Liquid adsorption of tobacco specific N-nitrosamines by zeolite and activated carbon
Liquid adsorption of tobacco specific N-nitrosamines by zeolite and activated carbon
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DOI：
10.1016/j.micromeso.2014.08.057
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发表时间：
2014-12
影响因子：
5.2
通讯作者：
X. Sun;W. Lin;Lei-jun Wang;Bo Zhou;Xiao-Lin Lv;Ying Wang;Sai-jing Zheng;Wei-miao Wang;Yi-gang T
中科院分区：
文献类型：
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作者：
X. Sun;W. Lin;Lei-jun Wang;Bo Zhou;Xiao-Lin Lv;Ying Wang;Sai-jing Zheng;Wei-miao Wang;Yi-gang T
为控制吸烟引起的烟草特有亚硝胺（TSNA）污染，采用液相色谱-串联质谱（LC-MS/MS）技术，系统研究了改性活性炭、沸石等多孔材料对烟草提取液中TSNA的液相吸附。考察了固液比、吸附剂的孔结构和表面酸碱性对液相吸附的影响。在酸浸、离子交换和浸渍改性的活性炭中，ZnAC对TSNA的去除率可达73%，是一种经济有效的工业化吸附剂。CaA沸石对烟草溶液中TSNA的吸附率也超过40%，并考察了阳离子对沸石吸附TSNA的影响以及对NNN、NAT和NNK等TSNA组分的选择性。此外，还对TSNA液相吸附的最佳微环境的制备进行了探索。
In order to control the tobacco specific nitrosamines (TSNA) pollution caused by smoking, liquid adsorption of TSNA in tobacco-extract solution by modified activated carbon, zeolites and other porous materials was systemically studied with the monitor of Liquid Chromatography–Tandem Mass Spectrometry (LC–MS/MS) technique. The effect of solid–liquid ratio, the porous structure and surface acidic-basicity of sorbent on the liquid adsorption was assessed. Among various activated carbon (AC) samples modified with acid soak, ion-exchange or impregnation, the impregnated sorbent ZnAC could remove 73% of the TSNA in the solution, offering a cost-effective candidate for potential industrial application. Zeolite CaA was also efficient to trap more than 40% of TSNA in tobacco solution, and the influence of cation on the adsorption of TSNA by zeolite and the possible selectivity for the components of TSNA such as NNN, NAT and NNK were carefully examined. Besides, the fabrication of optimal micro-environment for liquid adsorption of TSNA was explored.