Kinetics of color removal by adsorption from water using activated clay.
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.
Wu
F C
FC
Department of Chemical Engineering, Lien-Ho Institute of Technology, Taiwan.
Tseng
R L
RL
Juang
R S
RS
D000327:Adsorption; D000538:Aluminum Silicates / Q000737:chemistry*; D002617:Chemical Industry; D000077215:Clay; D004396:Coloring Agents / Q000737:chemistry*; D007700:Kinetics; D008962:Models, Theoretical; D013696:Temperature; D014876:Water Pollution / Q000517:prevention & control*
D000538:Aluminum Silicates; D004396:Coloring Agents; D000077215:Clay