USO DE UNA ARCILLA ORGÁNICA COMO MATERIAL DE EMPAQUE DE UN FILTRO PARA DEPURAR AIRE CONTAMINADO CON TOLUENO

摘要

La capacidad de las arcillas orgánicas de adsorber compuestos orgánicos volátiles (VOCs) es debida al carácter hi-drofóbico generado cuando la arcilla natural es modificada con moléculas orgánicas. En el presente trabajo se empleó una arcilla natural mexicanaa a la cual se le intercaló cloruro de cetil piridina (CPC) obteniendo la organoarcilla OC-CPC, la cual se caracterizó por análisis infrarrojo, termogravimétrico y difracción de rayos X. La OC-CPC obtenida se empleó para adsorber tolueno y posteriormente se trató a 120, 150 y 200℃.%The adsorption capacity of organoclays for organic compounds (VOCs) is due to the hydrophobic properties generated when the natural clay is modified with organic molecules. In the present work, an organoclay (OC-CPC) was prepared using a Mexican natural clay by intercalating a cetyl pyridine chloride (CPC). It was characterized by infrared, thermogravi-metric, and X-ray diffraction analysis. The OC-CPC was used to adsorb toluene and then treated at 120, 150, and 200℃ during 4, 8, and 12h in order to regenerate its adsorption capacity. The minimum requirements for recovery obtained were 120℃ during 4h, with a 90% recovery of its adsorption capacity. The OC-CPC was used as packing material of a filter to purify contaminated environments with toluene. The results showed that organoclay can reduce toluene content at concentrations below the permissible limit (MPL) of 50mg·l~(-1).