Removal of Azo Benzidine Reactive Dye From Aqueous Solution By Adsorption onto ZnO Surface
journal of kerbala university,
Volume 9, Issue 4, Pages 11-18
AbstractIn this study, the adsorption of azo benzidine reactive dye was carried out by using ZnO surface. Various parameters such as pH, adsorbent weight, initial dye concentration and contact time were studied in terms of their effect on the adsorption process. Furthermore, Lagergren’s equation was used to determine adsorption kinetics. It is observed that high removal of dye was obtained at pH=5. Removal of dye was increased by increasing initial dye concentration and contact time. High removal of dye was at the time equivalent of 90 min and reached equilibrium. Increasing of adsorbent weight leads to decrease dye adsorption where 0.1gm was the best weight. For kinetics the reaction onto ZnO followed pseudo-second order Lagergren’s equation.
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