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Kinetics of color removal by adsorption from water using activated clay
1Department of Chemical Engineering, Lien-Ho Institute of Technology, Taiwan.
Environmental Technology
|August 3, 2001
Abstract:
Kinetics and mechanism of adsorption of one commercial basic dye (BB69) and one direct dye (DR227) from aqueous solutions using day were studied in the temperature range 15-75 degrees C. The clay was activated by treatment with sulfuric add. Two simplified kinetic models, pseudo first- and second-order equations, were tested. It was shown that the adsorption of both dyes could be well described by the pseudo second-order equation. Rate constants of the best-fit model were calculated, and the related apparent activation energies were also evaluated and discussed.