Capturing Volatile Nitrosamines in Gas Stream by Zeolites: Why and How
Capturing Volatile Nitrosamines in Gas Stream by Zeolites: Why and How
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DOI：
10.1021/jp067474q
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发表时间：
2007-02
影响因子：
3.7
通讯作者：
Chunfang Zhou;Yi Cao;T. Zhuang;Wei Huang;J. Zhu
中科院分区：
文献类型：
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作者：
Chunfang Zhou;Yi Cao;T. Zhuang;Wei Huang;J. Zhu
针对沸石在环境保护中的潜在应用，采用气相色谱法研究了沸石对气流中挥发性亚硝胺的瞬时吸附。选择三种挥发性亚硝胺，n -亚硝基二甲胺，n -亚硝基soprolidine和n -亚硝基六亚甲基亚胺作为吸附剂。考察了吸附温度、气流流速和混合亚硝胺对沸石吸附的影响。此外，亚硝胺类化合物的吸附等温线首次符合Freundlich方程。在常温条件下，NaY沸石对含侧烟的烟气中亚硝胺的捕获能力最高，是环境保护和公共卫生的有效候选材料。
For potential application of zeolite in environmental protection, the instantaneous adsorption of volatile nitrosamines in gas stream by zeolites was studied by a gas chromatography technique. Three volatile nitrosamines, N-nitrosodimethylamine, N-nitrosopyrrolidine, and N-nitrosohexamethyleneimine, were chosen as adsorbates. The influence of adsorption temperature, flow rate of gas stream, and the mixed nitrosamines on the adsorption of zeolites was examined. Furthermore, the adsorption isotherms of nitrosamines were fitted with the Freundlich equation for the first time. Zeolite NaY showed the highest capacity to capture the nitrosamines in the gas stream containing sidestream smoke from cigarettes at ambient temperature, providing an efficient candidate for protection of environment and public health.