期刊
JOURNAL OF INDUSTRIAL AND ENGINEERING CHEMISTRY
卷 20, 期 4, 页码 2521-2527出版社
ELSEVIER SCIENCE INC
DOI: 10.1016/j.jiec.2013.10.035
关键词
Adsorption; Kinetics; Molybdenum; Multiwalled carbon nanotubes; Thermodynamics
资金
- National Science Council, Taiwan [NSC 100-2815-C-005-026-E, NSC100-2221-E-005-005-MY3]
Multiwalled carbon nanotubes (MWCNTs) were modified by NaOCl solution and employed as adsorbents to study kinetics, thermodynamics and regeneration of molybdenum (Mo) adsorption from aqueous solutions. The amount of Mo adsorbed onto MWCNT(NaOCl) increased with increasing solution temperature indicating an endothermic reaction while the kinetics of Mo adsorption follows the pseudo-second-order rate law. The Mo ions could be efficiently desorbed from the surface of MWCNT(NaOCl) by 3.6 wt% NaOCl solution for 4 h. A comparative study on the cyclic Mo adsorption between MWCNT(NaOCl) and granular activated carbon (GAC) revealed that the MWCNT(NaOCl) possess higher capacity and less attrition of Mo adsorption through 10 cycles of adsorption and desorption. This suggests that the MWCNT(NaOCl) have good potential for Mo removal in wastewater treatment. (C) 2013 The Korean Society of Industrial and Engineering Chemistry. Published by Elsevier B.V. All rights reserved.
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