REMOVAL OF PHENOLIC COMPOUNDS FROM AQUEOUS SOLUTIONS BY BIOSORPTION ONTO ACACIA LEUCOCEPHALA BARK POWDER: EQUILIBRIUM AND KINETIC STUDIES

The aim of this work is to determine the potential application of Acacia leucocephala bark powder as a biosorbent for removing phenolic compounds from aqueous solutions. Experiments were carried out as function of initial pH (2-10), contact time, initial concentration of adsórbate (100-400 mg/L), an...

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Autores principales:	SIVA KUMAR,NADAVALA, MIN,KIM
Lenguaje:	English
Publicado:	Sociedad Chilena de Química 2011
Materias:	Adsorption Acacia leucocephala bark powder Phenolic compounds Kinetics and Isotherm models
Acceso en línea:	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-97072011000100004
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spelling	oai:scielo:S0717-970720110001000042011-06-17REMOVAL OF PHENOLIC COMPOUNDS FROM AQUEOUS SOLUTIONS BY BIOSORPTION ONTO ACACIA LEUCOCEPHALA BARK POWDER: EQUILIBRIUM AND KINETIC STUDIESSIVA KUMAR,NADAVALAMIN,KIM Adsorption Acacia leucocephala bark powder Phenolic compounds Kinetics and Isotherm models The aim of this work is to determine the potential application of Acacia leucocephala bark powder as a biosorbent for removing phenolic compounds from aqueous solutions. Experiments were carried out as function of initial pH (2-10), contact time, initial concentration of adsórbate (100-400 mg/L), and effect of adsorbent dosage. Adsorption of phenolic compounds (phenol, 2-chlorophenol (2-CPh) and 4- chlorophenol (4-CPh)) from aqueous solutions on bark powder was studied under batch equilibrium conditions. Maximum phenol removal was observed at pH 7.0. Increase in the pH to above neutrality resulted in the decrease in the phenolic compounds adsorption capacity. The adsorption process was fast, and it reached equilibrium in 4-h contact time. The kinetics study demonstrated that the adsorption process proceeded according to the pseudo-first-order kinetic model. Three isotherm models (Langmuir, Freundlich and Dubinin-Radushkevich) were employed in the analysis of the adsorption equilibrium data. The data fitted well with the Langmuir isotherm. The Langmuir model resulted in the best fit and the new adsorbent had maximum adsorption capacities for phenol, 2-CPh and 4-CPh of 94.33, 147.05 and 181.81 mg/g, respectively. The results indicated that the A. leucocephala bark powder could be an alternative for more costly adsorbents used for removal of phenolic compounds from aqueous media.info:eu-repo/semantics/openAccessSociedad Chilena de QuímicaJournal of the Chilean Chemical Society v.56 n.1 20112011-01-01text/htmlhttp://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-97072011000100004en10.4067/S0717-97072011000100004
institution	Scielo Chile
collection	Scielo Chile
language	English
topic	Adsorption Acacia leucocephala bark powder Phenolic compounds Kinetics and Isotherm models
spellingShingle	Adsorption Acacia leucocephala bark powder Phenolic compounds Kinetics and Isotherm models SIVA KUMAR,NADAVALA MIN,KIM REMOVAL OF PHENOLIC COMPOUNDS FROM AQUEOUS SOLUTIONS BY BIOSORPTION ONTO ACACIA LEUCOCEPHALA BARK POWDER: EQUILIBRIUM AND KINETIC STUDIES
description	The aim of this work is to determine the potential application of Acacia leucocephala bark powder as a biosorbent for removing phenolic compounds from aqueous solutions. Experiments were carried out as function of initial pH (2-10), contact time, initial concentration of adsórbate (100-400 mg/L), and effect of adsorbent dosage. Adsorption of phenolic compounds (phenol, 2-chlorophenol (2-CPh) and 4- chlorophenol (4-CPh)) from aqueous solutions on bark powder was studied under batch equilibrium conditions. Maximum phenol removal was observed at pH 7.0. Increase in the pH to above neutrality resulted in the decrease in the phenolic compounds adsorption capacity. The adsorption process was fast, and it reached equilibrium in 4-h contact time. The kinetics study demonstrated that the adsorption process proceeded according to the pseudo-first-order kinetic model. Three isotherm models (Langmuir, Freundlich and Dubinin-Radushkevich) were employed in the analysis of the adsorption equilibrium data. The data fitted well with the Langmuir isotherm. The Langmuir model resulted in the best fit and the new adsorbent had maximum adsorption capacities for phenol, 2-CPh and 4-CPh of 94.33, 147.05 and 181.81 mg/g, respectively. The results indicated that the A. leucocephala bark powder could be an alternative for more costly adsorbents used for removal of phenolic compounds from aqueous media.
author	SIVA KUMAR,NADAVALA MIN,KIM
author_facet	SIVA KUMAR,NADAVALA MIN,KIM
author_sort	SIVA KUMAR,NADAVALA
title	REMOVAL OF PHENOLIC COMPOUNDS FROM AQUEOUS SOLUTIONS BY BIOSORPTION ONTO ACACIA LEUCOCEPHALA BARK POWDER: EQUILIBRIUM AND KINETIC STUDIES
title_short	REMOVAL OF PHENOLIC COMPOUNDS FROM AQUEOUS SOLUTIONS BY BIOSORPTION ONTO ACACIA LEUCOCEPHALA BARK POWDER: EQUILIBRIUM AND KINETIC STUDIES
title_full	REMOVAL OF PHENOLIC COMPOUNDS FROM AQUEOUS SOLUTIONS BY BIOSORPTION ONTO ACACIA LEUCOCEPHALA BARK POWDER: EQUILIBRIUM AND KINETIC STUDIES
title_fullStr	REMOVAL OF PHENOLIC COMPOUNDS FROM AQUEOUS SOLUTIONS BY BIOSORPTION ONTO ACACIA LEUCOCEPHALA BARK POWDER: EQUILIBRIUM AND KINETIC STUDIES
title_full_unstemmed	REMOVAL OF PHENOLIC COMPOUNDS FROM AQUEOUS SOLUTIONS BY BIOSORPTION ONTO ACACIA LEUCOCEPHALA BARK POWDER: EQUILIBRIUM AND KINETIC STUDIES
title_sort	removal of phenolic compounds from aqueous solutions by biosorption onto acacia leucocephala bark powder: equilibrium and kinetic studies
publisher	Sociedad Chilena de Química
publishDate	2011
url	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-97072011000100004
work_keys_str_mv	AT sivakumarnadavala removalofphenoliccompoundsfromaqueoussolutionsbybiosorptionontoacacialeucocephalabarkpowderequilibriumandkineticstudies AT minkim removalofphenoliccompoundsfromaqueoussolutionsbybiosorptionontoacacialeucocephalabarkpowderequilibriumandkineticstudies
_version_	1718445440847839232

REMOVAL OF PHENOLIC COMPOUNDS FROM AQUEOUS SOLUTIONS BY BIOSORPTION ONTO ACACIA LEUCOCEPHALA BARK POWDER: EQUILIBRIUM AND KINETIC STUDIES

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