Adsorption kinetics, isotherms and thermodynamics of Cr(III) on graphene oxide

文献类型： 外文期刊

第一作者： Yang, Shuang

作者： Yang, Shuang;Pei, Zhiguo;Li, Chunmei;Lv, Jitao;Xie, Jieli;Wen, Bei;Zhang, Shuzhen;Li, Lingyun

作者机构：

关键词： Adsorption;Graphene oxide;Chromium;Kinetics;Thermodynamics;FTIR

期刊名称：COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS （ 影响因子：4.539； 五年影响因子：4.039 ）

ISSN：

年卷期：

页码：

收录情况： SCI

摘要： The adsorption kinetics, isotherms and thermodynamics of Cr(III) on graphene oxide (GO) were studied. The adsorption kinetic data were well described with pseudo-second-order model and the equilibrium data were well fitted by Langmuir model. The calculated thermodynamic parameters indicated that the adsorption of Cr(III) on GO was spontaneous and endothermic. The maximum adsorption capacity of Cr(III) on GO at pH 5.0 and T =296K was about 92.65 mgg~(-1), which was higher than other reported adsorbents. It was found that the adsorption of Cr(III) on GO was strongly dependent on solution pH, but weakly dependent on ionic strength. Fourier transform infrared (FTIR) spectra suggested that Cr(III) was adsorbed on GO mainly through the formation of inner-sphere complexes with the O-containing functional groups on GO surface. Results in this study suggested that GO was a suitable material for the preconcentration and removal of Cr(III) from water.

分类号： O648

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