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Adsorption of Nitrosamines by Mesoporous Zeolite

Adsorption of Nitrosamines by Mesoporous Zeolite

Wei Gang Lin, Feng Wei, Fang Na Gu, Xin Dong, Ling Gao, Ting Ting Zhuang, Ming Bo Yue, Jian Hua Zhu

J Colloid Interface Sci. 2010 Aug 15;348(2):621-7.

PMID: 20621826

Abstract:

On the basis of a study of the adsorption of zeolite and mesoporous silica, we attempted to create a hierarchical structure in the new nitrosamines trapper. Thus, mesoporous HZSM-5 zeolite was fabricated through impregnating a structure-directing agent into the as-synthesized MCM-41 followed by dry-gel conversion to transform amorphous silica to zeolite crystal. The texture of mesoporous ZSM-5 was tailored by adjusting the Si/Al ratio in the MCM-41 source and the thermal treatment time. The resulting samples were characterized by N(2) adsorption to evaluate their textural properties. One volatile nitrosamine, N-nitrosopyrrolidine (NPYR), was used as probe molecule in instantaneous adsorption to survey the function of the resulting composites. Adsorptions of N'-nitrosonornicotine (NNN) in dichloromethane solution and tobacco-specific nitrosamines (TSNA) in tobacco-extract solution were also utilized for the same purpose. As expected, mesoporous zeolite exhibits a good adsorption capacity in laboratory tests, superior to either microporous zeolite or mesoporous silica, providing a valuable candidate for controlling nitrosamines in the environment.

Chemicals Related in the Paper:

Catalog Number	Product Name	Structure	CAS Number	Price
AP16543558	(±)-N′-Nitrosonornicotine (NNN) solution		16543-55-8	Price

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