ADSORPTION CAPACITY OF COPPER OF NATURAL AND MODIFIED RADIATA BARK PINE

The presence of soluble heavy metals in wastewaters, can be toxic for the living beings depending on theirs concentrations. Several studies have been proposed in the literature about the use of natural and modified barks, in relation with heavy metal adsorption from water. This technique have some c...

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Autores principales:	Montes S,S, Valero G,E, Morales S,L, M. Vilches,A, Schmidt,R
Lenguaje:	English
Publicado:	Sociedad Chilena de Química 2003
Materias:	adsorption kinetic metals bark
Acceso en línea:	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-97072003000400002
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spelling	oai:scielo:S0717-970720030004000022004-04-26ADSORPTION CAPACITY OF COPPER OF NATURAL AND MODIFIED RADIATA BARK PINEMontes S,SValero G,EMorales S,LM. Vilches,ASchmidt,R adsorption kinetic metals bark The presence of soluble heavy metals in wastewaters, can be toxic for the living beings depending on theirs concentrations. Several studies have been proposed in the literature about the use of natural and modified barks, in relation with heavy metal adsorption from water. This technique have some comparative advantages in front of neutralization-precipitation traditional technique. This work studies the radiata bark pine behaviour in contact with pure solutions of copper at 20° C. The ionic exchange depends on slurry density, pH value and metal concentration. The maximun adsorption capacity on natural bark takes 90 to 120 minutes (slurry density ³ 0.15%(m/v)). The range of saturation values is between 20 to 50 mg/g dry bark. Using activated bark, the range of values is between 45 to 60 mg/g dried bark, with slight dependance of the pH value. In acid media, copper adsorption kinetic is compatible with a first order model, and its specific rate constant increases with the pH value. At same experimental conditions performed for both raw and chemically treated bark separately, it was observed that, keeping the same kinetic model, the specific rate constant increases near to three times when the chemically treated bark is usedinfo:eu-repo/semantics/openAccessSociedad Chilena de QuímicaJournal of the Chilean Chemical Society v.48 n.4 20032003-12-01text/htmlhttp://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-97072003000400002en10.4067/S0717-97072003000400002
institution	Scielo Chile
collection	Scielo Chile
language	English
topic	adsorption kinetic metals bark
spellingShingle	adsorption kinetic metals bark Montes S,S Valero G,E Morales S,L M. Vilches,A Schmidt,R ADSORPTION CAPACITY OF COPPER OF NATURAL AND MODIFIED RADIATA BARK PINE
description	The presence of soluble heavy metals in wastewaters, can be toxic for the living beings depending on theirs concentrations. Several studies have been proposed in the literature about the use of natural and modified barks, in relation with heavy metal adsorption from water. This technique have some comparative advantages in front of neutralization-precipitation traditional technique. This work studies the radiata bark pine behaviour in contact with pure solutions of copper at 20° C. The ionic exchange depends on slurry density, pH value and metal concentration. The maximun adsorption capacity on natural bark takes 90 to 120 minutes (slurry density ³ 0.15%(m/v)). The range of saturation values is between 20 to 50 mg/g dry bark. Using activated bark, the range of values is between 45 to 60 mg/g dried bark, with slight dependance of the pH value. In acid media, copper adsorption kinetic is compatible with a first order model, and its specific rate constant increases with the pH value. At same experimental conditions performed for both raw and chemically treated bark separately, it was observed that, keeping the same kinetic model, the specific rate constant increases near to three times when the chemically treated bark is used
author	Montes S,S Valero G,E Morales S,L M. Vilches,A Schmidt,R
author_facet	Montes S,S Valero G,E Morales S,L M. Vilches,A Schmidt,R
author_sort	Montes S,S
title	ADSORPTION CAPACITY OF COPPER OF NATURAL AND MODIFIED RADIATA BARK PINE
title_short	ADSORPTION CAPACITY OF COPPER OF NATURAL AND MODIFIED RADIATA BARK PINE
title_full	ADSORPTION CAPACITY OF COPPER OF NATURAL AND MODIFIED RADIATA BARK PINE
title_fullStr	ADSORPTION CAPACITY OF COPPER OF NATURAL AND MODIFIED RADIATA BARK PINE
title_full_unstemmed	ADSORPTION CAPACITY OF COPPER OF NATURAL AND MODIFIED RADIATA BARK PINE
title_sort	adsorption capacity of copper of natural and modified radiata bark pine
publisher	Sociedad Chilena de Química
publishDate	2003
url	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-97072003000400002
work_keys_str_mv	AT montesss adsorptioncapacityofcopperofnaturalandmodifiedradiatabarkpine AT valeroge adsorptioncapacityofcopperofnaturalandmodifiedradiatabarkpine AT moralessl adsorptioncapacityofcopperofnaturalandmodifiedradiatabarkpine AT mvilchesa adsorptioncapacityofcopperofnaturalandmodifiedradiatabarkpine AT schmidtr adsorptioncapacityofcopperofnaturalandmodifiedradiatabarkpine
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ADSORPTION CAPACITY OF COPPER OF NATURAL AND MODIFIED RADIATA BARK PINE

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