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Nanocrystalline CeO2-delta as Effective Adsorbent of Azo Dyes

Authorized Users Only
2014
Authors
Tomić, Nataša M.
Dohcevic-Mitrovic, Zorana D
Paunović, Novica M
Mijin, Dušan
Radić, Nenad
Grbić, Boško
Askrabic, Sonja M
Babić, Biljana M.
Bajuk-Bogdanovic, Danica V
Article (Published version)
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Abstract
Ultrafine CeO2-delta nanopowder, prepared by a simple and cost-effective self-propagating room temperature synthesis method (SPRT), showed high adsorption capability for removal of different azo dyes. Batch type of adsorption experiments with fixed initial pH value were conducted for the removal of Reactive Orange 16 (RO16), Methyl Orange (MO), and Mordant Blue 9 (MB9). The equilibrium adsorption data were evaluated using Freundlich and Langmuir isotherm models. The Langmuir model slightly better describes isotherm data for RO16 and MO, whereas the Freundlich model was found to best fit the isotherm data for MB9 over the whole concentration range. The maximum adsorption capacities, determined from isotherm data for MO, MB9, and RO16 were 113, 101, and 91 mg g(1) respectively. The adsorption process follows the pseudo-second-order kinetic model indicating the coexistence of chemisorption and physisorption. The mechanism of azo dye adsorption is also discussed.
Source:
Langmuir, 2014, 30, 39, 11582-11590
Publisher:
  • Amer Chemical Soc, Washington
Projects:
  • Physics of nanostructured oxide materials and strongly correlated systems (RS-171032)
  • Nanostructured multifunctional materials and nanocomposites (RS-45018)
  • RS13MO11
Note:
  • The peer-reviewed version: http://cer.ihtm.bg.ac.rs/handle/123456789/3170

DOI: 10.1021/la502969w

ISSN: 0743-7463

PubMed: 25220220

WoS: 000343017600012

Scopus: 2-s2.0-84907886301
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URI
http://cer.ihtm.bg.ac.rs/handle/123456789/1392
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IHTM

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