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Catalytic degradation of tobacco-specific nitrosamines by ferric zeolite

Paper ID Volume ID Publish Year Pages File Format Full-Text
46011 46428 2013 8 PDF Available
Title
Catalytic degradation of tobacco-specific nitrosamines by ferric zeolite
Abstract

New strategy of using ferric zeolite ZSM-5 and Y to adsorb and catalytically degrade tobacco-specific nitrosamines (TSNA) is reported in this article. These zeolites were modified by both aqueous ion-exchange with FeSO4 solution and wet-impregnation of Fe(NO3)3, and characterized by XRD, UV–vis DRS, H2-TPR and temperature-programmed surface reaction (TPSR). Apart from laboratory tests, these samples were put into tobacco rods of cigarette to assess their real performance of reducing TSNA content in smoke, and the determination of TSNA was carried out by LC–MS/MS technique with the assistance of internal-standards. The ion-exchanged zeolites are more active than their impregnated analogs, and the ferric Y zeolite could selectively reduce 26% of total TSNA in mainstream smoke of Burley type tobacco. Catalytic breaking of the chemical bond in NNO group of nitrosamines by zeolite is the key step of decomposition of these carcinogens.

Graphical abstractFigure optionsDownload full-size imageDownload as PowerPoint slideHighlights► Ferric zeolite can catalyze the degradation of nitrosamines in tobacco smoke. ► Up to 26% of TSNAs is selectively removed in smoke for the first time. ► The state of ferric species and their catalytic function in zeolite are determined. ► Laboratorial TPSR test can screen the cig-catalyst candidates.

Keywords
Ferric zeolite; Tobacco-specific nitrosamines (TSNA); Ion-exchange and impregnation; Catalytic degradation; Cigarette-catalyst (cig-cat)
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Catalytic degradation of tobacco-specific nitrosamines by ferric zeolite
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Publisher
Database: Elsevier - ScienceDirect
Journal: Applied Catalysis B: Environmental - Volume 129, 17 January 2013, Pages 301–308
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