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Removal Orange (G) Dye from aqueous solution by adsorption on Bentonite | ||
| Tikrit Journal of Pure Science | ||
| Article 1, Volume 15, Issue 1, 2010, Pages 231-235 | ||
| Author | ||
| Ghassan S. Dawood | ||
| Abstract | ||
| The adsorption and removal of commercial Orange (G) dye onto bentonite from aqueous solution, was studied in a batch system with respect to contact time and concentration. UV-Spectrophotometric technique has been applied to study the adsorption isotherms. The pseudo first order and pseudo second order kinetics model were used to describe the kinetic data and the rate constants were evaluated. The results of kinetics studies indicated that the adsorption process can be well described with the pseudo first order kinetic model. The Langmuir and Freundlich adsorption model were applied to describe the equilibrium isotherms and the isotherms constants determine. Thermodynamic parameters such as ΔG, ΔH and ΔS were calculated, The values of the parameters showed that the process were exothermic | ||
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