Using amine-functionalized magnetite hollow nanospheres (AMHNs) as adsorbents for heavy metal ions

作者：Lin, Sen; Liu, Lili; Yang, Yong; Zhang, Wei; Xu, Meng; Lin, Kuangfei^*

来源：Water Science and Technology, 2017, 76(2): 452-458.

DOI：10.2166/wst.2017.225

• adsorption isotherms
• adsorption kinetics
• competitive adsorption
• heavy metal ions
• magnetite hollow nanospheres

In this paper, the amine-functionalized magnetite hollow nanospheres (AMHNs), prepared through a facile one-pot synthesis, were used as heavy metal ion adsorbents, whose morphology and physicochemical features were exploring by transmission electron microscopy, vibrating sample magnetometer, X-ray diffraction and Fourier-transform infrared analyses. Its adsorption performances for Pb2+, Cu2+, Zn2+, Ni2+ and Cd2+ were studied in detail. The adsorption increased with the increase of initial pH value of the solution and could be obviously affected by ionic strength. Also, the adsorption kinetics and isotherms were studied. The adsorption processes for Pb2+, Cu2+, Zn2+, Ni2+ and Cd2+ could all reach equilibrium in 60 min and be described well by the Langmuir thermodynamics model. The saturated adsorption capacities for Pb2+, Cu2+, Zn2+, Ni2+ and Cd2+ were 0.66, 0.47, 0.45, 0.38 and 0.26 mmol/g, respectively. In addition, the competitive adsorption showed the AMHNs had higher affinity to Pb2+ than to other heavy metal ions.

• 出版日期2017-7
• 单位华东理工大学; 北京大学