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Adsorption of methylene blue from aqueous solution onto porous cellulose-derived carbon/montmorillonite nanocomposites

Adsorption of methylene blue from aqueous solution onto porous cellulose-derived carbon/montmorillonite nanocomposites

Applied Clay Science

Volume 161,?1 September 2018, Pages 256-264
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Dong ShenTongaCheng Wen?WuaMoses O.AdebajobGui Chen?JinaWei Hua?YuaSheng Fu?JicChun Hui?Zhouad
a
Research Group for Advanced Materials & Sustainable Catalysis (AMSC), State Key Laboratory Breeding Base of Green Chemistry Synthesis Technology, Discipline of Industrial Catalysis, College of Chemical Engineering, Zhejiang University of Technology, Hangzhou 310032, China
b
Queensland University of Technology, GPO Box 2434, Brisbane, QLD 4001, Australia
c
State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology, Beijing 100029, China
d
Centre for Future Materials, University of Southern Queensland, Toowoomba, Queensland 4350, Australia

Received 13 September 2017, Revised 9 February 2018, Accepted 12 February 2018, Available online 1 May 2018.

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Abstract

Biomass-derived?amorphous carbon?has received considerable attention in recent decades. In this paper, carbon/montmorillonite (CMt)?nanocomposites?were synthesized by a?hydrothermal carbonization?of?cellulose?and?montmorillonite?(Mt), and the adsorption properties were evaluated by the removal of?methylene blue?(MB) from aqueous solutions. The CMt was characterized by X-ray diffraction,?Fourier transform infrared spectroscopy, Nitrogen adsorption-desorption?isotherm,?Scanning electron microscopy, and?Thermal analysis. The pseudo-first-order and pseudo-second-order?kinetic models?were used to describe the?kinetic?data and the Langmuir, Freundlich, Redlich-Peterson and Sips models were applied to describe the?adsorption isotherms. The results showed that the equilibrium adsorption data was found to fit better to the Redlich-Peterson adsorption model, and the?adsorption capacity?for the removal of MB on CMt was 138.1?mg·g?1. The kinetic process of adsorption could be described by the pseudo-second-order model. The?porous structure?of CMt was responsible for the adsorption of MB. But the adsorption ability could be improved by increasing pH. Lastly, the adsorption mechanism was obtained.

https://doi.org/10.1016/j.clay.2018.02.017
https://www.sciencedirect.com/science/article/pii/S016913171830070X

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