Removal of Basic Textile Dyes in Single and Multi-Dye Solutions by Adsorption: Statistical Optimization and Equilibrium Isotherm Studies

Gözmen, Belgin | Turabik, Meral

The removal of three basic dyes by adsorption onto bentonite was investigated forsingle, binary, and ternary solutions in a batch system. Before and after dye adsorption,bentonite samples were analyzed by using X-ray fluorescence spectrometer, SEM,and Fourier transform IR spectrometry. The D-optimal design and response surfacemethodology were applied in designing the experiments for evaluating the interactiveeffects of each initial concentrations variable of the dyes in binary systems. Predictedvalues were found to be in good agreement with experimental values, which definedpropriety of the model and the achievement of D-optimal in optimization of adsorptionof binary dye systems. The competitive adsorption results showed that the adsorptionamount of a dye was suppressed in the presence and i...