4.7 Article

Fabrication of novel magnetic chitosan grafted with graphene oxide to enhance adsorption properties for methyl blue

期刊

JOURNAL OF HAZARDOUS MATERIALS
卷 215, 期 -, 页码 272-279

出版社

ELSEVIER
DOI: 10.1016/j.jhazmat.2012.02.068

关键词

Magnetic chitosan; Graphene oxide; Methyl blue; Adsorption; Langmuir

资金

  1. Shandong Provincial Natural Science Foundation [Y2008B53]

向作者/读者索取更多资源

A novel magnetic composite bioadsorbent composed of magnetic chitosan and graphene oxide (MCGO) was prepared as the magnetic adsorbent. The morphology, chemical structure and magnetic property of the MCGO were characterized by Fourier transform infrared spectrometer (FT-IR), X-ray diffraction (XRD) and Scanning electronic microscope (SEM), respectively. Adsorption of methyl blue (MB) onto MCGO was investigated with respect to pH, adsorption time, initial MB concentration and temperature. Kinetics data and adsorption isotherm, obtained at the optimum pH 5.3, were better fitted by pseudo-second-order kinetic model and by Langmuir isotherm, respectively. The values of activation parameters such as free energy (Delta G, -0.74 similar to-1.46 kJ mol(-1)), enthalpy (Delta H, -10.28 kJ mol(-1)) and entropy (Delta S, -36.35J mol(-1) K-1) were determined, respectively, indicating that the adsorption was spontaneous, favorable and exothermic process in nature. Moreover, the MCGO was stable and easily recovered, the adsorption capacity was about 90% of the initial saturation adsorption capacity after being used four times. (C) 2012 Elsevier B.V. All rights reserved.

作者

我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。

评论

主要评分

4.7
评分不足

次要评分

新颖性
-
重要性
-
科学严谨性
-
评价这篇论文

推荐

暂无数据
暂无数据