Rate of intraparticle diffusion was studied for adsorption of two basic dyes, basic red and basic yellow, on particles of palm fruit bunch. The rate process was expressed in terms of square root of time (t0.5). Discussion of the obtained relationship of equilibrium isotherm and t0.5 was given. The intraparticle rate diffusion “k” was determined experimentally and the correlation at different dye concentrations and different temperatures was found to follow the form: k = A (variable )B. The adsorption process was found to be a diffusion controlled process.

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