Linear isotherms in multicomponent adsorption onto silica gel from organic solvents

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Abstract
The linearity and independence of adsorption isotherms of multiple trace components in the presence of a dominant adsorbate, previously found for activated carbon in water and in organic solvents, are also found for silica gel in organic solvents. The systems studied are as follows: (1) n-butyl alcohol, n-hexyl alcohol and n-octyl alcohol in cyclohexane solutions (0.1 and 0.3 mol dm–3) of ethyl alcohol and (2) n-amyl acetate, cyclohexanone and n-heptyl alcohol in carbon tetrachloride solutions (0.1 and 0.3 mol dm–3) of methyl ethyl ketone. Isotherms are reported for one, tow and three minor components. The results can be explained in terms of a Langmuir-type mixed-adsorption equation.

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