1. Adsorption of Low-Molecular-Weight Amines in Aqueous Solutions to Zeolites: An Approach to Impeding Low-Molecular-Weight Amines from Regenerating N-Nitrosamines
- Author
-
Xiaoyan Guo, Qilin Li, Qixing Zhou, Wanli Hu, Man Zhang, Huaiqi Shao, Chunyu Li, Shougang Fan, and Hailan Yun
- Subjects
chemistry.chemical_classification ,Diethylamine ,Aqueous solution ,General Chemical Engineering ,Inorganic chemistry ,Aromatic amine ,General Chemistry ,010501 environmental sciences ,010402 general chemistry ,01 natural sciences ,Industrial and Manufacturing Engineering ,0104 chemical sciences ,chemistry.chemical_compound ,Adsorption ,Aniline ,chemistry ,Organic chemistry ,Ethylamine ,Zeolite ,Dimethylamine ,0105 earth and related environmental sciences - Abstract
The combined effects of the porous structure, acidity, and ion-exchange properties of zeolites and the structures of the degradation products of nitrosamines in aqueous solution on adsorption were evaluated. The degradation products of nitrosamines including the aliphatic low-molecular-weight amines methylamine, dimethylamine, ethylamine, and diethylamine and the aromatic amine aniline all exhibited significant adsorption affinities to HZSM-5 zeolites, and aliphatic low-molecular-weight amines exhibited much greater adsorption affinities to HY zeolite than to NaY and HZSM-5 zeolites, but aromatic amines exhibited little adsorption affinity to HY and NaY zeolites. The results of the pH-dependency experiments further indicated that the acidity and polarity of the adsorbates and the acidity of the adsorbents play a combinational role in determining the significance of the adsorption interactions between low-molecular-weight amines in aqueous solution and zeolites. We propose that the acid–base and electrosta...
- Published
- 2017