Sorption, desorption and leaching potential of sulfonylurea herbicides in Argentinean soils
The sulfonylurea (SUs) herbicides are used to control broadleaf weeds and some grasses in a variety of crops. They have become popular because of their low application rates, low mammalian toxicity and an outstanding herbicidal activity. Sorption is a major process influencing the fate of pesticide...
| Autores principales: | , , |
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| Formato: | info:ar-repo/semantics/artículo |
| Lenguaje: | Inglés |
| Publicado: |
2018
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| Materias: | |
| Acceso en línea: | http://hdl.handle.net/20.500.12123/2109 http://dx.doi.org/10.1080/03601234.2015.999583 |
| _version_ | 1855034905481707520 |
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| author | Azcarate, Mariela Pamela Montoya, Jorgelina Ceferina Koskinen, William C. |
| author_browse | Azcarate, Mariela Pamela Koskinen, William C. Montoya, Jorgelina Ceferina |
| author_facet | Azcarate, Mariela Pamela Montoya, Jorgelina Ceferina Koskinen, William C. |
| author_sort | Azcarate, Mariela Pamela |
| collection | INTA Digital |
| description | The sulfonylurea (SUs) herbicides are used to control broadleaf weeds and some grasses in a variety of crops. They have become popular because of their low application rates, low mammalian toxicity and an outstanding herbicidal activity. Sorption is a
major process influencing the fate of pesticides in soil. The objective of this study was to characterize sorption–desorption of
four sulfonylurea herbicides: metsulfuron-methyl (methyl 2-[(4-methoxy-6-methyl-1,3,5-triazin-2-yl)carbamoylsulfamoyl)]
benzoate), sulfometuron-methyl (methyl 2-[(4,6-dimethylpyrimidin-2-yl)carbamoylsulfamoyl]benzoate), rimsulfuron (1-(4,6-
dimethoxypyrimidin-2-yl)-3-(3-ethylsulfonyl-2-pyridylsulfonyl)urea) and nicosulfuron (2-[(4,6-dimethoxypyrimidin-2-yl)
carbamoylsulfamoyl]-N,N-dimethylnicotinamide) from different soil horizons of different landscape positions. Sorption was
studied in the laboratory by batch equilibration method. Sorption coefficients (Kd-SE) showed that rimsulfuron (Kd-SE D 1.18 to
2.08 L kg -1) and nicosulfuron (Kd-SE D 0.02 to 0.47 L kg -1) were more highly sorbed than metsulfuron-methyl (Kd-SE D 0.00 to
0.05 L kg -1) and sulfometuron-methyl (Kd-SE D 0.00 to 0.05 L kg -1). Sorption coefficients (Kd-SE) were correlated with pH and
organic carbon content. All four herbicides exhibited desorption hysteresis where the desorption coefficients (Kd-D) > Kd-SE. To
estimate the leaching potential, Koc and ground-water ubiquity score (GUS) were used to calculate the half-life (t1/2) required
to be classified as “leacher” or “nonleacher”. According to the results, rimsulfuron and nicosulfuron herbicides would be
classified as leachers, but factors such as landscape position, soil depth and the rate of decomposition in surface and subsurface
soils could change the classification. In contrast, these factors do not affect classification of sulfometuron-methyl and
metsulfuron-methyl; they would rank as leachers. |
| format | info:ar-repo/semantics/artículo |
| id | INTA2109 |
| institution | Instituto Nacional de Tecnología Agropecuaria (INTA -Argentina) |
| language | Inglés |
| publishDate | 2018 |
| publishDateRange | 2018 |
| publishDateSort | 2018 |
| record_format | dspace |
| spelling | INTA21092018-03-26T16:26:08Z Sorption, desorption and leaching potential of sulfonylurea herbicides in Argentinean soils Azcarate, Mariela Pamela Montoya, Jorgelina Ceferina Koskinen, William C. Sorción Herbicidas de Sulfonilurea Lixiviación Horizontes del Suelo Suelo Sorption Pesticide Toxicity Leaching Soil Horizons Sulfonylurea Herbicides Argentina The sulfonylurea (SUs) herbicides are used to control broadleaf weeds and some grasses in a variety of crops. They have become popular because of their low application rates, low mammalian toxicity and an outstanding herbicidal activity. Sorption is a major process influencing the fate of pesticides in soil. The objective of this study was to characterize sorption–desorption of four sulfonylurea herbicides: metsulfuron-methyl (methyl 2-[(4-methoxy-6-methyl-1,3,5-triazin-2-yl)carbamoylsulfamoyl)] benzoate), sulfometuron-methyl (methyl 2-[(4,6-dimethylpyrimidin-2-yl)carbamoylsulfamoyl]benzoate), rimsulfuron (1-(4,6- dimethoxypyrimidin-2-yl)-3-(3-ethylsulfonyl-2-pyridylsulfonyl)urea) and nicosulfuron (2-[(4,6-dimethoxypyrimidin-2-yl) carbamoylsulfamoyl]-N,N-dimethylnicotinamide) from different soil horizons of different landscape positions. Sorption was studied in the laboratory by batch equilibration method. Sorption coefficients (Kd-SE) showed that rimsulfuron (Kd-SE D 1.18 to 2.08 L kg -1) and nicosulfuron (Kd-SE D 0.02 to 0.47 L kg -1) were more highly sorbed than metsulfuron-methyl (Kd-SE D 0.00 to 0.05 L kg -1) and sulfometuron-methyl (Kd-SE D 0.00 to 0.05 L kg -1). Sorption coefficients (Kd-SE) were correlated with pH and organic carbon content. All four herbicides exhibited desorption hysteresis where the desorption coefficients (Kd-D) > Kd-SE. To estimate the leaching potential, Koc and ground-water ubiquity score (GUS) were used to calculate the half-life (t1/2) required to be classified as “leacher” or “nonleacher”. According to the results, rimsulfuron and nicosulfuron herbicides would be classified as leachers, but factors such as landscape position, soil depth and the rate of decomposition in surface and subsurface soils could change the classification. In contrast, these factors do not affect classification of sulfometuron-methyl and metsulfuron-methyl; they would rank as leachers. Fil: Azcarate, Mariela Pamela. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Anguil; Argentina Fil: Montoya, Jorgelina Ceferina. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Anguil; Argentina Fil: Koskinen, William C. Department of Agriculture. Agricultural Research Service. Soil and Water Management Research Unit; Estados Unidos 2018-03-23T15:48:04Z 2018-03-23T15:48:04Z 2015-02-25 info:ar-repo/semantics/artículo info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion http://hdl.handle.net/20.500.12123/2109 0360-1234 1532-4109 (Online) http://dx.doi.org/10.1080/03601234.2015.999583 eng info:eu-repograntAgreement/INTA/PNNAT/1128041/AR./Gestion de sistemas agropecuarios y agroindustriales para reducir la contaminación. info:eu-repograntAgreement/INTA/PNNAT/1128043/AR./Los agroquímicos como fuente de contaminación difusa en agroecosistemas. info:eu-repo/semantics/restrictedAccess application/pdf Journal of environmental science and health, Part B 50 : 229–237. (2015) |
| spellingShingle | Sorción Herbicidas de Sulfonilurea Lixiviación Horizontes del Suelo Suelo Sorption Pesticide Toxicity Leaching Soil Horizons Sulfonylurea Herbicides Argentina Azcarate, Mariela Pamela Montoya, Jorgelina Ceferina Koskinen, William C. Sorption, desorption and leaching potential of sulfonylurea herbicides in Argentinean soils |
| title | Sorption, desorption and leaching potential of sulfonylurea herbicides in Argentinean soils |
| title_full | Sorption, desorption and leaching potential of sulfonylurea herbicides in Argentinean soils |
| title_fullStr | Sorption, desorption and leaching potential of sulfonylurea herbicides in Argentinean soils |
| title_full_unstemmed | Sorption, desorption and leaching potential of sulfonylurea herbicides in Argentinean soils |
| title_short | Sorption, desorption and leaching potential of sulfonylurea herbicides in Argentinean soils |
| title_sort | sorption desorption and leaching potential of sulfonylurea herbicides in argentinean soils |
| topic | Sorción Herbicidas de Sulfonilurea Lixiviación Horizontes del Suelo Suelo Sorption Pesticide Toxicity Leaching Soil Horizons Sulfonylurea Herbicides Argentina |
| url | http://hdl.handle.net/20.500.12123/2109 http://dx.doi.org/10.1080/03601234.2015.999583 |
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