musa acuminata banana bunch-based activated carbon for adsorption of cu(ii) ions in aqueous solution: kinetic and isotherm studies

activated carbon prepared from musa acuminata banana bunch (ac-mabb) was proposed in this study. the active sites and morphology structure of three types of the ac-mabb were analyzed using ft-ir and sem, respectively. the effect of independent variables namely contact time, cu(ii) ions concentration in solution, naoh activator concentration, initial ph, and temperature on adsorption capacity of the ac-mabb were investigated through batch mode experiments. the cu(ii) ions adsorbed onto the ac-mabb showed excellent fitting to the pseudo-second-order adsorption kinetic with a correlation coefficient value of 0.999. meanwhile, it followed langmuir isotherm with coefficient values of 0.981 and 0.991 at 27 and 57°c, respectively. the optimum adsorption condition for 1 g of the ac-mabb was observed to be under 0.4 m naoh activation atmosphere and, stirred at initial ph of 5 with a speed of 100-rpm and a pressure of 1 atm. the maximum cu(ii) ions adsorption capacity based on langmuir was identified approximately equal to 40.322 and 46.082 mg/g at 27 and 57°c, respectively.