Catalytic degradation of tobacco-specific nitrosamines by ferric zeolite

Wei Gang Lin, Yu Zhou, Fang Na Gu, Shi Lu Zhou, Jian Hua Zhu

Research output: Contribution to journalArticlepeer-review

25 Scopus citations

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.

Original languageEnglish
Pages (from-to)301-308
Number of pages8
JournalApplied Catalysis B: Environmental
Volume129
DOIs
StatePublished - 7 Jan 2013
Externally publishedYes

Keywords

  • Catalytic degradation
  • Cigarette-catalyst (cig-cat)
  • Ferric zeolite
  • Ion-exchange and impregnation
  • Tobacco-specific nitrosamines (TSNA)

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