2012•Engineering Journal of Wuhan UniversityRequires access
Adsorption properties of magnetic chitosan nanoparticle for humic acid and heavy metal ions
Shan Ma
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Abstract
The adsorption property of magnetic chitosan nanoparticle for humic acid and metal ions were studied.The adsorption performance of the absorbent on metal ions(Cu2+,Pb2+ and Cd2+) were affected by the presence of humic acid.The experimental results show that the highest adsorption capacity of 292 mg/g for humic acid is obtained at pH=11.The adsorption equilibrium was arrived in 15 min.The adsorption capacity for humic acid remained 60% of the initial adsorption capacity after being used five times.Furthermore,the Fe3O4-chitosan particles could be used to absorb metal ions after adsorption of humic acid.Compared with the results of metal ions alone adsorption,the adsorption capacities for Cu2+ and Pb2+ were decreased while the adsorption capacity for Cd2+ was greatly increased after adsorption of humic acid.