The surfaces of NaY
zeolite particles were modified by the alkylsilylation of n-octadecyltrichlorosilane (OTS). Two kinds of modified NaY zeolites were prepared; one with its external surface partially and the other fully covered with alkylsilyl groups. Since the size of OTS is bigger than the
pore diameter of NaY, it is attached on the external surface, leaving the
internal pore accessible to adsorbate molecules. As a result of alkylsilylation, the
adsorption properties of these sorbents were improved. The adsorption properties of these materials were tested by their reaction in a mixture of
paraquat and blue dye. The results demonstrate that the alkysilylated NaY materials are capable of
simultaneous adsorption of paraquat and blue dye. Paraquat was selectively adsorbed into the internal pore of the zeolite whereas the
dye on the externally attached alkylsilyl groups of the sorbent; displaying the unique bimodal amphiphilic character of the alkylsilylated NaY zeolites.
More abstracts about the Simultaneous adsorption of a mixture of paraquat and dye by NaY zeolite covered with alkylsilane