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Removal of nitrobenzene from aqueous solution by adsorption on nanocrystalline hydroxyapatite

Citation

Wei, W and Sun, R and Cui, J and Wei, Z, Removal of nitrobenzene from aqueous solution by adsorption on nanocrystalline hydroxyapatite, Desalination, 263, (1-3) pp. 89-96. ISSN 0011-9164 (2010) [Refereed Article]

Copyright Statement

Copyright 2010 Elsevier B.V.

DOI: doi:10.1016/j.desal.2010.06.043

Abstract

In this study, the nanocrystalline hydroxyapatite (HAP) prepared by thermal decomposition of precursors was used as the adsorbent, and the potential of nanocrystalline HAP for nitrobenzene removal from aqueous solution was evaluated. Results indicated that nitrobenzene adsorption was initially rapid and the adsorption process reached a steady state after 1 min. The adsorption isotherms were well described by the Langmuir and the Freundlich models, the latter being found to provide the better fit with the experimental data. The nitrobenzene adsorption capability of the nanocrystalline HAP was investigated as a function of temperature, pH, ionic strength, fulvic acid, and the presence of solvent. According to the experimental results, decrease in pH and temperature resulted in increase in nitrobenzene adsorption capacity; Increasing ionic strength and the presence of fulvic acid decreased the adsorption of nitrobenzene by nanocrystalline HAP; Acetone appeared to inhibit nitrobenzene adsorption to an extent greater than the presence of methanol. Thermodynamics studied revealed that the adsorption of nitrobenzene by nanocrystalline HAP was physisorption, spontaneous and endothermic in nature. This study showed that nanocrystalline HAP could be used as an efficient adsorbent material for the removal of nitrobenzene from aqueous solution.

Item Details

Item Type:Refereed Article
Keywords:nitrobenzene, adsorption, nanocrystalline hydroxyapatite, isotherm, biocompatible adsorbent
Research Division:Chemical Sciences
Research Group:Analytical Chemistry
Research Field:Separation Science
Objective Division:Expanding Knowledge
Objective Group:Expanding Knowledge
Objective Field:Expanding Knowledge in the Chemical Sciences
Author:Wei, Z (Professor Zhenggui Wei)
ID Code:91137
Year Published:2010
Web of Science® Times Cited:41
Deposited By:Austn Centre for Research in Separation Science
Deposited On:2014-05-09
Last Modified:2014-06-12
Downloads:0

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