Solubilization of herbicides by single and mixed commercial surfactants

Solubilization of herbicides by single and mixed commercial surfactants

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8 páginas.-- 3 figuras.-- 6 tablas.-- 43 referencias.-- Appendix A. Supplementary data Solubilization in single and equimolar mixed surfactants of MST (Fig. S1), FL (Fig. S2) and MTZ (Fig. S3). Supplementary data to this article can be found online at http://dx.doi.org/10.1016/j.scitotenv.2015.08.008

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Main Authors: Galán Jiménez, C., Gómez-Pantoja, Eulalia, Morillo González, Esmeralda, Undabeytia López, Tomás
Format: artículo biblioteca
Language:English
Published: Elsevier
Subjects:Ethoxylated surfactants, Mixed surfactants, Polar solutes, Solubilization,
Online Access:http://hdl.handle.net/10261/121532
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spelling dig-irnas-es-10261-1215322018-09-13T10:13:40Z Solubilization of herbicides by single and mixed commercial surfactants Galán Jiménez, C. Gómez-Pantoja, Eulalia Morillo González, Esmeralda Undabeytia López, Tomás Ethoxylated surfactants Mixed surfactants Polar solutes Solubilization 8 páginas.-- 3 figuras.-- 6 tablas.-- 43 referencias.-- Appendix A. Supplementary data Solubilization in single and equimolar mixed surfactants of MST (Fig. S1), FL (Fig. S2) and MTZ (Fig. S3). Supplementary data to this article can be found online at http://dx.doi.org/10.1016/j.scitotenv.2015.08.008 The solubilization capabilities of micellar solutions of three single surfactants, two alcohol alkoxylates B048 and B266, and the tallow alkyl ethoxylated amine ET15, and their equimolar mixed solutions toward the herbicides flurtamone (FL), metribuzin (MTZ) and mesotrione (MST) were investigated. The solubilization capacity was quantified in terms of the molar solubilization ratio (MSR), critical micellar concentration (CMC), micelle-water partition coefficient (Kmc), binding constant (K1), number of aggregation (Nagg) and Stern-Volmer constant (Ksv). The herbicides were greatly solubilized into different loci of the micelles: FL within the inner hydrophobic core, MST at the micelle/water interface and MTZ in the palisade region. Equimolar binary surfactant mixtures did not improve the solubilization of herbicides over those of single components, with the exception of MTZ by the B266/ET15 system which enhanced solubilization by 10-20%. This enhanced solubilization of MTZ was due to an increased number of micelles that arise from both the intermediate Nagg relative to that of the single surfactants and the lower CMC. The use of Ksv values was a better predictor of the solubilization of polar molecules within binary mixtures of these surfactants than the interaction parameter βM from regular solution theory (RST). The results herein suggest that the use of mixed surfactant systems for the solubilization of polar molecules in environmental remediation technologies may be very limited in scope, without clear advantages over the use of single surfactant systems. © 2015 Elsevier B.V. This research was supported by the MEC project CTM2009-07425 and the Junta de Andalucía Project P09-RNM4581. Both projects received funding from the European Social Fund. It was also supported by the ENPI-CBCMED Project Nanowat (ref. I-B/2.1/049). M.C. Galán-Jiménez acknowledges a research contract from Junta de Andalucía in the frame of project P09-RNM4581. The authors are grateful to Campi y Jove S.A (Barcelona, Spain) for the supply of the commercial surfactants. Peer reviewed 2015-08 artículo http://purl.org/coar/resource_type/c_6501 Science of the Total Environment 538: 262 -269 (2015) http://hdl.handle.net/10261/121532 10.1016/j.scitotenv.2015.08.008 0048-9697 en Preprint http://dx.doi.org/10.1016/j.scitotenv.2015.08.008 Sí open Elsevier
institution IRNAS ES
collection DSpace
country España
countrycode ES
component Bibliográfico
access En linea
databasecode dig-irnas-es
tag biblioteca
region Europa del Sur
libraryname Biblioteca del IRNAS España
language English
topic Ethoxylated surfactants
Mixed surfactants
Polar solutes
Solubilization
Ethoxylated surfactants
Mixed surfactants
Polar solutes
Solubilization
spellingShingle Ethoxylated surfactants
Mixed surfactants
Polar solutes
Solubilization
Ethoxylated surfactants
Mixed surfactants
Polar solutes
Solubilization
Galán Jiménez, C.
Gómez-Pantoja, Eulalia
Morillo González, Esmeralda
Undabeytia López, Tomás
Solubilization of herbicides by single and mixed commercial surfactants
description 8 páginas.-- 3 figuras.-- 6 tablas.-- 43 referencias.-- Appendix A. Supplementary data Solubilization in single and equimolar mixed surfactants of MST (Fig. S1), FL (Fig. S2) and MTZ (Fig. S3). Supplementary data to this article can be found online at http://dx.doi.org/10.1016/j.scitotenv.2015.08.008
format artículo
topic_facet Ethoxylated surfactants
Mixed surfactants
Polar solutes
Solubilization
author Galán Jiménez, C.
Gómez-Pantoja, Eulalia
Morillo González, Esmeralda
Undabeytia López, Tomás
author_facet Galán Jiménez, C.
Gómez-Pantoja, Eulalia
Morillo González, Esmeralda
Undabeytia López, Tomás
author_sort Galán Jiménez, C.
title Solubilization of herbicides by single and mixed commercial surfactants
title_short Solubilization of herbicides by single and mixed commercial surfactants
title_full Solubilization of herbicides by single and mixed commercial surfactants
title_fullStr Solubilization of herbicides by single and mixed commercial surfactants
title_full_unstemmed Solubilization of herbicides by single and mixed commercial surfactants
title_sort solubilization of herbicides by single and mixed commercial surfactants
publisher Elsevier
url http://hdl.handle.net/10261/121532
work_keys_str_mv AT galanjimenezc solubilizationofherbicidesbysingleandmixedcommercialsurfactants
AT gomezpantojaeulalia solubilizationofherbicidesbysingleandmixedcommercialsurfactants
AT morillogonzalezesmeralda solubilizationofherbicidesbysingleandmixedcommercialsurfactants
AT undabeytialopeztomas solubilizationofherbicidesbysingleandmixedcommercialsurfactants
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