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Microwave‐induced degradation of nitrosamines trapped in zeolites
Author(s) -
Xu Jia Hui,
Zhou Yu,
Wen Jing Jia,
Wu Zheng Ying,
Zhou Chun Fang,
Zhu Jian Hua
Publication year - 2008
Publication title -
asia‐pacific journal of chemical engineering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.348
H-Index - 35
eISSN - 1932-2143
pISSN - 1932-2135
DOI - 10.1002/apj.176
Subject(s) - zeolite , chemistry , adsorption , dichloromethane , degradation (telecommunications) , microwave , amorphous solid , molecule , mesoporous material , chemical engineering , inorganic chemistry , catalysis , organic chemistry , telecommunications , physics , quantum mechanics , solvent , computer science , engineering
Abstract A new method is reported for the degradation of nitrosamines trapped by zeolites. Significant amount of N ‐nitrosodiphenylamine (NDPA) in dichloromethane solution, up to one‐third, could be degraded by microwave within 1 min once they were adsorbed by zeolite. The nitrosamine molecule, resulting from the electrostatic interaction between the NNO group of NDPA and the cation of zeolite, could be partially anchored inside the channel of zeolite depending on the degree of structure matching between the adsorbent and the adsorbate. Anchoring of nitrosamines limited their movement so that they were degraded by microwave irradiation. Mesoporous SBA‐15 and amorphous silica in solution could also promote the microwave‐induced degradation of NDPA, owing to the interaction between the surface SiOH and the NNO group of NDPA, and introducing copper oxide increased the conversion of NDPA. In addition, the influence of pore structure of zeolite on the microwave‐induced degradation of volatile nitrosamines was examined and discussed, and NaA exhibits a stronger adsorption than NaY for N ‐nitrosopyrrolidine (NPYR). Copyright © 2008 Curtin University of Technology and John Wiley & Sons, Ltd.