In this study, low-cost biochar adsorbent originated from camel bone was prepared by physical treatment, and the prepared camel bone biochar for the removal of Cd2+ and Pb2+ from aqueous solutions was examined. The characterization of the prepared biochar adsorbent before and after the treatment with the metal solutions was done by using XRD, SEM, FT-IR, and BET surface isotherm. The bone sample was pyrolyzed at temperature 500, 600, 800, and 900 °C. Adsorption efficiency of Pb and Cd were optimized by varying different parameters viz., pH, pHz, contact time, initial metal concentration, adsorbent dosage, and temperature. Nature of the adsorption process is predicted by using adsorption kinetic, isotherms, and thermodynamic models. The results revealed that the effective pyrolysis of camel bone achieved at 800 °C which possess high removal capacity. The maximum adsorption removal percentage for Cd and Pb were 99.4 and 99.89%, respectively at contact time of 1 h, adsorbent dosage of 1 g, pH=5, and initial metal concentration 10 mg/L of both metal salts. The kinetic results of cadmium and lead adsorption obeyed a pseudo-second-order model and fitted well with the Langmuir isotherm
أ.د. محمد نجيب راشد | Prof. Dr.Mohamed Nageeb Rashed | 3979