Kinetic and equilibrium adsorption of two post-harvest fungicides onto copper-exchanged montmorillonite: synergic and antagonistic effects of both fungicides’ presence
- Autores
- Gamba, Martina; Lázaro Martínez, Juan M.; Olivelli, Melisa L.; Yarza, Florencia; Vega, Daniel; Curutchet, Gustavo; Torres Sánchez, Rosa María
- Año de publicación
- 2018
- Idioma
- inglés
- Tipo de recurso
- artículo
- Estado
- versión publicada
- Descripción
- The simultaneous adsorption of both imazalil (IMZ) and thiabendazole (TBZ) fungicides in a Cu2+-exchanged Mt was studied in this work. Kinetic studies were used to determine the rate law which describes the adsorption of individual fungicides onto the adsorbent. Adsorption isotherm of individual and combined fungicides was done to evaluate synergic or antagonistic effects. The Mt-Cu material considerably improved TBZ and/or IMZ adsorption from aqueous suspensions with respect to raw Mt, leading to removal efficiencies higher than 99% after 10 min of contact time for TBZ and IMZ Ci = 15 and 40 mg/L, respectively, when a solid dosage = 1 g/L was used. The adsorption sites involved were determined by a combination of X-ray diffraction (XRD) determinations and electron paramagnetic resonance (EPR), indicating that fungicides were bonded to Cu2+ cations, while the rate limiting step was the formation of coordination bonds. The adsorption mechanism proposed is that of ligand exchange between water and fungicide molecules in the metal coordination sphere. The single-crystal structure for the IMZ-Cu2+ complex indicated that four molecules were bounded to the copper centers, while two molecules of TBZ are bounded to copper explaining the higher IMZ uptake capacity for the Mt-Cu material.
Centro de Tecnología de Recursos Minerales y Cerámica
Consejo Nacional de Investigaciones Científicas y Técnicas - Materia
-
Química
Cu2+-exchanged montmorillonite
Thiabendazole
Imazalil
Adsorption
Crystal structure determination
Copper-imazalil complex - Nivel de accesibilidad
- acceso abierto
- Condiciones de uso
- http://creativecommons.org/licenses/by/4.0/
- Repositorio
- Institución
- Universidad Nacional de La Plata
- OAI Identificador
- oai:sedici.unlp.edu.ar:10915/114766
Ver los metadatos del registro completo
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Kinetic and equilibrium adsorption of two post-harvest fungicides onto copper-exchanged montmorillonite: synergic and antagonistic effects of both fungicides’ presenceGamba, MartinaLázaro Martínez, Juan M.Olivelli, Melisa L.Yarza, FlorenciaVega, DanielCurutchet, GustavoTorres Sánchez, Rosa MaríaQuímicaCu2+-exchanged montmorilloniteThiabendazoleImazalilAdsorptionCrystal structure determinationCopper-imazalil complexThe simultaneous adsorption of both imazalil (IMZ) and thiabendazole (TBZ) fungicides in a Cu2+-exchanged Mt was studied in this work. Kinetic studies were used to determine the rate law which describes the adsorption of individual fungicides onto the adsorbent. Adsorption isotherm of individual and combined fungicides was done to evaluate synergic or antagonistic effects. The Mt-Cu material considerably improved TBZ and/or IMZ adsorption from aqueous suspensions with respect to raw Mt, leading to removal efficiencies higher than 99% after 10 min of contact time for TBZ and IMZ Ci = 15 and 40 mg/L, respectively, when a solid dosage = 1 g/L was used. The adsorption sites involved were determined by a combination of X-ray diffraction (XRD) determinations and electron paramagnetic resonance (EPR), indicating that fungicides were bonded to Cu2+ cations, while the rate limiting step was the formation of coordination bonds. The adsorption mechanism proposed is that of ligand exchange between water and fungicide molecules in the metal coordination sphere. The single-crystal structure for the IMZ-Cu2+ complex indicated that four molecules were bounded to the copper centers, while two molecules of TBZ are bounded to copper explaining the higher IMZ uptake capacity for the Mt-Cu material.Centro de Tecnología de Recursos Minerales y CerámicaConsejo Nacional de Investigaciones Científicas y Técnicas2018info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionArticulohttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfhttp://sedici.unlp.edu.ar/handle/10915/114766enginfo:eu-repo/semantics/altIdentifier/issn/1614-7499info:eu-repo/semantics/altIdentifier/doi/10.1007/s11356-018-3638-yinfo:eu-repo/semantics/openAccesshttp://creativecommons.org/licenses/by/4.0/Creative Commons Attribution 4.0 International (CC BY 4.0)reponame:SEDICI (UNLP)instname:Universidad Nacional de La Platainstacron:UNLP2025-09-03T10:58:56Zoai:sedici.unlp.edu.ar:10915/114766Institucionalhttp://sedici.unlp.edu.ar/Universidad públicaNo correspondehttp://sedici.unlp.edu.ar/oai/snrdalira@sedici.unlp.edu.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:13292025-09-03 10:58:57.006SEDICI (UNLP) - Universidad Nacional de La Platafalse |
dc.title.none.fl_str_mv |
Kinetic and equilibrium adsorption of two post-harvest fungicides onto copper-exchanged montmorillonite: synergic and antagonistic effects of both fungicides’ presence |
title |
Kinetic and equilibrium adsorption of two post-harvest fungicides onto copper-exchanged montmorillonite: synergic and antagonistic effects of both fungicides’ presence |
spellingShingle |
Kinetic and equilibrium adsorption of two post-harvest fungicides onto copper-exchanged montmorillonite: synergic and antagonistic effects of both fungicides’ presence Gamba, Martina Química Cu2+-exchanged montmorillonite Thiabendazole Imazalil Adsorption Crystal structure determination Copper-imazalil complex |
title_short |
Kinetic and equilibrium adsorption of two post-harvest fungicides onto copper-exchanged montmorillonite: synergic and antagonistic effects of both fungicides’ presence |
title_full |
Kinetic and equilibrium adsorption of two post-harvest fungicides onto copper-exchanged montmorillonite: synergic and antagonistic effects of both fungicides’ presence |
title_fullStr |
Kinetic and equilibrium adsorption of two post-harvest fungicides onto copper-exchanged montmorillonite: synergic and antagonistic effects of both fungicides’ presence |
title_full_unstemmed |
Kinetic and equilibrium adsorption of two post-harvest fungicides onto copper-exchanged montmorillonite: synergic and antagonistic effects of both fungicides’ presence |
title_sort |
Kinetic and equilibrium adsorption of two post-harvest fungicides onto copper-exchanged montmorillonite: synergic and antagonistic effects of both fungicides’ presence |
dc.creator.none.fl_str_mv |
Gamba, Martina Lázaro Martínez, Juan M. Olivelli, Melisa L. Yarza, Florencia Vega, Daniel Curutchet, Gustavo Torres Sánchez, Rosa María |
author |
Gamba, Martina |
author_facet |
Gamba, Martina Lázaro Martínez, Juan M. Olivelli, Melisa L. Yarza, Florencia Vega, Daniel Curutchet, Gustavo Torres Sánchez, Rosa María |
author_role |
author |
author2 |
Lázaro Martínez, Juan M. Olivelli, Melisa L. Yarza, Florencia Vega, Daniel Curutchet, Gustavo Torres Sánchez, Rosa María |
author2_role |
author author author author author author |
dc.subject.none.fl_str_mv |
Química Cu2+-exchanged montmorillonite Thiabendazole Imazalil Adsorption Crystal structure determination Copper-imazalil complex |
topic |
Química Cu2+-exchanged montmorillonite Thiabendazole Imazalil Adsorption Crystal structure determination Copper-imazalil complex |
dc.description.none.fl_txt_mv |
The simultaneous adsorption of both imazalil (IMZ) and thiabendazole (TBZ) fungicides in a Cu2+-exchanged Mt was studied in this work. Kinetic studies were used to determine the rate law which describes the adsorption of individual fungicides onto the adsorbent. Adsorption isotherm of individual and combined fungicides was done to evaluate synergic or antagonistic effects. The Mt-Cu material considerably improved TBZ and/or IMZ adsorption from aqueous suspensions with respect to raw Mt, leading to removal efficiencies higher than 99% after 10 min of contact time for TBZ and IMZ Ci = 15 and 40 mg/L, respectively, when a solid dosage = 1 g/L was used. The adsorption sites involved were determined by a combination of X-ray diffraction (XRD) determinations and electron paramagnetic resonance (EPR), indicating that fungicides were bonded to Cu2+ cations, while the rate limiting step was the formation of coordination bonds. The adsorption mechanism proposed is that of ligand exchange between water and fungicide molecules in the metal coordination sphere. The single-crystal structure for the IMZ-Cu2+ complex indicated that four molecules were bounded to the copper centers, while two molecules of TBZ are bounded to copper explaining the higher IMZ uptake capacity for the Mt-Cu material. Centro de Tecnología de Recursos Minerales y Cerámica Consejo Nacional de Investigaciones Científicas y Técnicas |
description |
The simultaneous adsorption of both imazalil (IMZ) and thiabendazole (TBZ) fungicides in a Cu2+-exchanged Mt was studied in this work. Kinetic studies were used to determine the rate law which describes the adsorption of individual fungicides onto the adsorbent. Adsorption isotherm of individual and combined fungicides was done to evaluate synergic or antagonistic effects. The Mt-Cu material considerably improved TBZ and/or IMZ adsorption from aqueous suspensions with respect to raw Mt, leading to removal efficiencies higher than 99% after 10 min of contact time for TBZ and IMZ Ci = 15 and 40 mg/L, respectively, when a solid dosage = 1 g/L was used. The adsorption sites involved were determined by a combination of X-ray diffraction (XRD) determinations and electron paramagnetic resonance (EPR), indicating that fungicides were bonded to Cu2+ cations, while the rate limiting step was the formation of coordination bonds. The adsorption mechanism proposed is that of ligand exchange between water and fungicide molecules in the metal coordination sphere. The single-crystal structure for the IMZ-Cu2+ complex indicated that four molecules were bounded to the copper centers, while two molecules of TBZ are bounded to copper explaining the higher IMZ uptake capacity for the Mt-Cu material. |
publishDate |
2018 |
dc.date.none.fl_str_mv |
2018 |
dc.type.none.fl_str_mv |
info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Articulo http://purl.org/coar/resource_type/c_6501 info:ar-repo/semantics/articulo |
format |
article |
status_str |
publishedVersion |
dc.identifier.none.fl_str_mv |
http://sedici.unlp.edu.ar/handle/10915/114766 |
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http://sedici.unlp.edu.ar/handle/10915/114766 |
dc.language.none.fl_str_mv |
eng |
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eng |
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info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/4.0/ Creative Commons Attribution 4.0 International (CC BY 4.0) |
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openAccess |
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http://creativecommons.org/licenses/by/4.0/ Creative Commons Attribution 4.0 International (CC BY 4.0) |
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