The adsorption of aromatic compounds by smectite exchanged with tetramethylammonium (TMA) has been studied. Aromatic compounds adsorbed by TMA-smectite are assumed to adopt a tilted orientation in a face-to-face arrangment with the TMA tetrahedra. The sorptive characteristics of TMA-smectite were influenced strongly by the presence of water. The dry TMA-smectite showed little selectivity in the uptake of benzen, toluene and xylene. In the presence of water, TMA-smectite showed a high degree of selectivity based on molecular size/shape, resulting in high uptake of benzene and progressively lower uptake of larger aromatic molecules. This selectivity appeared to result from the shrinkage of interlamellar cavities by water.
|頁（從 - 到）||2953-2962|
|期刊||Journal of the Chemical Society, Faraday Transactions 1: Physical Chemistry in Condensed Phases|
|出版狀態||Published - 1989 12月 1|
All Science Journal Classification (ASJC) codes
- 化學 (全部)