Removal of phenol from aqueous solutions by adsorption onto Mn-Ce-K solids

Mn-Ce solids were used for the adsorption of phenol from aqueous solution at 25 and 50 C. The samples were prepared with a Mn-Ce molar ratio Between 0 and 100 % by the alkaline co-precipitation method (KOH). Structural studies showed the formation of cryptomelane, Mn2O3, Mn5O8, Mn3O4 and CeO2. The f...

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Autores principales: D'Alessandro, Oriana, Thomas, Horacio Jorge, Sambeth, Jorge Enrique
Formato: Articulo
Lenguaje:Inglés
Publicado: 2014
Materias:
Química
Phenol adsorption
Alkaline precipitation
Mn–Ce–K
Thermodynamic parameters
Acceso en línea:http://sedici.unlp.edu.ar/handle/10915/122503
Aporte de:
SEDICI (UNLP) de Universidad Nacional de La Plata
id I19-R120-10915-122503
record_format dspace
institution Universidad Nacional de La Plata
institution_str I-19
repository_str R-120
collection SEDICI (UNLP)
language Inglés
topic Química
Phenol adsorption
Alkaline precipitation
Mn–Ce–K
Thermodynamic parameters
spellingShingle Química
Phenol adsorption
Alkaline precipitation
Mn–Ce–K
Thermodynamic parameters
D'Alessandro, Oriana
Thomas, Horacio Jorge
Sambeth, Jorge Enrique
Removal of phenol from aqueous solutions by adsorption onto Mn-Ce-K solids
topic_facet Química
Phenol adsorption
Alkaline precipitation
Mn–Ce–K
Thermodynamic parameters
description Mn-Ce solids were used for the adsorption of phenol from aqueous solution at 25 and 50 C. The samples were prepared with a Mn-Ce molar ratio Between 0 and 100 % by the alkaline co-precipitation method (KOH). Structural studies showed the formation of cryptomelane, Mn2O3, Mn5O8, Mn3O4 and CeO2. The formation of different phases is a function of the Ce concentration. The adsorption isotherms of phenol were determined and modelled with Langmuir and Freundlich equations. Sample 7/3 had a high adsorption capacity. Thermodynamic parameters, in flat and vertical position of phenol, were calculated. These parameters indicated that the adsorption of phenol onto Mn-Ce was spontaneous and exothermic. The DRIFTS study detected of both phenol and phenolate species adsorbed on the surface and the aromatic ring of phenol is parallel to the surface. The interaction between Mn and Ce enhanced the reducibility of the oxides and activated oxygen, which is favorable for the adsorption process.
format Articulo
Articulo
author D'Alessandro, Oriana
Thomas, Horacio Jorge
Sambeth, Jorge Enrique
author_facet D'Alessandro, Oriana
Thomas, Horacio Jorge
Sambeth, Jorge Enrique
author_sort D'Alessandro, Oriana
title Removal of phenol from aqueous solutions by adsorption onto Mn-Ce-K solids
title_short Removal of phenol from aqueous solutions by adsorption onto Mn-Ce-K solids
title_full Removal of phenol from aqueous solutions by adsorption onto Mn-Ce-K solids
title_fullStr Removal of phenol from aqueous solutions by adsorption onto Mn-Ce-K solids
title_full_unstemmed Removal of phenol from aqueous solutions by adsorption onto Mn-Ce-K solids
title_sort removal of phenol from aqueous solutions by adsorption onto mn-ce-k solids
publishDate 2014
url http://sedici.unlp.edu.ar/handle/10915/122503
work_keys_str_mv AT dalessandrooriana removalofphenolfromaqueoussolutionsbyadsorptionontomnceksolids
AT thomashoraciojorge removalofphenolfromaqueoussolutionsbyadsorptionontomnceksolids
AT sambethjorgeenrique removalofphenolfromaqueoussolutionsbyadsorptionontomnceksolids
bdutipo_str Repositorios
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