Abstract
The adsorption behaviour of some monochromophoric and bischromophoric styryl pyridinium dyes on polyethylene-glycol-treated silica have been investigated in an aqueous medium. The adsorption isotherms are analysed by using the Langmuir equation and the equation proposed by Gu and Zhu [Colloids Surf. 44 (1990) 81]. An adsolubilization-type phenomenon has been proposed for the adsorbate-adsorbent interaction.
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