Water Science & Technology Vol 66 No 2 pp 247–253 © IWA Publishing 2012 doi:10.2166/wst.2012.073

Silicalite-1, an adsorbent for 2-, 3-, and 4-chlorophenols

N. A. Sánchez-Flores, M. Solache, M. T. Olguín, J. Legaspe, G. Pacheco-Malagón, J. M. Saniger, E. Martinez, S. Bulbulian and J. J. Fripiat

The adsorption of the three chlorophenol isomers, ortho, meta and para, by silicalite-1 has been studied at 30 °C, below the solubility (at the same temperature) in water. Large differences, up to 30 times, have been observed between the adsorption of the para- vs. the ortho-isomer. The difference of behavior observed between the isomers is assigned to the tendency to self-organization of the para-isomer. It seems probable that the adsorption sites are at the intersection channels. From a technical point of view, silicalite-1 seems a competitive adsorbent for p-chlorophenol.

Keywords: dipole moment; m-chlorophenol; o-chlorophenol; p-chlorophenol; silicalite-1

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