Significant reduction of carcinogenic compounds in tobacco smoke by the use of zeolite catalysts
Significant reduction of carcinogenic compounds in tobacco smoke by the use of zeolite catalysts
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DOI：
10.1016/s1387-1811(99)00162-6
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发表时间：
1999-12
影响因子：
5.2
通讯作者：
W.M Meier;K. Siegmann
中科院分区：
文献类型：
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作者：
W.M Meier;K. Siegmann
沸石在毒理学和生命科学中发挥着越来越重要的作用。一个新的例子是从香烟烟雾中去除大量的致癌化合物。众所周知，这些化合物，特别是亚硝胺和多环芳烃(PAHs)构成了严重的健康风险。在减少有毒化合物方面最有效的是直接放置在烟草上的沸石催化剂。当沸石催化剂被燃烧的香烟中的热区接近时被激活，那里的温度约为800°C。在亚硝胺中，约40%至50%可从主流(吸烟者吸入)中消除，约50%至70%从侧流(两次喷雾之间形成的烟雾)中消除。对于多环芳烃，使用Y型分子筛可以观察到形状选择性。有了这些沸石，尼古丁水平在主流中几乎不受影响，而在侧流中则明显降低。
Zeolites play an increasingly important role in toxicology and the life sciences. A new example is the removal of significant amounts of carcinogenic compounds from cigarette smoke. These compounds, particularly nitrosamines and polycyclic aromatics (PAHs), are well known to constitute a serious health risk. Most effective in reducing toxic compounds are zeolite catalysts placed directly on the tobacco. The zeolite catalysts are activated when they are approached by the hot zone in the burning cigarette, where temperatures reach around 800°C. Of the nitrosamines some 40 to 50% can be eliminated from the mainstream (inhaled by smokers), and around 50 to 70% from the sidestream (the smoke formed in between puffs). In the case of polycyclic aromatics, shape selectivity could be observed when using Y-type zeolites. With these zeolites nicotine levels remain practically unaffected in the mainstream and are distinctly reduced in the sidestream.