Trapping and degradation of volatile nitrosamines on cyclodextrin and zeolites

• DOI: 10.1016/j.micromeso.2004.07.025
• Publication Date: 2004-09-30T15:17:41Z
• Authors: Ying Wang; Shi-lu Zhou; Jia-rong Xia; Jun Xue; Jia-hui Xu; Jian-hua Zhu
• Keywords: 02 engineering and technology; 0210 nano-technology

Abstract The adsorption and thermal degradation of volatile nitrosamines on cyclodextrins have been investigated for the first time. Cyclodextrins can selectively adsorb nitrosamines to form host–guest complex but the adsorption model differs from that on zeolite. When nitrosamine is enclosed into cyclodextrin, the alkyl group is trapped into the wider rim of cavity and the oxygen in –N–N O group of nitrosamine bonds to the HO-group of the host through establishment of hydrogen bond. The temperature programmed surface reaction (TPSR) and TG-DTA results indicate no desorption of nitrosamines but formation of nitrogen in the degradation of nitrosamines trapped in cyclodextrin, which are very important and valuable for removal of the carcinogen.