Abstract: The adsorption effects on the absorbent self-made absorb Pb2+ was researched by the absorb temperature, dosage, pH, reaction time, initial concentration. The results showed that the optimal adsorb condition is the initial pH of 5.0，the reaction time of 20 min, dosage of the absorbent is 0.900 g, initial concentration of Pb2+ is 50 mg/L. The adsorption isotherms of magnetic chitosan microsphere adsorb Pb2+ well fit Langmuir's, and Temin's models, belongs to pesuo-second-order reaction.

Key words: Magnetic chitosan microspheres, Adsorption, Plumbun ions, Kinetic model