沸石在去除卷烟烟气中亚硝胺的应用

吸烟污染;沸石;添加剂;沸石在去除卷烟烟气中亚硝胺的应用

Removal of N-Nitrosamine from Cigarette Smoke by Zeolite

The N nitrosamine content in smoke of different brand cigarettes has been examined as function of the content of tar and nicotine in cigarettes. The results show that the content of N nitrosamine in the side stream of burning cigarette gas was not seriously related to the content of tar or nicotine. Therefore it is inefficient to decrease tar content in the cigarette for absolute removal of N nitrosamine from the smoke, even when the content of tar was lowered to 1 mg/per cigarette. A new way to remove N nitrosamine from the smoke of cigarette is proposed based on the fact that N nitrosamine can be selectively adsorbed and/or catalytic degraded by zeolites. The GC MS results revealed the influence of adding manner of zeolite on the removal of N nitrosamine from cigarette smoke. Much more carcinogenic compounds in the smoke could be adsorbed when the zeolite was dispersed in tobacco instead of putting in filter. About 30% of tobacco specific N nitrosamine(TSNA) could be eliminated from side stream, meanwhile 35%~61% of the TSNA disappeared in the main stream by use of zeolite like materials such as NaY and NaZSM 5 additive in the tobacco. About 50% of the total amount of N nitrosamine were found to be removed from the side stream of cigarette when the mass fraction of the additive was less than 5%. For the main stream, about 70% of the N nitrosamine could be removed in the case of spraying zeolite on the tobacco.