Abstract: Adsorption process of complexation copper onto sludge was investigated by balance oscillation method.The properties of kinetics and thermodynamic were analyzed by related equations and adsorption mechanism was characterized by BET、FTIR、SEM.The results show that adsorption balance occurr on 18 h and the removal rate of total copper is about 80%.Pseudosecond order kinetic model better described adsorption data.Langmuir model is appropriate for isothermal adsorption process.The result of BET shows that structure of sludge is microporous.—OH,Amides,COO-are observed through FTIR which might serve as the main active groups for adsorption.Metal sediment can be observed on the surface of sludge after adsorption by SEM.Adsorption mechanism including complexation and surface precipitation.

Key words: Complexation copper,Adsorption,Kinetics,Thermodynamics,Mechanism