Eliminating carcinogenic pollutants in environment: reducing the tobacco specific nitrosamines level of smoke by zeolite-like calcosilicate.
Trapping carcinogens such as tobacco-specific nitrosamines (TSNA) in environmental tobacco smoke (ETS) is a challenge for the application of zeolite in environment protection because most TSNA exist in the particles whose size exceed the micropores of zeolites. In this paper, a new strategy to intercept the particles and to trap the TSNA in smoke by use of the porous calcosilicate material with fiber-like morphology plus two-dimensional eight-ring channel system is depicted and assessed. Owing to the specific fiber-like morphology and chemical composition, zeolite-like calcosilicate CAS-1 can effectively intercept the particles and thus reduces the TSNA level of mainstream smoke in the range of 30-60% once it is added into the cigarette filter, which is superior to zeolite NaA additive with the same amount. Moreover, the importance of morphology of zeolite-like porous materials on the adsorption of nitrosamines in smoke is reported for the first time.
Key Laboratory of Mesoscopic Chemistry of MOE, College of Chemistry & Chemical Engineering, Nanjing University, Nanjing, Jiangsu 210093, China.
Ling
L
Gao
Yi
Y
Cao
Shi Lu
SL
Zhou
Ting Ting
TT
Zhuang
Ying
Y
Wang
Jian Hua
JH
Zhu
D000327:Adsorption; D002273:Carcinogens / Q000302:isolation & purification*; D004785:Environmental Pollutants / Q000302:isolation & purification*; D009602:Nitrosamines / Q000302:isolation & purification*; D010316:Particle Size; D016062:Porosity; D017640:Silicates / Q000737:chemistry*; D012906:Smoke; D017641:Zeolites
D002273:Carcinogens; D004785:Environmental Pollutants; D009602:Nitrosamines; D017640:Silicates; D012906:Smoke; D017641:Zeolites