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Desalination and Water Treatment Volume 2, 2009 - Issue 1-3
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Original Articles

Adsorption and kinetic studies of methylene blue on zeolite synthesized from fly ash

Denise Alves Fungaro Center of Environmental Chemistry, Institute for Energy and Nuclear Research, Av. Prof. Lineu Prestes, 2242, CEP 05508-000, São Paulo SP, Brazil Phone: +55 (11) 3133-9313 Fax: +55 (11) 3133-9313
,
Mariza Bruno Center of Environmental Chemistry, Institute for Energy and Nuclear Research, Av. Prof. Lineu Prestes, 2242, CEP 05508-000, São Paulo SP, Brazil Phone: +55 (11) 3133-9313 Fax: +55 (11) 3133-9313
&
Lucas Caetano Grosche Center of Environmental Chemistry, Institute for Energy and Nuclear Research, Av. Prof. Lineu Prestes, 2242, CEP 05508-000, São Paulo SP, Brazil Phone: +55 (11) 3133-9313 Fax: +55 (11) 3133-9313
Pages 231-239 | Received 19 Oct 2007, Accepted 28 Dec 2008, Published online: 03 Aug 2012
 
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Abstract

Batch sorption experiments were carried out to remove methylene blue from its aqueous solutions using zeolite synthesized from fly ash as an adsorbent. Nearly 10 min of contact time are found to be sufficient for the adsorption of dye to reach equilibrium. Equilibrium data have been analyzed using Langmuir and Freundlich isotherms and the results were found to be well represented by the Freundlich isotherm equation. Adsorption data were fitted to both Lagergren first-order and pseudo-second-order kinetic models and the data were found to follow pseudo-second-order kinetics. Thermodynamic calculations suggest that the adsorption of methylene blue on zeolite synthesized from fly ash is spontaneous and exothermic reaction.

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