Nur, Hadi and Manan, Amir Faizal Naidu Abdul and Wei, Lim Kheng and Muhid, Mohd Nazlan Mohd and Hamdan, Halimaton (2005) Simultaneous adsorption of a mixture of paraquat and dye by NaY zeolite covered with alkylsilane. Journal of Hazardous Materials, 117 (1). pp. 35-40. ISSN 0304-3894
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Official URL: http://dx.doi.org/10.1016/j.jhazmat.2004.07.015
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.
|Uncontrolled Keywords:||Paraquat, blue dye, alkylsilylation, NaY zeolite|
|Subjects:||T Technology > TP Chemical technology|
|Divisions:||Chemical and Natural Resources Engineering (Formerly known)|
|Deposited By:||Maznira Sylvia Azra Mansor|
|Deposited On:||02 Jan 2009 03:38|
|Last Modified:||02 Jan 2009 03:38|
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