فهرست نشریات علمی دسترسی آزاد ایران

A new modified magnetic Graphene Oxide with Chitosan and Cysteine was synthesized for removing Pb2+ ions from aqueous solution. The properties of this adsorbent were characterized by Field Emission Scanning Electron Microscopy (FESEM), Vibrating Sample Magnetometer (VSM) and Energy Dispersive Analysis System of X-ray (EDAX). Physicochemical parameters such as effect of pH, contact time, adsorbent dosage and initial concentration of Pb 2+ was also studied. The results showed that the maximum capacity of absorbent in Lead ions adsorption (at Equilibrium concentration of 120 ppm) occurred at pHOptimum= 5.75, tOptimum= 30 min and adsorbent 85.4 mg/g dosage=0.1 gr. Maximum empirical adsorption capacity (qmax) was calculated 85.4 mg/g. The thermodynamic parameters (ΔHᵒ, ΔGᵒ and ΔSᵒ) showed that the adsorption process of Pb 2+ on modified magnetic Graphene Oxide with Chitosan and Cysteine was endothermic and spontaneous. Removal percentage was reduced to 15% after five stages of Sorption/desorption studies. So, modified magnetic Graphene Oxide with Chitosan and Cysteine can be used as a complementary process for removal of Pb2+ ions from water and wastewater.