Journal
WATER RESEARCH
Volume 35, Issue 14, Pages 3357-3366Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/S0043-1354(01)00056-2
Keywords
basic dye; activated carbon; natural zeolite; homogeneous diffusion model; external mass transfer resistance
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The adsorption of basic dyes from aqueous solution onto granular activated carbon and natural zeolite has been studied using an agitated batch adsorber. The influence of agitation, initial dye concentration and adsorbent mass has been studied. The parameters of Langmuir and Freundlich adsorption isotherms have been determined using the adsorption data. Homogeneous diffusion model (solid diffusion) combined with external mass transfer resistance is proposed for the kinetic investigation. The dependence of solid diffusion coefficient on initial concentration and mass adsorbent is represented by the simple empirical equations. (C) 2001 Elsevier Science Ltd. All rights reserved.
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