PREPARATION AND CHARACTERIZATION OF MESOPOROUS CERIUM OXIDE FOR TOXIC AS(V) REMOVAL: PERFORMANCE AND MECHANISTIC STUDIE

In the present work, adsorption of carcinogenic pentavalent arsenic (As(V)) from an aqueous solution was studied using mesoporous cerium oxide (MCO). The MCO synthesized in precipitation process and confirmed by FT-IR, SEM-EDX, XRD, BET instrumental techniques. Batch showed that 95% As(V) removed optimum conditions 0.60 g/L adsorbent dose, 10 mg/L initial concentration, time 30 min, pH 3. Pseudo-secondorder kinetics Langmuir isotherm model were fitted to experimental data. had a high surface area 191.97 m2/g maximum capacity 58.25 mg/g at could be able remove 88% 82% first second cycles after being desorbed with 0.1 M NaOH solution. Zeta potential FTIR studies suggested electrostatic attraction ligand exchange mechanisms responsible for adsorption.