Insight into the efficient TSNA capturer derived from zeolite Hβ

[Display omitted] •Zeolite Hβ self-activated in regeneration.•Regenerated Hβ adsorbed more TSNA to 220 μg g−1.•Calcination of Hβ adsorbed TSNA did not form VNA.•Zeolite NTY can replace Hβ in adsorption of TSNA.•MCM-22 adsorbs NNK efficiently in water. The thermal regeneration of zeolite Hβ adsorbed...

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Bibliographic Details
Published in:	Chemical engineering journal (Lausanne, Switzerland : 1996) Switzerland : 1996), 2019-08, Vol.369, p.480-488
Main Authors:	Shi, Chun Ling, Chen, Jie Ling, Gao, Yi Han, Wang, Yang Zhong, Sun, Xiao Dan, Qi, Da Wei, Zheng, Sai Jing, Shen, Yi, Wang, Ying, Zhu, Jian Hua
Format:	Article
Language:	eng
Subjects:	Environmental protection Impact of zeolite pore size Liquid adsorption of TSNA Regeneration of zeolite Hβ Selective adsorption
Online Access:	Get full text
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Summary:	[Display omitted] •Zeolite Hβ self-activated in regeneration.•Regenerated Hβ adsorbed more TSNA to 220 μg g−1.•Calcination of Hβ adsorbed TSNA did not form VNA.•Zeolite NTY can replace Hβ in adsorption of TSNA.•MCM-22 adsorbs NNK efficiently in water. The thermal regeneration of zeolite Hβ adsorbed tobacco specific nitrosamines (TSNA) along with the impact of zeolitic pore size on the liquid adsorption of TSNA were investigated in this article for the first time. After calcination at 873 K, the regenerated Hβ zeolite exhibited a kind of self-activation to trap more TSNA in succeeding adsorption in tobacco solution, achieving the high capacity of 225 μg g−1. With the assistance of TG-MS technique, it was clear that no secondary pollution of volatile nitrosamines (VNA) occurred in the regeneration of Hβ zeolite. In order to seek cheap TSNA-capturer, three zeolites with different pore structures, Hβ, MCM-22 and NTY (the dealuminated NaY) zeolites were assessed in the TSNA adsorption in laboratory formulated surface water and tobacco solution to examine the influence of pore size. MCM-22 was the excellent selective sorbent of 4-methylnitrosamino-1-3-pyridyl-1-butanone (NNK), but its channels were easily clogged in tobacco solution. Zeolite Hβ showed a prominent TSNA adsorption in both solutions due to its pore size of 0.6–0.7 nm. The cheap zeolite NTY with the pore size of 0.74 nm exhibited a high adsorption capability of TSNA similar to Hβ in tobacco solution, making it a promising replacement for industrial applications.
ISSN:	1385-8947 1873-3212