THERMODYNAMIC ANALYSIS OF ADSORPTION MODELS OF PHENOL IN LIQUID PHASE ON DIFFERENT ACTIVATED CARBONS

This paper studies the thermodynamic aspects of the processes of adsorption of phenol from dilute aqueous solutions on different commercial carbons, evaluating how to optimize the removal of this persistent contaminant. Two powdered activated carbons from two different companies were used: Tetrahedr...

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Autores principales:	HÚMPOLA,P. D, ODETTI,H. S, FERTITTA,A. E, VICENTE,J. L
Lenguaje:	English
Publicado:	Sociedad Chilena de Química 2013
Materias:	adsorption carbon phenol energy
Acceso en línea:	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-97072013000100009
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spelling	oai:scielo:S0717-970720130001000092014-09-09THERMODYNAMIC ANALYSIS OF ADSORPTION MODELS OF PHENOL IN LIQUID PHASE ON DIFFERENT ACTIVATED CARBONSHÚMPOLA,P. DODETTI,H. SFERTITTA,A. EVICENTE,J. L adsorption carbon phenol energy This paper studies the thermodynamic aspects of the processes of adsorption of phenol from dilute aqueous solutions on different commercial carbons, evaluating how to optimize the removal of this persistent contaminant. Two powdered activated carbons from two different companies were used: Tetrahedron Carbon (Andes Chemistry Lab., Mendoza, Argentina), and Norit (Norit Americas Inc., USA). Both specific surface areas were measured by means of the BET method. The adsorbate was high purity solid phenol (Fluka ® > 99.5%). Experimental isotherms were determined at 293 K, 303 K and 313 K. The Freundlich and Sips theoretical models were used to fit the experimental data. Freundlich isotherm slightly diverges with the experimental results for higher equilibrium concentrations. Thermodynamic parameters were calculated and correlated with the adsorption behaviours. The values of the thermodynamic parameters obtained indicate an exothermic and spontaneous process for both carbons, and mainly for Norit. This is due to the fact that there might be chemically activated regions on the surface of the Norit carbon, which give rise to combined mechanisms of physisorption and chemisorption.info:eu-repo/semantics/openAccessSociedad Chilena de QuímicaJournal of the Chilean Chemical Society v.58 n.1 20132013-03-01text/htmlhttp://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-97072013000100009en10.4067/S0717-97072013000100009
institution	Scielo Chile
collection	Scielo Chile
language	English
topic	adsorption carbon phenol energy
spellingShingle	adsorption carbon phenol energy HÚMPOLA,P. D ODETTI,H. S FERTITTA,A. E VICENTE,J. L THERMODYNAMIC ANALYSIS OF ADSORPTION MODELS OF PHENOL IN LIQUID PHASE ON DIFFERENT ACTIVATED CARBONS
description	This paper studies the thermodynamic aspects of the processes of adsorption of phenol from dilute aqueous solutions on different commercial carbons, evaluating how to optimize the removal of this persistent contaminant. Two powdered activated carbons from two different companies were used: Tetrahedron Carbon (Andes Chemistry Lab., Mendoza, Argentina), and Norit (Norit Americas Inc., USA). Both specific surface areas were measured by means of the BET method. The adsorbate was high purity solid phenol (Fluka ® > 99.5%). Experimental isotherms were determined at 293 K, 303 K and 313 K. The Freundlich and Sips theoretical models were used to fit the experimental data. Freundlich isotherm slightly diverges with the experimental results for higher equilibrium concentrations. Thermodynamic parameters were calculated and correlated with the adsorption behaviours. The values of the thermodynamic parameters obtained indicate an exothermic and spontaneous process for both carbons, and mainly for Norit. This is due to the fact that there might be chemically activated regions on the surface of the Norit carbon, which give rise to combined mechanisms of physisorption and chemisorption.
author	HÚMPOLA,P. D ODETTI,H. S FERTITTA,A. E VICENTE,J. L
author_facet	HÚMPOLA,P. D ODETTI,H. S FERTITTA,A. E VICENTE,J. L
author_sort	HÚMPOLA,P. D
title	THERMODYNAMIC ANALYSIS OF ADSORPTION MODELS OF PHENOL IN LIQUID PHASE ON DIFFERENT ACTIVATED CARBONS
title_short	THERMODYNAMIC ANALYSIS OF ADSORPTION MODELS OF PHENOL IN LIQUID PHASE ON DIFFERENT ACTIVATED CARBONS
title_full	THERMODYNAMIC ANALYSIS OF ADSORPTION MODELS OF PHENOL IN LIQUID PHASE ON DIFFERENT ACTIVATED CARBONS
title_fullStr	THERMODYNAMIC ANALYSIS OF ADSORPTION MODELS OF PHENOL IN LIQUID PHASE ON DIFFERENT ACTIVATED CARBONS
title_full_unstemmed	THERMODYNAMIC ANALYSIS OF ADSORPTION MODELS OF PHENOL IN LIQUID PHASE ON DIFFERENT ACTIVATED CARBONS
title_sort	thermodynamic analysis of adsorption models of phenol in liquid phase on different activated carbons
publisher	Sociedad Chilena de Química
publishDate	2013
url	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-97072013000100009
work_keys_str_mv	AT humpolapd thermodynamicanalysisofadsorptionmodelsofphenolinliquidphaseondifferentactivatedcarbons AT odettihs thermodynamicanalysisofadsorptionmodelsofphenolinliquidphaseondifferentactivatedcarbons AT fertittaae thermodynamicanalysisofadsorptionmodelsofphenolinliquidphaseondifferentactivatedcarbons AT vicentejl thermodynamicanalysisofadsorptionmodelsofphenolinliquidphaseondifferentactivatedcarbons
_version_	1718445480358182912

THERMODYNAMIC ANALYSIS OF ADSORPTION MODELS OF PHENOL IN LIQUID PHASE ON DIFFERENT ACTIVATED CARBONS

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