Kinetic modeling of the biosorption of Cd2+ ions from aqueous solutions onto Eichhornia crassipes roots using potentiometry: low-cost alternative to conventional methods

This work presents the use of potentiometric measurements for kinetic studies of biosorption of Cd2+ ions from aqueous solutions on Eichhornia crassipes roots. The open circuit potential of the Cd/Cd2+ electrode of the first kind was measured during the bioadsorption process. The amount of Cd2+ ions...

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Main Authors:	Carolina Martínez-Sánchez, Luz María Torres-Rodríguez, Ramón Fernando García de la Cruz
Format:	Article
Language:	English
Published:	Sociedade Brasileira de Química 2013-01-01
Series:	Química Nova
Subjects:	biosorption potentiometry kinetics
Online Access:	http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-40422013000800022&lng=en&tlng=en

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spelling	doaj-3de8ebe0b3b0483e87c88b1e9cd921b92020-11-24T23:52:13ZengSociedade Brasileira de QuímicaQuímica Nova1678-70642013-01-013681227123110.1590/S0100-40422013000800022S0100-40422013000800022Kinetic modeling of the biosorption of Cd2+ ions from aqueous solutions onto Eichhornia crassipes roots using potentiometry: low-cost alternative to conventional methodsCarolina Martínez-Sánchez0Luz María Torres-Rodríguez1Ramón Fernando García de la Cruz2Universidad Autónoma de San Luis PotosíUniversidad Autónoma de San Luis PotosíUniversidad Autónoma de San Luis PotosíThis work presents the use of potentiometric measurements for kinetic studies of biosorption of Cd2+ ions from aqueous solutions on Eichhornia crassipes roots. The open circuit potential of the Cd/Cd2+ electrode of the first kind was measured during the bioadsorption process. The amount of Cd2+ ions accumulated was determined in real time. The data were fit to different models, with the pseudo-second-order model proving to be the best in describing the data. The advantages and limitations of the methodology proposed relative to the traditional method are discussed.http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-40422013000800022&lng=en&tlng=enbiosorptionpotentiometrykinetics
collection	DOAJ
language	English
format	Article
sources	DOAJ
author	Carolina Martínez-Sánchez Luz María Torres-Rodríguez Ramón Fernando García de la Cruz
spellingShingle	Carolina Martínez-Sánchez Luz María Torres-Rodríguez Ramón Fernando García de la Cruz Kinetic modeling of the biosorption of Cd2+ ions from aqueous solutions onto Eichhornia crassipes roots using potentiometry: low-cost alternative to conventional methods Química Nova biosorption potentiometry kinetics
author_facet	Carolina Martínez-Sánchez Luz María Torres-Rodríguez Ramón Fernando García de la Cruz
author_sort	Carolina Martínez-Sánchez
title	Kinetic modeling of the biosorption of Cd2+ ions from aqueous solutions onto Eichhornia crassipes roots using potentiometry: low-cost alternative to conventional methods
title_short	Kinetic modeling of the biosorption of Cd2+ ions from aqueous solutions onto Eichhornia crassipes roots using potentiometry: low-cost alternative to conventional methods
title_full	Kinetic modeling of the biosorption of Cd2+ ions from aqueous solutions onto Eichhornia crassipes roots using potentiometry: low-cost alternative to conventional methods
title_fullStr	Kinetic modeling of the biosorption of Cd2+ ions from aqueous solutions onto Eichhornia crassipes roots using potentiometry: low-cost alternative to conventional methods
title_full_unstemmed	Kinetic modeling of the biosorption of Cd2+ ions from aqueous solutions onto Eichhornia crassipes roots using potentiometry: low-cost alternative to conventional methods
title_sort	kinetic modeling of the biosorption of cd2+ ions from aqueous solutions onto eichhornia crassipes roots using potentiometry: low-cost alternative to conventional methods
publisher	Sociedade Brasileira de Química
series	Química Nova
issn	1678-7064
publishDate	2013-01-01
description	This work presents the use of potentiometric measurements for kinetic studies of biosorption of Cd2+ ions from aqueous solutions on Eichhornia crassipes roots. The open circuit potential of the Cd/Cd2+ electrode of the first kind was measured during the bioadsorption process. The amount of Cd2+ ions accumulated was determined in real time. The data were fit to different models, with the pseudo-second-order model proving to be the best in describing the data. The advantages and limitations of the methodology proposed relative to the traditional method are discussed.
topic	biosorption potentiometry kinetics
url	http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-40422013000800022&lng=en&tlng=en
work_keys_str_mv	AT carolinamartinezsanchez kineticmodelingofthebiosorptionofcd2ionsfromaqueoussolutionsontoeichhorniacrassipesrootsusingpotentiometrylowcostalternativetoconventionalmethods AT luzmariatorresrodriguez kineticmodelingofthebiosorptionofcd2ionsfromaqueoussolutionsontoeichhorniacrassipesrootsusingpotentiometrylowcostalternativetoconventionalmethods AT ramonfernandogarciadelacruz kineticmodelingofthebiosorptionofcd2ionsfromaqueoussolutionsontoeichhorniacrassipesrootsusingpotentiometrylowcostalternativetoconventionalmethods
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Kinetic modeling of the biosorption of Cd2+ ions from aqueous solutions onto Eichhornia crassipes roots using potentiometry: low-cost alternative to conventional methods

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