Glyphosate behavior at soil and mineral-water interfaces

Adsorption isotherms and surface coverage of glyphosate, N-phosphonomethylglycine (PMG), in aqueous suspensions of three Argentine soils with different mineralogical composition were measured as a function of PMG concentration and pH. Zeta potential curves for PMG/soils system were also determined....

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Autor principal:	Pessagno, Romina C.
Publicado:	2008
Materias:	Adsorption Clays Glyphosate Soils Surface complexes Glyphosate behavior Biological materials Isotherms Minerals pH effects Water glyphosate iron mineral montmorillonite n phosphonomethylglycine organic matter unclassified drug adsorption chemical composition clay isotherm soil article Langmuir isotherm pH proton transport zeta potential Argentina Bentonite Environmental Monitoring Glycine Herbicides Humic Substances Hydrogen-Ion Concentration Iron Soil Pollutants Water Pollutants South America
Acceso en línea:	https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_02697491_v153_n1_p53_Pessagno http://hdl.handle.net/20.500.12110/paper_02697491_v153_n1_p53_Pessagno
Aporte de:	Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires

id	paper:paper_02697491_v153_n1_p53_Pessagno
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spelling	paper:paper_02697491_v153_n1_p53_Pessagno2023-06-08T15:24:27Z Glyphosate behavior at soil and mineral-water interfaces Pessagno, Romina C. Adsorption Clays Glyphosate Soils Surface complexes Glyphosate behavior Surface complexes Biological materials Isotherms Minerals pH effects Water Soils glyphosate iron mineral montmorillonite n phosphonomethylglycine organic matter unclassified drug adsorption chemical composition clay glyphosate iron isotherm montmorillonite organic matter soil adsorption article isotherm Langmuir isotherm pH proton transport soil zeta potential Adsorption Argentina Bentonite Environmental Monitoring Glycine Herbicides Humic Substances Hydrogen-Ion Concentration Iron Soil Pollutants Water Pollutants Argentina South America Adsorption isotherms and surface coverage of glyphosate, N-phosphonomethylglycine (PMG), in aqueous suspensions of three Argentine soils with different mineralogical composition were measured as a function of PMG concentration and pH. Zeta potential curves for PMG/soils system were also determined. Montmorillonite and soil sample surface charges were negative and increased as the amount of adsorbed PMG increased, showing that the surface complexes are more negative than those formed during the surface protonation. PMG adsorption on soils were described using Langmuir isotherms and the affinity constants, and the maximum surface coverage was estimated at pH 4 and 7 using a two-term Langmuir isotherm, the mineralogical composition percentages, and maximum surface coverage and Langmuir constants for pure minerals. The influence of organic matter (OM) and iron content of soils on the PMG adsorption was evaluated. The surface coverage of PMG decreased when the OM and iron content decreased for minerals and soils. © 2007 Elsevier Ltd. All rights reserved. Fil:Pessagno, R.C. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. 2008 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_02697491_v153_n1_p53_Pessagno http://hdl.handle.net/20.500.12110/paper_02697491_v153_n1_p53_Pessagno
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 Clays Glyphosate Soils Surface complexes Glyphosate behavior Surface complexes Biological materials Isotherms Minerals pH effects Water Soils glyphosate iron mineral montmorillonite n phosphonomethylglycine organic matter unclassified drug adsorption chemical composition clay glyphosate iron isotherm montmorillonite organic matter soil adsorption article isotherm Langmuir isotherm pH proton transport soil zeta potential Adsorption Argentina Bentonite Environmental Monitoring Glycine Herbicides Humic Substances Hydrogen-Ion Concentration Iron Soil Pollutants Water Pollutants Argentina South America
spellingShingle	Adsorption Clays Glyphosate Soils Surface complexes Glyphosate behavior Surface complexes Biological materials Isotherms Minerals pH effects Water Soils glyphosate iron mineral montmorillonite n phosphonomethylglycine organic matter unclassified drug adsorption chemical composition clay glyphosate iron isotherm montmorillonite organic matter soil adsorption article isotherm Langmuir isotherm pH proton transport soil zeta potential Adsorption Argentina Bentonite Environmental Monitoring Glycine Herbicides Humic Substances Hydrogen-Ion Concentration Iron Soil Pollutants Water Pollutants Argentina South America Pessagno, Romina C. Glyphosate behavior at soil and mineral-water interfaces
topic_facet	Adsorption Clays Glyphosate Soils Surface complexes Glyphosate behavior Surface complexes Biological materials Isotherms Minerals pH effects Water Soils glyphosate iron mineral montmorillonite n phosphonomethylglycine organic matter unclassified drug adsorption chemical composition clay glyphosate iron isotherm montmorillonite organic matter soil adsorption article isotherm Langmuir isotherm pH proton transport soil zeta potential Adsorption Argentina Bentonite Environmental Monitoring Glycine Herbicides Humic Substances Hydrogen-Ion Concentration Iron Soil Pollutants Water Pollutants Argentina South America
description	Adsorption isotherms and surface coverage of glyphosate, N-phosphonomethylglycine (PMG), in aqueous suspensions of three Argentine soils with different mineralogical composition were measured as a function of PMG concentration and pH. Zeta potential curves for PMG/soils system were also determined. Montmorillonite and soil sample surface charges were negative and increased as the amount of adsorbed PMG increased, showing that the surface complexes are more negative than those formed during the surface protonation. PMG adsorption on soils were described using Langmuir isotherms and the affinity constants, and the maximum surface coverage was estimated at pH 4 and 7 using a two-term Langmuir isotherm, the mineralogical composition percentages, and maximum surface coverage and Langmuir constants for pure minerals. The influence of organic matter (OM) and iron content of soils on the PMG adsorption was evaluated. The surface coverage of PMG decreased when the OM and iron content decreased for minerals and soils. © 2007 Elsevier Ltd. All rights reserved.
author	Pessagno, Romina C.
author_facet	Pessagno, Romina C.
author_sort	Pessagno, Romina C.
title	Glyphosate behavior at soil and mineral-water interfaces
title_short	Glyphosate behavior at soil and mineral-water interfaces
title_full	Glyphosate behavior at soil and mineral-water interfaces
title_fullStr	Glyphosate behavior at soil and mineral-water interfaces
title_full_unstemmed	Glyphosate behavior at soil and mineral-water interfaces
title_sort	glyphosate behavior at soil and mineral-water interfaces
publishDate	2008
url	https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_02697491_v153_n1_p53_Pessagno http://hdl.handle.net/20.500.12110/paper_02697491_v153_n1_p53_Pessagno
work_keys_str_mv	AT pessagnorominac glyphosatebehavioratsoilandmineralwaterinterfaces
_version_	1768544684663111680

Glyphosate behavior at soil and mineral-water interfaces

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