title: Simultaneous adsorption of a mixture of paraquat and dye by NaY zeolite covered with alkylsilane.
abstract: 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.
authors.affiliation: Ibnu Sina Institute for Fundamental Science Studies, Universiti Teknologi Malaysia, 81310 UTM Skudai, Johor, Malaysia.
authors.forename: Hadi
authors.initials: H
authors.lastname: Nur
authors.forename: Amir Faizal Naidu Abdul
authors.initials: AF
authors.lastname: Manan
authors.forename: Lim Kheng
authors.initials: LK
authors.lastname: Wei
authors.forename: Mohd Nazlan Mohd
authors.initials: MN
authors.lastname: Muhid
authors.forename: Halimaton
authors.initials: H
authors.lastname: Hamdan
mesh_terms: D000327:Adsorption; D010269:Paraquat; D014227:Triazines; D017641:Zeolites
chemical_list: D014227:Triazines; D017641:Zeolites; C012842:Cibacron Blue F 3GA; D010269:Paraquat