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 degrees 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 degrees C, respectively.