| 초록 |
Organically modified clay was used to adsorb tetrachloroethylenefrom a gaseous phase. The organoclay was prepared by adsorbing hexadecyltrimethylammonium (HDTMA) on the surface of montmorillonite particles. tetrachloroethylene was adsorbed to the organoclay using a fixed adsorption bed. The adsorption was carried out at various inlet concentrations of gaseous tetrachloroethylene in a carrier gas (nitrogen). The adsorption behavior of tetrachloroethylene was investigated using natural clay as well as organoclay. Adsorption breakthrough curves were obtained, and the adsorption data were modeled with two adsorption isotherms. Desorption of tetrachloroethylene was also conducted using pure nitrogen, and the desorption profiles were fitted with a theoretical models. It was found that adsorption isotherms exhibited a favorable Type I behavior, which implies that the adsorption capacity is strongly dependent on vapor concentration at low concentration ranges. The temperature effect on the adsorption isotherm was also investigated. |
