EFFICIENT REMOVAL OF Cr(VI) BY POLYELECTROLYTE-ASSISTED ULTRAFILTRATION AND SUBSEQUENT ELECTROCHEMICAL REDUCTION TO Cr(III)

ABSTRACT This work is focused on the removal of Cr(VI) ions from aqueous solution using water-soluble poly(diallyldimethylammonium chloride), PDDA, coupled to an ultrafiltration membrane of regenerated cellulose and subsequent electrochemical reduction of Cr(VI) to Cr(III). The removal of Cr(VI), us...

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Autores principales:	SÁNCHEZ,JULIO, BUTTER,BRYAN, BASÁEZ,LUIS, RIVAS,BERNABÉ L., THOTIYL,MUSTHAFA OTTAKAM
Lenguaje:	English
Publicado:	Sociedad Chilena de Química 2017
Materias:	Chromium ion exchange membrane water-soluble polymer
Acceso en línea:	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-97072017000303647
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spelling	oai:scielo:S0717-970720170003036472017-09-08EFFICIENT REMOVAL OF Cr(VI) BY POLYELECTROLYTE-ASSISTED ULTRAFILTRATION AND SUBSEQUENT ELECTROCHEMICAL REDUCTION TO Cr(III)SÁNCHEZ,JULIOBUTTER,BRYANBASÁEZ,LUISRIVAS,BERNABÉ L.THOTIYL,MUSTHAFA OTTAKAM Chromium ion exchange membrane water-soluble polymer ABSTRACT This work is focused on the removal of Cr(VI) ions from aqueous solution using water-soluble poly(diallyldimethylammonium chloride), PDDA, coupled to an ultrafiltration membrane of regenerated cellulose and subsequent electrochemical reduction of Cr(VI) to Cr(III). The removal of Cr(VI), using the washing mode, was studied as a function of pH, the molar ratio of polymer:Cr(VI), and the presence of interfering ions. The enrichment mode was used to determine the maximum retention capacity of the polymer, and the release of Cr(VI) and regeneration of the polymer were analysed by sorption-desorption process. Subsequently, the electroanalysis of Cr(VI) was conducted by linear sweep voltammetry and full electrolysis at controlled-potential in acidic media and in the presence of PDDA. The results show an efficient removal of Cr(VI) (95%, 30 mg/L in the feed) using PDDA at pH 9 and a polymer:Cr molar ratio of 20:1. The retention capacity of the polymer was decreased by the presence of sulphate anions. The maximum retention capacity of PDDA was 33 mg Cr/g polymer at pH 9. Using the sorption–desorption process, the results indicated that this water-soluble polymer can release Cr(VI) and be regenerated. Finally, the electrolysis of Cr(VI) to Cr(III) was performed successfully in the presence of PDDA.info:eu-repo/semantics/openAccessSociedad Chilena de QuímicaJournal of the Chilean Chemical Society v.62 n.3 20172017-09-01text/htmlhttp://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-97072017000303647en10.4067/s0717-97072017000303647
institution	Scielo Chile
collection	Scielo Chile
language	English
topic	Chromium ion exchange membrane water-soluble polymer
spellingShingle	Chromium ion exchange membrane water-soluble polymer SÁNCHEZ,JULIO BUTTER,BRYAN BASÁEZ,LUIS RIVAS,BERNABÉ L. THOTIYL,MUSTHAFA OTTAKAM EFFICIENT REMOVAL OF Cr(VI) BY POLYELECTROLYTE-ASSISTED ULTRAFILTRATION AND SUBSEQUENT ELECTROCHEMICAL REDUCTION TO Cr(III)
description	ABSTRACT This work is focused on the removal of Cr(VI) ions from aqueous solution using water-soluble poly(diallyldimethylammonium chloride), PDDA, coupled to an ultrafiltration membrane of regenerated cellulose and subsequent electrochemical reduction of Cr(VI) to Cr(III). The removal of Cr(VI), using the washing mode, was studied as a function of pH, the molar ratio of polymer:Cr(VI), and the presence of interfering ions. The enrichment mode was used to determine the maximum retention capacity of the polymer, and the release of Cr(VI) and regeneration of the polymer were analysed by sorption-desorption process. Subsequently, the electroanalysis of Cr(VI) was conducted by linear sweep voltammetry and full electrolysis at controlled-potential in acidic media and in the presence of PDDA. The results show an efficient removal of Cr(VI) (95%, 30 mg/L in the feed) using PDDA at pH 9 and a polymer:Cr molar ratio of 20:1. The retention capacity of the polymer was decreased by the presence of sulphate anions. The maximum retention capacity of PDDA was 33 mg Cr/g polymer at pH 9. Using the sorption–desorption process, the results indicated that this water-soluble polymer can release Cr(VI) and be regenerated. Finally, the electrolysis of Cr(VI) to Cr(III) was performed successfully in the presence of PDDA.
author	SÁNCHEZ,JULIO BUTTER,BRYAN BASÁEZ,LUIS RIVAS,BERNABÉ L. THOTIYL,MUSTHAFA OTTAKAM
author_facet	SÁNCHEZ,JULIO BUTTER,BRYAN BASÁEZ,LUIS RIVAS,BERNABÉ L. THOTIYL,MUSTHAFA OTTAKAM
author_sort	SÁNCHEZ,JULIO
title	EFFICIENT REMOVAL OF Cr(VI) BY POLYELECTROLYTE-ASSISTED ULTRAFILTRATION AND SUBSEQUENT ELECTROCHEMICAL REDUCTION TO Cr(III)
title_short	EFFICIENT REMOVAL OF Cr(VI) BY POLYELECTROLYTE-ASSISTED ULTRAFILTRATION AND SUBSEQUENT ELECTROCHEMICAL REDUCTION TO Cr(III)
title_full	EFFICIENT REMOVAL OF Cr(VI) BY POLYELECTROLYTE-ASSISTED ULTRAFILTRATION AND SUBSEQUENT ELECTROCHEMICAL REDUCTION TO Cr(III)
title_fullStr	EFFICIENT REMOVAL OF Cr(VI) BY POLYELECTROLYTE-ASSISTED ULTRAFILTRATION AND SUBSEQUENT ELECTROCHEMICAL REDUCTION TO Cr(III)
title_full_unstemmed	EFFICIENT REMOVAL OF Cr(VI) BY POLYELECTROLYTE-ASSISTED ULTRAFILTRATION AND SUBSEQUENT ELECTROCHEMICAL REDUCTION TO Cr(III)
title_sort	efficient removal of cr(vi) by polyelectrolyte-assisted ultrafiltration and subsequent electrochemical reduction to cr(iii)
publisher	Sociedad Chilena de Química
publishDate	2017
url	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-97072017000303647
work_keys_str_mv	AT sanchezjulio efficientremovalofcrvibypolyelectrolyteassistedultrafiltrationandsubsequentelectrochemicalreductiontocriii AT butterbryan efficientremovalofcrvibypolyelectrolyteassistedultrafiltrationandsubsequentelectrochemicalreductiontocriii AT basaezluis efficientremovalofcrvibypolyelectrolyteassistedultrafiltrationandsubsequentelectrochemicalreductiontocriii AT rivasbernabel efficientremovalofcrvibypolyelectrolyteassistedultrafiltrationandsubsequentelectrochemicalreductiontocriii AT thotiylmusthafaottakam efficientremovalofcrvibypolyelectrolyteassistedultrafiltrationandsubsequentelectrochemicalreductiontocriii
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EFFICIENT REMOVAL OF Cr(VI) BY POLYELECTROLYTE-ASSISTED ULTRAFILTRATION AND SUBSEQUENT ELECTROCHEMICAL REDUCTION TO Cr(III)

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