ADSORPTION OF Cr(VI) FROM AQUEOUS SOLUTION USING CARBON-MICROSILICA COMPOSITE ADSORBENT

In this work, Microsilica, one kind of industry solid waste material, was utilized firstly to prepare a carbon-Microsilica composite adsorbent from a partial carbonization, mixture and sulfoxidation process and was proposed for the removal of Cr(VI) from solutions. The surface chemistry characterist...

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Autores principales:	ZHANG,DEYI, MA,YING, FENG,HUIXIA, HAO,YUAN
Lenguaje:	English
Publicado:	Sociedad Chilena de Química 2012
Materias:	Microsilica Adsorption Cr(VI) Isotherm Kinetics
Acceso en línea:	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-97072012000100002
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spelling	oai:scielo:S0717-970720120001000022012-07-19ADSORPTION OF Cr(VI) FROM AQUEOUS SOLUTION USING CARBON-MICROSILICA COMPOSITE ADSORBENTZHANG,DEYIMA,YINGFENG,HUIXIAHAO,YUAN Microsilica Adsorption Cr(VI) Isotherm Kinetics In this work, Microsilica, one kind of industry solid waste material, was utilized firstly to prepare a carbon-Microsilica composite adsorbent from a partial carbonization, mixture and sulfoxidation process and was proposed for the removal of Cr(VI) from solutions. The surface chemistry characteristics of the prepared adsorbent were analysis by XPS and FT-IR. The characterization results indicated that an abundant of oxygen functional groups, such as hydroxyl, carboxyl and sulfonic groups, were introduced into the surface of the prepared composite adsorbent. Meanwhile, the adsorption characteristics of Cr(VI) onto the adsorbent in aqueous solutions was studied as a function of solution pH, ionic strength, contact time, and temperature. The results showed that Cr(VI) adsorption onto the adsorbent is strongly dependent on pH and, to a lesser extent, ionic strength. Kinetics data were found to follow the pseudo-second-order kinetic model while the adsorption data corresponded to L-shape adsorption isotherm which corresponds to the classification of Giles. Activation thermodynamic parameters, such as activation enthalpy (ΔH), activation entropy (ΔS), activation Gibbs free energy (ΔG*) and activation energy (E), have been evaluated and the possible adsorption mechanism also was suggested.info:eu-repo/semantics/openAccessSociedad Chilena de QuímicaJournal of the Chilean Chemical Society v.57 n.1 20122012-03-01text/htmlhttp://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-97072012000100002en10.4067/S0717-97072012000100002
institution	Scielo Chile
collection	Scielo Chile
language	English
topic	Microsilica Adsorption Cr(VI) Isotherm Kinetics
spellingShingle	Microsilica Adsorption Cr(VI) Isotherm Kinetics ZHANG,DEYI MA,YING FENG,HUIXIA HAO,YUAN ADSORPTION OF Cr(VI) FROM AQUEOUS SOLUTION USING CARBON-MICROSILICA COMPOSITE ADSORBENT
description	In this work, Microsilica, one kind of industry solid waste material, was utilized firstly to prepare a carbon-Microsilica composite adsorbent from a partial carbonization, mixture and sulfoxidation process and was proposed for the removal of Cr(VI) from solutions. The surface chemistry characteristics of the prepared adsorbent were analysis by XPS and FT-IR. The characterization results indicated that an abundant of oxygen functional groups, such as hydroxyl, carboxyl and sulfonic groups, were introduced into the surface of the prepared composite adsorbent. Meanwhile, the adsorption characteristics of Cr(VI) onto the adsorbent in aqueous solutions was studied as a function of solution pH, ionic strength, contact time, and temperature. The results showed that Cr(VI) adsorption onto the adsorbent is strongly dependent on pH and, to a lesser extent, ionic strength. Kinetics data were found to follow the pseudo-second-order kinetic model while the adsorption data corresponded to L-shape adsorption isotherm which corresponds to the classification of Giles. Activation thermodynamic parameters, such as activation enthalpy (ΔH), activation entropy (ΔS), activation Gibbs free energy (ΔG*) and activation energy (E), have been evaluated and the possible adsorption mechanism also was suggested.
author	ZHANG,DEYI MA,YING FENG,HUIXIA HAO,YUAN
author_facet	ZHANG,DEYI MA,YING FENG,HUIXIA HAO,YUAN
author_sort	ZHANG,DEYI
title	ADSORPTION OF Cr(VI) FROM AQUEOUS SOLUTION USING CARBON-MICROSILICA COMPOSITE ADSORBENT
title_short	ADSORPTION OF Cr(VI) FROM AQUEOUS SOLUTION USING CARBON-MICROSILICA COMPOSITE ADSORBENT
title_full	ADSORPTION OF Cr(VI) FROM AQUEOUS SOLUTION USING CARBON-MICROSILICA COMPOSITE ADSORBENT
title_fullStr	ADSORPTION OF Cr(VI) FROM AQUEOUS SOLUTION USING CARBON-MICROSILICA COMPOSITE ADSORBENT
title_full_unstemmed	ADSORPTION OF Cr(VI) FROM AQUEOUS SOLUTION USING CARBON-MICROSILICA COMPOSITE ADSORBENT
title_sort	adsorption of cr(vi) from aqueous solution using carbon-microsilica composite adsorbent
publisher	Sociedad Chilena de Química
publishDate	2012
url	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-97072012000100002
work_keys_str_mv	AT zhangdeyi adsorptionofcrvifromaqueoussolutionusingcarbonmicrosilicacompositeadsorbent AT maying adsorptionofcrvifromaqueoussolutionusingcarbonmicrosilicacompositeadsorbent AT fenghuixia adsorptionofcrvifromaqueoussolutionusingcarbonmicrosilicacompositeadsorbent AT haoyuan adsorptionofcrvifromaqueoussolutionusingcarbonmicrosilicacompositeadsorbent
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ADSORPTION OF Cr(VI) FROM AQUEOUS SOLUTION USING CARBON-MICROSILICA COMPOSITE ADSORBENT

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