Kinetics and Equilibrium Studies of the Adsorption of Copper(II) Ions from Industrial Wastewater Using Activated Carbons Derived from Sugarcane Bagasse

The monocomponent adsorption process of Cu(II) ions in synthesized industrial wastewater were investigated using activated carbons (BACs) derived from sugarcane bagasse as the precursor. Batch studies done by treating precursor with H3PO4 (BAC-P) and ZnCl2 (BAC-Zn) order to observe effects experimental variables such contact time, pH solution, adsorbent dose. Langmuir isotherm model excellently described data for both BACs, indicating monolayer coverage on BACs determination coefficients close value one. Furthermore, maximum capacities 589 225 m g ? 1 at 30°C obtained BAC-P BAC-Zn adsorbents, respectively. modeling kinetic onto adsorbents illustrated that Elovich fitted well. Here, was film-diffusion controlling, while being principally governed external mass transport where slowest step is diffusion particles through film layer. mechanism proposed taking into cognizance ion exchange surface complexation active sites between negatively charged positively ions. characterized analytical methods SEM, FTIR, EDX, XRD, BET area, zeta potential measurements. Both mainly composed mesopores bonds O-H, C-O, C=O, C-O-C. area 427.5 282 m2/g before adsorption, their isoelectric point (pHIEP) 3.70 5.26,