CHROMIUM ADSORPTION FROM TANNERY EFFLUENTS BY ACTIVATED CARBONS PREPARED FROM COCONUT SHELLS BY CHEMICAL ACTIVATION WITH KOH AND ZNCL2

Activated carbons of high adsorbents properties for adsorption of chromium species from aqueous solution and Tannery effluents were prepared from coconut shells by means of chemical activation using as activating agents the KOH and ZnCL2, in atmosphere of N2(g) and CO2(g), respectively. It was found...

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Autores principales:	BENDEZÚ,S., OYAGUE,J., ROMERO,A., GARCÍA,R., MUÑOZ,Y., ESCALON,N.
Lenguaje:	English
Publicado:	Sociedad Chilena de Química 2005
Materias:	Activated carbon Activation, Chemical treatment Adsorption Adsorption properties Microporous adsorbents
Acceso en línea:	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-97072005000400007
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spelling	oai:scielo:S0717-970720050004000072006-04-19CHROMIUM ADSORPTION FROM TANNERY EFFLUENTS BY ACTIVATED CARBONS PREPARED FROM COCONUT SHELLS BY CHEMICAL ACTIVATION WITH KOH AND ZNCL2BENDEZÚ,S.OYAGUE,J.ROMERO,A.GARCÍA,R.MUÑOZ,Y.ESCALON,N. Activated carbon Activation, Chemical treatment Adsorption Adsorption properties Microporous adsorbents Activated carbons of high adsorbents properties for adsorption of chromium species from aqueous solution and Tannery effluents were prepared from coconut shells by means of chemical activation using as activating agents the KOH and ZnCL2, in atmosphere of N2(g) and CO2(g), respectively. It was found that the adsorption capacity of the produced activated carbons are significantly higher than that of the commercial one that was tested. Based on the results obtained from a variety of characterization methods, it has been determined the presence of functional organic groups, phenols and carbonyls, which are responsible for the activated carbons surface charge and it favored the chromium species adsorption, zeta potential measurements helped to explain the metal adsorption in terms of electrostatic attraction-repulsion behavior of the activated carbon surface and cations of Cr(III) and oxyanions of Cr(VI), respectively. It was observed that the activated carbons CK12 and CZ32 displayed the biggest adsorbents properties, it was adsorbed approximately 721.38 mg of chromium with the CK12, 534.43 mg with the CZ32, and only 274.02 mg with the commercial carbon (CC), by gram of activated carbon, respectively, at pH 4.45 from Tannery effluentsinfo:eu-repo/semantics/openAccessSociedad Chilena de QuímicaJournal of the Chilean Chemical Society v.50 n.4 20052005-12-01text/htmlhttp://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-97072005000400007en10.4067/S0717-97072005000400007
institution	Scielo Chile
collection	Scielo Chile
language	English
topic	Activated carbon Activation, Chemical treatment Adsorption Adsorption properties Microporous adsorbents
spellingShingle	Activated carbon Activation, Chemical treatment Adsorption Adsorption properties Microporous adsorbents BENDEZÚ,S. OYAGUE,J. ROMERO,A. GARCÍA,R. MUÑOZ,Y. ESCALON,N. CHROMIUM ADSORPTION FROM TANNERY EFFLUENTS BY ACTIVATED CARBONS PREPARED FROM COCONUT SHELLS BY CHEMICAL ACTIVATION WITH KOH AND ZNCL2
description	Activated carbons of high adsorbents properties for adsorption of chromium species from aqueous solution and Tannery effluents were prepared from coconut shells by means of chemical activation using as activating agents the KOH and ZnCL2, in atmosphere of N2(g) and CO2(g), respectively. It was found that the adsorption capacity of the produced activated carbons are significantly higher than that of the commercial one that was tested. Based on the results obtained from a variety of characterization methods, it has been determined the presence of functional organic groups, phenols and carbonyls, which are responsible for the activated carbons surface charge and it favored the chromium species adsorption, zeta potential measurements helped to explain the metal adsorption in terms of electrostatic attraction-repulsion behavior of the activated carbon surface and cations of Cr(III) and oxyanions of Cr(VI), respectively. It was observed that the activated carbons CK12 and CZ32 displayed the biggest adsorbents properties, it was adsorbed approximately 721.38 mg of chromium with the CK12, 534.43 mg with the CZ32, and only 274.02 mg with the commercial carbon (CC), by gram of activated carbon, respectively, at pH 4.45 from Tannery effluents
author	BENDEZÚ,S. OYAGUE,J. ROMERO,A. GARCÍA,R. MUÑOZ,Y. ESCALON,N.
author_facet	BENDEZÚ,S. OYAGUE,J. ROMERO,A. GARCÍA,R. MUÑOZ,Y. ESCALON,N.
author_sort	BENDEZÚ,S.
title	CHROMIUM ADSORPTION FROM TANNERY EFFLUENTS BY ACTIVATED CARBONS PREPARED FROM COCONUT SHELLS BY CHEMICAL ACTIVATION WITH KOH AND ZNCL2
title_short	CHROMIUM ADSORPTION FROM TANNERY EFFLUENTS BY ACTIVATED CARBONS PREPARED FROM COCONUT SHELLS BY CHEMICAL ACTIVATION WITH KOH AND ZNCL2
title_full	CHROMIUM ADSORPTION FROM TANNERY EFFLUENTS BY ACTIVATED CARBONS PREPARED FROM COCONUT SHELLS BY CHEMICAL ACTIVATION WITH KOH AND ZNCL2
title_fullStr	CHROMIUM ADSORPTION FROM TANNERY EFFLUENTS BY ACTIVATED CARBONS PREPARED FROM COCONUT SHELLS BY CHEMICAL ACTIVATION WITH KOH AND ZNCL2
title_full_unstemmed	CHROMIUM ADSORPTION FROM TANNERY EFFLUENTS BY ACTIVATED CARBONS PREPARED FROM COCONUT SHELLS BY CHEMICAL ACTIVATION WITH KOH AND ZNCL2
title_sort	chromium adsorption from tannery effluents by activated carbons prepared from coconut shells by chemical activation with koh and zncl2
publisher	Sociedad Chilena de Química
publishDate	2005
url	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-97072005000400007
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CHROMIUM ADSORPTION FROM TANNERY EFFLUENTS BY ACTIVATED CARBONS PREPARED FROM COCONUT SHELLS BY CHEMICAL ACTIVATION WITH KOH AND ZNCL2

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