Decolorization of Coomassie brilliant blue G-250 dye using snail shell powder by action of adsorption processes

The presence of these dyes in the water causes cancer, toxicity, birth defect, teratogenicity and reduce the light penetration through the water surface and consequently that will lead to prevents the photosynthesis of the aqueous plant (2). Effect of Temperature: All experiments were carried out at dye concentration equal to 20.00 ppm over the temperature range (298, 308,318,328and 338)K in order to study the temperature effect. Qe: the amount of adsorbate which get adsorbed per unit mass of adsorbate mg/g . a: (mg/g) the maximum adsorption capacity according to Langmuir monolayer adsorption. b (L/mg) is the Langmuir constant relates to affinity and free energy of adsorption·26·. A linear plot was obtained when qe was plotted vstlnCe.·30· CONCLUSION: 1 The present study demonstrated that snail shell can be used as an effective adsorbent for the removal of CBB G250 dye from aqueous solutions. 2 Besides minimizing the wastes, the results also provide additional benefits to industrial wastewater treatment. 3 It was found that the equilibrium data fitted very well with Freundlich isotherm model. 4Thermodynamic studies indicated that the adsorption process was exothermic, the degrees of freedom decrease at the solid- liquid values and spontaneous in nature .