Shape-selective adsorption of aromatic molecules from water by tetramethylammonium-smectite

Lee, J.; Mortland, M. M.; Boyd, S. A.; Chiou, C. T.

Abstract:

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.

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Article

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70015453

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Lee, J.; Mortland, M. M.; Boyd, S. A.; Chiou, C. T.

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2962

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English

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Journal of the Chemical Society, Faraday Transactions 1: Physical Chemistry in Condensed Phases

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Shape-selective adsorption of aromatic molecules from water by tetramethylammonium-smectite; 1989; Article; Journal; Journal of the Chemical Society, Faraday Transactions 1: Physical Chemistry in Condensed Phases; Lee, J.; Mortland, M. M.; Boyd, S. A.; Chiou, C. T.