Hierarchical functionalized MCM-22 zeolite for trapping tobacco specific nitrosamines (TSNAs) in solution.
To enable zeolite to trap bulky environment pollutants such as tobacco specific nitrosamines (TSNAs), we tailored the porous structure of MCM-22 zeolite by desilication to obtain a sample with mesopores centered 3.5 nm, in order to promote the mass transport. The meso-MCM-22 was further functionalized with -SO(3)H group to enhance the efficiency in adsorption of TSNAs. The composites were characterized by XRD and BET methods, and their adsorptive function was assessed in both liquid adsorption of N'-nitrosonornicotine (NNN) and the adsorption of TSNAs in aqueous tobacco-extract solution. Grafting -SO(3)H group on alkaline-treated MCM-22 significantly elevated the adsorption toward nitrosamines, and the resulting composite could reduce above 70% of NNN in dichloromethane solution or 54% of TSNAs in tobacco-extract solution.
Yang
Jing
J
Key Laboratory of Mesoscopic Chemistry of MOE, School of Chemistry and Chemical Engineering, Nanjing University, 22 Hankou Road, Gu-lou, Nanjing 210093, Jiangsu, China.
Yang
Jia Yuan
JY
Zhou
Yu
Y
Wei
Feng
F
Lin
Wei Gang
WG
Zhu
Jian Hua
JH
D000327:Adsorption; D002273:Carcinogens / Q000302:isolation & purification*; D003460:Crystallization; D005750:Gastric Juice / Q000737:chemistry; D006801:Humans; D007202:Indicators and Reagents; D008855:Microscopy, Electron, Scanning; D009602:Nitrosamines / Q000302:isolation & purification*; D016062:Porosity; D014026:Nicotiana / Q000737:chemistry*; D014961:X-Ray Diffraction; D017641:Zeolites / Q000737:chemistry*
D002273:Carcinogens; D007202:Indicators and Reagents; D009602:Nitrosamines; D017641:Zeolites