Process optimization, kinetics and equilibrium of orange G and acid orange 7 adsorptions onto chitosan/surfactant

In the study, the process variables such as the concentration of surfactant, temperature, initial concentration of dye were optimized by the response surface methodology (RSM). The experimental data were well-fitted to second order polynomial models and the two models were also examined by the analysis of variance and t test statistics, respectively. The results indicated that the two selected quadratic models in predicting the adsorption capacities of the two dyes were appropriate for the orange G and acid orange 7 systems.