Clay-herbicide complexes to retard picloram leaching in soil
An approach for minimizing the risk of ground water contamination for highly mobile pesticides is to enhance the soil sorption process through the application of the pesticide together with a sorbent which limits the amount of pesticide immediately available for undesirable leaching losses. In this work, a number of clays exchanged with different inorganic and organic cations were assayed as sorbents of the acidic herbicide picloram (4-amino-3,5,6-trichloropyridine-2-carboxylic acid) and the ability of three selected clays to retard the release of picloram into water and to reduce picloram leaching through a soil column was investigated. For the selected clays, Fe3+-saturated Wyoming montmorillonite (Fe-SW), octadecylammonium-treated Arizona montmorillonite (ODA-SA(1)) and hexadecyltrimethylammonium-saturated Arizona montomorillonite (HDTMA-SA(2)), two types of clay picloram complexes ( a physical mixture, PM, and a strongly-sorbed complex, SC) were prepared. All clay picloram complexes yielded slow release of the herbicide and retarded its vertical movement through soil columns compared to the free technical compound, showing that clay pesticide complexes prepared from selectively-modified clays may be useful in reducing rapid leaching of highly mobile pesticides such as picloram
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Gordon and Breach Science Publishers
2002
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dig-irnas-es-10261-608272018-09-10T10:27:00Z Clay-herbicide complexes to retard picloram leaching in soil Celis, R. Hermosín, M.C. Cornejo, J. Carrizosa, M. J. Cornejo, J. An approach for minimizing the risk of ground water contamination for highly mobile pesticides is to enhance the soil sorption process through the application of the pesticide together with a sorbent which limits the amount of pesticide immediately available for undesirable leaching losses. In this work, a number of clays exchanged with different inorganic and organic cations were assayed as sorbents of the acidic herbicide picloram (4-amino-3,5,6-trichloropyridine-2-carboxylic acid) and the ability of three selected clays to retard the release of picloram into water and to reduce picloram leaching through a soil column was investigated. For the selected clays, Fe3+-saturated Wyoming montmorillonite (Fe-SW), octadecylammonium-treated Arizona montmorillonite (ODA-SA(1)) and hexadecyltrimethylammonium-saturated Arizona montomorillonite (HDTMA-SA(2)), two types of clay picloram complexes ( a physical mixture, PM, and a strongly-sorbed complex, SC) were prepared. All clay picloram complexes yielded slow release of the herbicide and retarded its vertical movement through soil columns compared to the free technical compound, showing that clay pesticide complexes prepared from selectively-modified clays may be useful in reducing rapid leaching of highly mobile pesticides such as picloram Peer Reviewed 2012-11-21T19:36:28Z 2012-11-21T19:36:28Z 2002 2012-11-21T19:36:30Z artículo http://purl.org/coar/resource_type/c_6501 doi: 10.1080/03067310290018785 issn: 0306-7319 e-issn: 1029-0397 International Journal of Environmental Analytical Chemistry 82(8-9): 503- 517 (2002) http://hdl.handle.net/10261/60827 10.1080/03067310290018785 en none Gordon and Breach Science Publishers |
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An approach for minimizing the risk of ground water contamination for highly mobile pesticides is to enhance the soil sorption process through the application of the pesticide together with a sorbent which limits the amount of pesticide immediately available for undesirable leaching losses. In this work, a number of clays exchanged with different inorganic and organic cations were assayed as sorbents of the acidic herbicide picloram (4-amino-3,5,6-trichloropyridine-2-carboxylic acid) and the ability of three selected clays to retard the release of picloram into water and to reduce picloram leaching through a soil column was investigated. For the selected clays, Fe3+-saturated Wyoming montmorillonite (Fe-SW), octadecylammonium-treated Arizona montmorillonite (ODA-SA(1)) and hexadecyltrimethylammonium-saturated Arizona montomorillonite (HDTMA-SA(2)), two types of clay picloram complexes ( a physical mixture, PM, and a strongly-sorbed complex, SC) were prepared. All clay picloram complexes yielded slow release of the herbicide and retarded its vertical movement through soil columns compared to the free technical compound, showing that clay pesticide complexes prepared from selectively-modified clays may be useful in reducing rapid leaching of highly mobile pesticides such as picloram |
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artículo |
author |
Celis, R. Hermosín, M.C. Cornejo, J. Carrizosa, M. J. Cornejo, J. |
spellingShingle |
Celis, R. Hermosín, M.C. Cornejo, J. Carrizosa, M. J. Cornejo, J. Clay-herbicide complexes to retard picloram leaching in soil |
author_facet |
Celis, R. Hermosín, M.C. Cornejo, J. Carrizosa, M. J. Cornejo, J. |
author_sort |
Celis, R. |
title |
Clay-herbicide complexes to retard picloram leaching in soil |
title_short |
Clay-herbicide complexes to retard picloram leaching in soil |
title_full |
Clay-herbicide complexes to retard picloram leaching in soil |
title_fullStr |
Clay-herbicide complexes to retard picloram leaching in soil |
title_full_unstemmed |
Clay-herbicide complexes to retard picloram leaching in soil |
title_sort |
clay-herbicide complexes to retard picloram leaching in soil |
publisher |
Gordon and Breach Science Publishers |
publishDate |
2002 |
url |
http://hdl.handle.net/10261/60827 |
work_keys_str_mv |
AT celisr clayherbicidecomplexestoretardpicloramleachinginsoil AT hermosinmc clayherbicidecomplexestoretardpicloramleachinginsoil AT cornejoj clayherbicidecomplexestoretardpicloramleachinginsoil AT carrizosamj clayherbicidecomplexestoretardpicloramleachinginsoil AT cornejoj clayherbicidecomplexestoretardpicloramleachinginsoil |
_version_ |
1777664434990219264 |