Removal of Lissamine rhodamine B and acid orange 10 from aqueous solution using activated carbon/surfactant: Process optimization, kinetics and equilibrium

In the text, the four process variables of LRB and AO10 adsorptions by AC/surfactant were optimized. Moreover, the effects of process variables and their interaction in adsorption capacity were investigated for the two dye systems. The results suggested that all the four process variables have a direct relationship for the adsorptions of two dyes onto AC/DDAC because the experimental data were well-fitted by second order polynomial models. For the LRB adsorption, initial concentration of LRB (x4) has the highest contribution (95.44%) for removing it. However, for the AO10 adsorption, three process variables x2, x3, and x4 have big contributions for the removal of AO10.