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Citation: ZHOU Li-Min, WANG Yi-Ping, LIU Zhi-Rong, HUANG Qun-Wu. Carboxymethyl Chitosan-Fe₃O₄ Nanoparticles : Preparation and Adsorption Behaviors towards Zn²⁺[J]. Acta Physico-Chimica Sinica, ;2006, 22(11): 1342-1346. doi: 10.1016/S1872-1508(06)60067-3 shu

Carboxymethyl Chitosan-Fe₃O₄ Nanoparticles : Preparation and Adsorption Behaviors towards Zn²⁺

1.
School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, P. R. China; Key Laboratory of Nuclear Resources and Environment, Ministry of Education, East China Institute of Technology, Fuzhou 344000, P. R. China

Received Date: 4 April 2006
Available Online: 6 November 2006

A novel magnetic nanoadsorbent was prepared by the covalent binding of carboxymethyl chitosan (CMC) onto the surface of Fe3O4 magnetic nanoparticles, which was developed using a coprecipitation method. This nanoadsorbent was characterized by transmission electron microscopy (TEM) and X-ray diffraction patterns (XRD), etc. Moreover, the adsorption performance of the nanoadsorbent towards Zn2+ ions was investigated. The results showed that the mean diameter of the magnetic nanoadsorbent was 18 nm and the amount of CMC was about 5%. The nanoadsorbent showed high efficiency for the removal of Zn2+ ions. The adsorption rate was so rapid that the equilibrium was achieved within 2 min. The isotherm adsorption data obeyed the Langmuir model, with a maximum adsorption capacity of 20.4 mg•g−1 and an adsorption equilibrium constant of 0.0314 L•mg−1. The thermodynamic calculation indicated that the adsorption process was exothermic and the enthalpy change was -5.68 kJ•mol−1.
- Nanoadsorbent;Carboxymethyl chitosan;Fe3O4;Zn2+ion
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沈阳化工大学材料科学与工程学院沈阳 110142

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Carboxymethyl Chitosan-Fe3O4 Nanoparticles : Preparation and Adsorption Behaviors towards Zn2+

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通讯作者: 陈斌, bchen63@163.com

Carboxymethyl Chitosan-Fe₃O₄ Nanoparticles : Preparation and Adsorption Behaviors towards Zn²⁺