ADSORCIÓN DE COMPUESTOS ORGÁNICOS VOLÁTILES EN ARCILLAS DEL ESTADO DE PUEBLA, MÉXICO
Adsorption of volatile organic compounds (VOCs) of different adsorptives such as: benzene, toluene, p-xilene, carbon tetrachcloride, chlorobenzene, chloroform, n-hexane, n-heptane, n-octane and n-nonane on a clay specimen of the state of Puebla, México, labeled as NaBeCalite have beendetermined thro...
| Autores: | , , , , , , |
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| Tipo de recurso: | artículo |
| Estado: | Versión publicada |
| Fecha de publicación: | 2011 |
| País: | México |
| Institución: | UNIVERSIDAD NACIONAL AUTÓNOMA DE MÉXICO |
| Repositorio: | Revista Internacional de Contaminación Ambiental |
| Idioma: | español |
| OAI Identifier: | oai:ojs.pkp.sfu.ca:article/23593 |
| Acceso en línea: | https://www.revistascca.unam.mx/rica/index.php/rica/article/view/23593 |
| Access Level: | acceso abierto |
| Palabra clave: | VOCs Freundlich adsorption model VOCs isosteric heat of adsorption natural clay compuestos orgánicos volátiles modelo de adsorción de Freundlich calores isostéricos de adsorción arcilla natural |
| Sumario: | Adsorption of volatile organic compounds (VOCs) of different adsorptives such as: benzene, toluene, p-xilene, carbon tetrachcloride, chlorobenzene, chloroform, n-hexane, n-heptane, n-octane and n-nonane on a clay specimen of the state of Puebla, México, labeled as NaBeCalite have beendetermined through the gas chromatographic technique at different temperatures. The Freundlich adsorption model has been used to process all isotherm data in the ranges of temperatures studied.The isosteric heats of adsorption have been estimated through the Clausius-Clapeyron equation; these curves exhibit the following decreasing order with respect to the VOC adsorbed amount: (i) for cyclic compounds such as benzene, toluene and p-xylene (BTX compounds) the order is: p-xylene> toluene > benzene; (ii) for chloro compounds the corresponding sequence is chloroform > carbontetrachloride > chlorobenzene; (iii) finally for n-alkanes, the decreasing adsorption sequence is: nnonane > n-octane > n-heptane > n-hexane. These results indicate a selective adsorption of pxylene and n-nonane on NaBeCalite with respect to the remaining adsorptives. |
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