SORPTION OF CONGO RED ON CELLULOSE

The adsorption of Congo Red from aqueous solutions onto cellulose and cotton fibres has been carried out to investigate `Sorption'. Both sub strates were given various treatments and the effect of such treatment s was examined towards sorption. Two types of isotherms were observed namely, H- and S-type. A more specific form `HA' leading to 'flatewise ' adsorption on cotton was identified. The electrolytes strongly influ ence the sorption capacity of Congo Red on both fibres which is interp reted on the basis of Donnan Theory.