Taguchi Experimental Design for Simultaneous Absorption of Chromium and Copper from Wastewater by Chitosan

The aim of this study is the parametric optimization of simultaneous absorption of chromium and copper from wastewater by chitosan by using Taguchi experimental design. So chitosan of Shrimp was used as an adsorbent. Experiments were performed in batch mode. The effect of five parameters including adsorbent dosage, contact time, pH (each case in 4 levels), temperature and initial concentration (each case in 3 levels) were investigated. The results clearly show that adsorbent dosage and temperature has the highest and lowest effect in the removal efficiency, respectively. Maximum efficiency for simultaneous removal of chromium and copper was obtained 86.04% and 79.06%, respectively, at the condition of 20 ppm concentration, 0.16 g adsorbent dosage at pH 4 and contact time of 90 min. Adsorbent kinetic obey the pseudo-second-order model.