Item


Modelling of breakthrough curves of single and binary mixtures of Cu(II), Cd(II), Ni(II) and Pb(II) sorption onto grape stalks waste

Few studies deal on metal sorption from multi-metal solutions, though in real situations more than one metal ion are present in solution and interactions between them occur. Interaction takes place when the different metal ions compete for the same sorbent active sites. In this work, sorption of Cu(II), Cd(II), Ni(II) and Pb(II) onto grape stalks waste in single and binary mixtures has been investigated. Sorption studies were carried out in continuous mode by using packed columns with grape stalks waste. The obtained metal ions breakthrough curves in binary mixtures showed that lead is not overshoot in binary mixtures with copper, cadmium and nickel. Copper is only overshoot in binary mixtures with lead. Nickel and cadmium suffer >60% overshoot metal sorption loose in binary mixtures with copper and lead. A model based on the Homogeneous Surface Diffusion Model (HSDM) has been developed to describe breakthrough curves. Langmuir model and Extended Langmuir Model (MEL) have been incorporated into the kinetic HSDM for breakthrough curves prediction of single and binary systems, respectively. The proposed model fits successfully the breakthrough curves of metal sorption from single and binary mixtures. In binary mixtures, the model also satisfactorily fits the elution profile of the overshoot metal ion

This work has been supported by Ministerio de Ciencia e Innovación, Spain, project CTM2008-06776-C02-01

© Chemical Engineering Journal, 2013, vol. 217, p. 129-138

Elsevier

Author: Escudero Oñate, Carlos
Poch Garcia, Jordi
Villaescusa Gil, Isabel
Date: 2013
Abstract: Few studies deal on metal sorption from multi-metal solutions, though in real situations more than one metal ion are present in solution and interactions between them occur. Interaction takes place when the different metal ions compete for the same sorbent active sites. In this work, sorption of Cu(II), Cd(II), Ni(II) and Pb(II) onto grape stalks waste in single and binary mixtures has been investigated. Sorption studies were carried out in continuous mode by using packed columns with grape stalks waste. The obtained metal ions breakthrough curves in binary mixtures showed that lead is not overshoot in binary mixtures with copper, cadmium and nickel. Copper is only overshoot in binary mixtures with lead. Nickel and cadmium suffer >60% overshoot metal sorption loose in binary mixtures with copper and lead. A model based on the Homogeneous Surface Diffusion Model (HSDM) has been developed to describe breakthrough curves. Langmuir model and Extended Langmuir Model (MEL) have been incorporated into the kinetic HSDM for breakthrough curves prediction of single and binary systems, respectively. The proposed model fits successfully the breakthrough curves of metal sorption from single and binary mixtures. In binary mixtures, the model also satisfactorily fits the elution profile of the overshoot metal ion
This work has been supported by Ministerio de Ciencia e Innovación, Spain, project CTM2008-06776-C02-01
Format: application/pdf
ISSN: 1385-8947
Document access: http://hdl.handle.net/10256/12525
Language: eng
Publisher: Elsevier
Collection: MEC/PN 2009-2012/CTM2008-06776-C02-01
Reproducció digital del document publicat a: http://dx.doi.org/10.1016/j.cej.2012.11.096
Articles publicats (D-EQATA)
Is part of: © Chemical Engineering Journal, 2013, vol. 217, p. 129-138
Rights: Tots els drets reservats
Subject: Metalls -- Absorció i adsorció
Metals -- Absorption and adsorption
Ions metàl·lics
Metal ions
Title: Modelling of breakthrough curves of single and binary mixtures of Cu(II), Cd(II), Ni(II) and Pb(II) sorption onto grape stalks waste
Type: info:eu-repo/semantics/article
Repository: DUGiDocs

Subjects

Authors