Adsorption of picloram herbicide on montmorillonite: Kinetic and equilibrium studies

The kinetics of the adsorption of picloram (PCM) onto montmorillonite (Mt) was studied in situ by attenuated total reflectance Fourier-transform infrared spectra (ATR-FTIR). Pseudo-first-order, pseudo-second-order, intra-particle diffusion and mixed surface reaction intra-particle diffusion-controll...

Descripción completa

Guardado en:

Detalles Bibliográficos
Autores principales:	Brown, José Luis Marco, Areco, María del Mar
Publicado:	2014
Materias:	Adsorption isotherms Adsorption kinetics Herbicide Montmorillonite Picloram Adsorption Clay minerals Diffusion in solids Dyes Fourier transform infrared spectroscopy Kinetics Pyridine Surface reactions Weed control Adsorption equilibrium isotherms Attenuated total reflectance Fourier transform infra reds Inner sphere complexes Intra-particle diffusion Montmorillonite surface Herbicides montmorillonite picloram adsorption adsorption kinetics aqueous solution article bioavailability biosorption diffusion equilibrium constant infrared spectroscopy isotherm kinetics priority journal reaction analysis scanning electron microscopy
Acceso en línea:	https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_09277757_v449_n1_p121_MarcoBrown http://hdl.handle.net/20.500.12110/paper_09277757_v449_n1_p121_MarcoBrown
Aporte de:	Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires

id	paper:paper_09277757_v449_n1_p121_MarcoBrown
record_format	dspace
spelling	paper:paper_09277757_v449_n1_p121_MarcoBrown2023-06-08T15:52:01Z Adsorption of picloram herbicide on montmorillonite: Kinetic and equilibrium studies Brown, José Luis Marco Areco, María del Mar Adsorption isotherms Adsorption kinetics Herbicide Montmorillonite Picloram Adsorption Adsorption isotherms Clay minerals Diffusion in solids Dyes Fourier transform infrared spectroscopy Kinetics Pyridine Surface reactions Weed control Adsorption equilibrium isotherms Adsorption kinetics Attenuated total reflectance Fourier transform infra reds Inner sphere complexes Intra-particle diffusion Montmorillonite surface Picloram Herbicides montmorillonite picloram adsorption adsorption kinetics aqueous solution article bioavailability biosorption diffusion equilibrium constant infrared spectroscopy isotherm kinetics priority journal reaction analysis scanning electron microscopy The kinetics of the adsorption of picloram (PCM) onto montmorillonite (Mt) was studied in situ by attenuated total reflectance Fourier-transform infrared spectra (ATR-FTIR). Pseudo-first-order, pseudo-second-order, intra-particle diffusion and mixed surface reaction intra-particle diffusion-controlled kinetic models were applied to the experimental results. The latter was the model that best represented the experimental results. The adsorption equilibrium isotherms revealed the presence of two independent adsorption processes on different surface sites. The adsorption isotherms normalized by the surface area were fitted with the Langmuir and Freundlich models to obtain the respective parameters.Due to the anionic form of PCM, the adsorption onto the external clay mineral surface sites followed by the entrance of the PCM molecule into the Mt basal space in a less energetically favorable pathway was proposed. The interaction of PCM with montmorillonite surface sites through nitrogen of the pyridine ring and carboxylic group by forming an inner sphere complex was confirmed by ATR-FTIR. © 2014 Elsevier B.V. Fil:Marco-Brown, J.L. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Areco, M.M. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. 2014 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_09277757_v449_n1_p121_MarcoBrown http://hdl.handle.net/20.500.12110/paper_09277757_v449_n1_p121_MarcoBrown
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 isotherms Adsorption kinetics Herbicide Montmorillonite Picloram Adsorption Adsorption isotherms Clay minerals Diffusion in solids Dyes Fourier transform infrared spectroscopy Kinetics Pyridine Surface reactions Weed control Adsorption equilibrium isotherms Adsorption kinetics Attenuated total reflectance Fourier transform infra reds Inner sphere complexes Intra-particle diffusion Montmorillonite surface Picloram Herbicides montmorillonite picloram adsorption adsorption kinetics aqueous solution article bioavailability biosorption diffusion equilibrium constant infrared spectroscopy isotherm kinetics priority journal reaction analysis scanning electron microscopy
spellingShingle	Adsorption isotherms Adsorption kinetics Herbicide Montmorillonite Picloram Adsorption Adsorption isotherms Clay minerals Diffusion in solids Dyes Fourier transform infrared spectroscopy Kinetics Pyridine Surface reactions Weed control Adsorption equilibrium isotherms Adsorption kinetics Attenuated total reflectance Fourier transform infra reds Inner sphere complexes Intra-particle diffusion Montmorillonite surface Picloram Herbicides montmorillonite picloram adsorption adsorption kinetics aqueous solution article bioavailability biosorption diffusion equilibrium constant infrared spectroscopy isotherm kinetics priority journal reaction analysis scanning electron microscopy Brown, José Luis Marco Areco, María del Mar Adsorption of picloram herbicide on montmorillonite: Kinetic and equilibrium studies
topic_facet	Adsorption isotherms Adsorption kinetics Herbicide Montmorillonite Picloram Adsorption Adsorption isotherms Clay minerals Diffusion in solids Dyes Fourier transform infrared spectroscopy Kinetics Pyridine Surface reactions Weed control Adsorption equilibrium isotherms Adsorption kinetics Attenuated total reflectance Fourier transform infra reds Inner sphere complexes Intra-particle diffusion Montmorillonite surface Picloram Herbicides montmorillonite picloram adsorption adsorption kinetics aqueous solution article bioavailability biosorption diffusion equilibrium constant infrared spectroscopy isotherm kinetics priority journal reaction analysis scanning electron microscopy
description	The kinetics of the adsorption of picloram (PCM) onto montmorillonite (Mt) was studied in situ by attenuated total reflectance Fourier-transform infrared spectra (ATR-FTIR). Pseudo-first-order, pseudo-second-order, intra-particle diffusion and mixed surface reaction intra-particle diffusion-controlled kinetic models were applied to the experimental results. The latter was the model that best represented the experimental results. The adsorption equilibrium isotherms revealed the presence of two independent adsorption processes on different surface sites. The adsorption isotherms normalized by the surface area were fitted with the Langmuir and Freundlich models to obtain the respective parameters.Due to the anionic form of PCM, the adsorption onto the external clay mineral surface sites followed by the entrance of the PCM molecule into the Mt basal space in a less energetically favorable pathway was proposed. The interaction of PCM with montmorillonite surface sites through nitrogen of the pyridine ring and carboxylic group by forming an inner sphere complex was confirmed by ATR-FTIR. © 2014 Elsevier B.V.
author	Brown, José Luis Marco Areco, María del Mar
author_facet	Brown, José Luis Marco Areco, María del Mar
author_sort	Brown, José Luis Marco
title	Adsorption of picloram herbicide on montmorillonite: Kinetic and equilibrium studies
title_short	Adsorption of picloram herbicide on montmorillonite: Kinetic and equilibrium studies
title_full	Adsorption of picloram herbicide on montmorillonite: Kinetic and equilibrium studies
title_fullStr	Adsorption of picloram herbicide on montmorillonite: Kinetic and equilibrium studies
title_full_unstemmed	Adsorption of picloram herbicide on montmorillonite: Kinetic and equilibrium studies
title_sort	adsorption of picloram herbicide on montmorillonite: kinetic and equilibrium studies
publishDate	2014
url	https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_09277757_v449_n1_p121_MarcoBrown http://hdl.handle.net/20.500.12110/paper_09277757_v449_n1_p121_MarcoBrown
work_keys_str_mv	AT brownjoseluismarco adsorptionofpicloramherbicideonmontmorillonitekineticandequilibriumstudies AT arecomariadelmar adsorptionofpicloramherbicideonmontmorillonitekineticandequilibriumstudies
_version_	1768541618667782144

Adsorption of picloram herbicide on montmorillonite: Kinetic and equilibrium studies

Ejemplares similares