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Citation: HUANG Fu, ZHANG Fan, WANG Bo, SUN Huaju. Kinetics and Thermodynamics of Adsorption of Zn(Ⅱ) on Reduced Graphene Oxide[J]. Chinese Journal of Applied Chemistry, ;2014, 31(12): 1458-1464. doi: 10.3724/SP.J.1095.2014.40065 shu

Kinetics and Thermodynamics of Adsorption of Zn(Ⅱ) on Reduced Graphene Oxide

1.
College of Chemistry and Chemical Engineering, Jishou University, Jishou 416000, China

Corresponding author: ZHANG Fan,
Received Date: 6 March 2014
Available Online: 26 May 2014
Fund Project: 教育部科学研究重点项目(211124) (211124)湖南省大学生研究性学习和创新性实验计划项目(湘教通[2012]141号) (湘教通[2012]141号)湖南省自然科学基金(13JJ2030)资助项目 (13JJ2030)

Reduced graphene oxide(RGO) was prepared by reducing graphene oxide(GO) with ethylenediamine(EDA).The adsorption kinetics and thermodynamics of Zn(Ⅱ) onto RGO were investigated with a batch method.The Lagergren pseudo-first-order and pseudo-second-order kinetic model,Langmuir and Freundlich isotherm models were applied to simulate the experimental data.The results show that the experimental data are well described with the Lagergren pseudo-second-order model,indicating that the adsorption process is chemisorption mainly.The adsorption isothermal process fits well with the Langmuir model.The enthalpy change is -21.60 kJ/mol and the Gibbs free energy is positive,which indicates that the adsorption of Zn(Ⅱ) is exothermic and non-spontaneous,respectively.
- Zn(Ⅱ),
- graphene oxide,
- adsorption,
- kinetics,
- thermodynamics
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