Adsorption of crystal violet on montmorillonite (or iron modified montmorillonite) followed by degradation through Fenton or photo-Fenton type reactions

In this work we demonstrate the feasibility to couple adsorption with Fenton and photo-Fenton process to separate and mineralize crystal violet (CV) dissolved in water. Montmorillonite (MMT) and iron modified montmorillonite (MMT-Fe) were studied as adsorbents and heterogeneous catalysts for Fenton...

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Autores principales: Guz, L., Curutchet, G., Torres Sánchez, R.M., Candal, R.
Formato: JOUR
Materias:
Adsorption
Crystal violet
Fenton
Montmorillonite
Photo-Fenton
Dyes
Electrophoretic mobility
Iron
Mineralogy
Oxidation
Adsorption capacities
Heterogeneous catalyst
Modified montmorillonite
Photo-fenton oxidations
Pseudo-first order kinetic model
Clay minerals
Acceso en línea:http://hdl.handle.net/20.500.12110/paper_22133437_v2_n4_p2344_Guz
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Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
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spelling todo:paper_22133437_v2_n4_p2344_Guz2023-10-03T16:40:36Z Adsorption of crystal violet on montmorillonite (or iron modified montmorillonite) followed by degradation through Fenton or photo-Fenton type reactions Guz, L. Curutchet, G. Torres Sánchez, R.M. Candal, R. Adsorption Crystal violet Fenton Montmorillonite Photo-Fenton Adsorption Dyes Electrophoretic mobility Iron Mineralogy Oxidation Adsorption capacities Crystal violet Fenton Heterogeneous catalyst Modified montmorillonite Photo-Fenton Photo-fenton oxidations Pseudo-first order kinetic model Clay minerals In this work we demonstrate the feasibility to couple adsorption with Fenton and photo-Fenton process to separate and mineralize crystal violet (CV) dissolved in water. Montmorillonite (MMT) and iron modified montmorillonite (MMT-Fe) were studied as adsorbents and heterogeneous catalysts for Fenton and photo-Fenton like oxidation of cationic dye CV. The clays were characterized by XRD, SEM, EDX, BET surface area and electrophoretic mobility. MMT-Fe presents iron in the interlayer space and oxohydroxide particles on its surface. Both clays present a high CV adsorption capacity that can be modeled by a two-site Langmuir equation. MMT-Fe oxidizes faster and have a higher mineralization rate of adsorbed CV than MMT with Fe(II) or Fe(III) added externally. The oxidation of the adsorbed dye release organics to the solution which are further mineralized in solution. The Fenton oxidation can be modeled by a double exponential decay and photo-Fenton oxidation by a pseudo-first order kinetic model. Photo-Fenton oxidation leads to higher mineralization rates than Fenton. © 2014 Elsevier Ltd. All rights reserved. JOUR info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar http://hdl.handle.net/20.500.12110/paper_22133437_v2_n4_p2344_Guz
institution Universidad de Buenos Aires
institution_str I-28
repository_str R-134
collection Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
topic Adsorption
Crystal violet
Fenton
Montmorillonite
Photo-Fenton
Adsorption
Dyes
Electrophoretic mobility
Iron
Mineralogy
Oxidation
Adsorption capacities
Crystal violet
Fenton
Heterogeneous catalyst
Modified montmorillonite
Photo-Fenton
Photo-fenton oxidations
Pseudo-first order kinetic model
Clay minerals
spellingShingle Adsorption
Crystal violet
Fenton
Montmorillonite
Photo-Fenton
Adsorption
Dyes
Electrophoretic mobility
Iron
Mineralogy
Oxidation
Adsorption capacities
Crystal violet
Fenton
Heterogeneous catalyst
Modified montmorillonite
Photo-Fenton
Photo-fenton oxidations
Pseudo-first order kinetic model
Clay minerals
Guz, L.
Curutchet, G.
Torres Sánchez, R.M.
Candal, R.
Adsorption of crystal violet on montmorillonite (or iron modified montmorillonite) followed by degradation through Fenton or photo-Fenton type reactions
topic_facet Adsorption
Crystal violet
Fenton
Montmorillonite
Photo-Fenton
Adsorption
Dyes
Electrophoretic mobility
Iron
Mineralogy
Oxidation
Adsorption capacities
Crystal violet
Fenton
Heterogeneous catalyst
Modified montmorillonite
Photo-Fenton
Photo-fenton oxidations
Pseudo-first order kinetic model
Clay minerals
description In this work we demonstrate the feasibility to couple adsorption with Fenton and photo-Fenton process to separate and mineralize crystal violet (CV) dissolved in water. Montmorillonite (MMT) and iron modified montmorillonite (MMT-Fe) were studied as adsorbents and heterogeneous catalysts for Fenton and photo-Fenton like oxidation of cationic dye CV. The clays were characterized by XRD, SEM, EDX, BET surface area and electrophoretic mobility. MMT-Fe presents iron in the interlayer space and oxohydroxide particles on its surface. Both clays present a high CV adsorption capacity that can be modeled by a two-site Langmuir equation. MMT-Fe oxidizes faster and have a higher mineralization rate of adsorbed CV than MMT with Fe(II) or Fe(III) added externally. The oxidation of the adsorbed dye release organics to the solution which are further mineralized in solution. The Fenton oxidation can be modeled by a double exponential decay and photo-Fenton oxidation by a pseudo-first order kinetic model. Photo-Fenton oxidation leads to higher mineralization rates than Fenton. © 2014 Elsevier Ltd. All rights reserved.
format JOUR
author Guz, L.
Curutchet, G.
Torres Sánchez, R.M.
Candal, R.
author_facet Guz, L.
Curutchet, G.
Torres Sánchez, R.M.
Candal, R.
author_sort Guz, L.
title Adsorption of crystal violet on montmorillonite (or iron modified montmorillonite) followed by degradation through Fenton or photo-Fenton type reactions
title_short Adsorption of crystal violet on montmorillonite (or iron modified montmorillonite) followed by degradation through Fenton or photo-Fenton type reactions
title_full Adsorption of crystal violet on montmorillonite (or iron modified montmorillonite) followed by degradation through Fenton or photo-Fenton type reactions
title_fullStr Adsorption of crystal violet on montmorillonite (or iron modified montmorillonite) followed by degradation through Fenton or photo-Fenton type reactions
title_full_unstemmed Adsorption of crystal violet on montmorillonite (or iron modified montmorillonite) followed by degradation through Fenton or photo-Fenton type reactions
title_sort adsorption of crystal violet on montmorillonite (or iron modified montmorillonite) followed by degradation through fenton or photo-fenton type reactions
url http://hdl.handle.net/20.500.12110/paper_22133437_v2_n4_p2344_Guz
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AT curutchetg adsorptionofcrystalvioletonmontmorilloniteorironmodifiedmontmorillonitefollowedbydegradationthroughfentonorphotofentontypereactions
AT torressanchezrm adsorptionofcrystalvioletonmontmorilloniteorironmodifiedmontmorillonitefollowedbydegradationthroughfentonorphotofentontypereactions
AT candalr adsorptionofcrystalvioletonmontmorilloniteorironmodifiedmontmorillonitefollowedbydegradationthroughfentonorphotofentontypereactions
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