB) in aqueous solution compared with ozonation alone because of the synergistic effect between ozone and the catalyst. The pCNB adsorption was too small to contribute significantly to the pCNB degradation during pumice-catalyzed ozonation. The decomposition rate of the aqueous ozone increased 1.374-fold in the presence of pumice. High pH also positively affected the pumice-catalyzed ozonation, as nearly uncharged surfaces (the solution pH was close to the point of zero charge) are favorable for catalytic pCNB ozonation. tert-Butanol remarkably decreases the removal efficiency of catalytic pCNB ozonation, which suggests that pCNB degradation follows the mechanism of hydroxyl radical oxidation. Increasing both the pumice and ozone concentrations enhanced the removal effectiveness of pCNB. Pumice is an efficient green catalyst for pCNB degradation in aqueous solution.

Graphical abstractFigure optionsDownload full-size imageDownload as PowerPoint slideHighlights► Natural pumice as catalyst for ozonation. ► Pumice-catalyzed ozonation degradation of pCNB in aqueous solution. ► Pumice enhances the efficiency of pCNB degradation. ► Pumice has a synergistic effect with ozone for pCNB degradation.

Keywords
Catalytic ozonation; p-Chloronitrobenzene; Pumice; Hydroxyl radical
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Pumice-catalyzed ozonation degradation of p-chloronitrobenzene in aqueous solution
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Publisher
Database: Elsevier - ScienceDirect
Journal: Applied Catalysis B: Environmental - Volumes 117–118, 18 May 2012, Pages 414–419
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Catalysis
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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
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Any Questions? feel free to contact us