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Journal of Chemistry
Volume 2017, Article ID 1936829, 9 pages
https://doi.org/10.1155/2017/1936829
Research Article

Adsorption Equilibrium and Kinetics of the Removal of Ammoniacal Nitrogen by Zeolite X/Activated Carbon Composite Synthesized from Elutrilithe

1College of Water Resource Science and Engineering, Taiyuan University of Technology, Taiyuan 030024, China
2College of Chemistry and Chemical Engineering, Taiyuan University of Technology, Taiyuan 030024, China
3State Key Laboratory Breeding Base of Coal Science and Technology Co-Founded by Shanxi Province and the Ministry of Science and Technology, Taiyuan University of Technology, Taiyuan 030024, China

Correspondence should be addressed to Feng Yu; nc.ude.tuyt@gnefuy and Juanjuan Ma; moc.361@ytxsjjm

Received 5 December 2016; Revised 26 January 2017; Accepted 1 February 2017; Published 27 March 2017

Academic Editor: Mu. Naushad

Copyright © 2017 Yong Zhang et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

Zeolite X/activated carbon composite material (X/AC) was prepared from elutrilithe, by a process consisting of carbonization, activation, and subsequent hydrothermal transformation of aluminosilicate in alkaline solution, which was used for the removal of ammoniacal nitrogen from aqueous solutions. Adsorption kinetics, equilibrium, and thermodynamic were studied and fitted by various models. The adsorption kinetics is best depicted by pseudosecond-order model, and the adsorption isotherm fits the Freundlich and Redlich-Peterson model. This explains the ammoniacal nitrogen adsorption onto X/AC which was chemical adsorption in nature. Thermodynamic properties such as , , and were determined for the ammoniacal nitrogen adsorption, and the positive enthalpy confirmed that the adsorption process was endothermic. It can be inferred that ammoniacal nitrogen removal by X/AC composite is attributed to the ion exchange ability of zeolite X. Further, as a novel sorbent, this material has the potential application in removing ammoniacal nitrogen coexisting with other organic compounds from industrial wastewater.