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dc.contributor.author
Arroyave Rodriguez, Jeison Manuel  
dc.contributor.author
Waiman, Carolina Vanesa  
dc.contributor.author
Zanini, Graciela Pilar  
dc.contributor.author
Tan, Wenfeng  
dc.contributor.author
Avena, Marcelo Javier  
dc.date.available
2018-08-17T15:07:10Z  
dc.date.issued
2017-04-24  
dc.identifier.citation
Arroyave Rodriguez, Jeison Manuel; Waiman, Carolina Vanesa; Zanini, Graciela Pilar; Tan, Wenfeng; Avena, Marcelo Javier; Desorption rate of glyphosate from goethite as affected by different entering ligands: Hints on the desorption mechanism; Csiro Publishing; Environmental Chemistry; 14; 5; 24-4-2017; 288-294  
dc.identifier.issn
1448-2517  
dc.identifier.uri
http://hdl.handle.net/11336/56098  
dc.description.abstract
The desorption kinetics of glyphosate (Gly) from goethite was studied in a flow cell using attenuated total reflectance Fourier-transform infrared spectroscopy. Because Gly forms an inner-sphere surface complex by coordinating to Fe atoms at the goethite surface, the desorption process is actually a ligand-exchange reaction, where Gly is the leaving ligand and water molecules or dissolved substances are the entering ligands. A series of possible entering ligands that can be found in nature was tested to evaluate their effect on the desorption kinetics of Gly. Contrarily to expectations, the desorption rate was quite independent of the entering ligand concentration. Moreover, the identity of this ligand (phosphate, citrate, sulfate, oxalate, EDTA, thiocyanate, humic acid, water) had only a small effect on the value of the desorption rate constant. By analogy with the reactivity of transition metal complexes in solution, it is concluded that the rate is mainly controlled by the breaking of the Fe–Gly bond, through a dissociative or a dissociative interchange mechanism. The results are relevant in understanding and predicting the environmental mobility of Gly: irrespective of the identity of the entering ligand, Gly will always desorb from iron (hydr)oxides in nature at nearly the same rate, simplifying calculations and predictions enormously. The importance of studying desorption kinetics using mineral surfaces and environmentally relevant molecules is also highlighted.  
dc.format
application/pdf  
dc.language.iso
eng  
dc.publisher
Csiro Publishing  
dc.rights
info:eu-repo/semantics/openAccess  
dc.rights.uri
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/  
dc.subject
Adsorption  
dc.subject
Glyphosate  
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Goethite  
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Desorption  
dc.subject.classification
Otras Ciencias Químicas  
dc.subject.classification
Ciencias Químicas  
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CIENCIAS NATURALES Y EXACTAS  
dc.title
Desorption rate of glyphosate from goethite as affected by different entering ligands: Hints on the desorption mechanism  
dc.type
info:eu-repo/semantics/article  
dc.type
info:ar-repo/semantics/artículo  
dc.type
info:eu-repo/semantics/publishedVersion  
dc.date.updated
2018-08-10T16:22:22Z  
dc.journal.volume
14  
dc.journal.number
5  
dc.journal.pagination
288-294  
dc.journal.pais
Australia  
dc.journal.ciudad
Collingwood  
dc.description.fil
Fil: Arroyave Rodriguez, Jeison Manuel. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Bahía Blanca. Instituto de Química del Sur. Universidad Nacional del Sur. Departamento de Química. Instituto de Química del Sur; Argentina  
dc.description.fil
Fil: Waiman, Carolina Vanesa. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Bahía Blanca. Instituto de Química del Sur. Universidad Nacional del Sur. Departamento de Química. Instituto de Química del Sur; Argentina  
dc.description.fil
Fil: Zanini, Graciela Pilar. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Bahía Blanca. Instituto de Química del Sur. Universidad Nacional del Sur. Departamento de Química. Instituto de Química del Sur; Argentina  
dc.description.fil
Fil: Tan, Wenfeng. Huazhong Agricultural University; China. Chinese Academy of Sciences; República de China  
dc.description.fil
Fil: Avena, Marcelo Javier. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Bahía Blanca. Instituto de Química del Sur. Universidad Nacional del Sur. Departamento de Química. Instituto de Química del Sur; Argentina  
dc.journal.title
Environmental Chemistry  
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/url/http://www.publish.csiro.au/EN/EN17004  
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/doi/http://dx.doi.org/10.1071/EN17004