Organic compounds in the environment: soil sorption of acidic pesticides: modeling pH effects.
Autor(a) principal: | |
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Data de Publicação: | 2003 |
Outros Autores: | |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Institucional da EMBRAPA (Repository Open Access to Scientific Information from EMBRAPA - Alice) |
Texto Completo: | http://www.alice.cnptia.embrapa.br/alice/handle/doc/15098 |
Resumo: | A model of acidic pesticide sorption in soils was developed from theoretical modeling and experimental data, which initially considered a combination of a strongly acidic pesticide and a variable-charge soil with high clay content. Contribution of 2,4-D [(2,4-dichlorophenoxy) acetic acid] anionic-form sorption was small when compared with molecular sorption. Dissociation of 2,4-D was not sufficient to explain the variation in Kd as a function of pH. Accessibility of soil organic functional groups able to interact with the pesticide (conformational changes) as a function of organic matter dissociation was proposed to explain the observed differences in sorption. Experimental 2,4-D sorption data and Koc values from literature for flumetsulam [N-(2,6-difluorophenyl)-5-methyl [1,2,4] triazolo [1,5-a] pyrimidine-2-sulfonamide] and sulfentrazone |
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Organic compounds in the environment: soil sorption of acidic pesticides: modeling pH effects.SorçãoAgrotóxicoModelo de simulaçãoPhA model of acidic pesticide sorption in soils was developed from theoretical modeling and experimental data, which initially considered a combination of a strongly acidic pesticide and a variable-charge soil with high clay content. Contribution of 2,4-D [(2,4-dichlorophenoxy) acetic acid] anionic-form sorption was small when compared with molecular sorption. Dissociation of 2,4-D was not sufficient to explain the variation in Kd as a function of pH. Accessibility of soil organic functional groups able to interact with the pesticide (conformational changes) as a function of organic matter dissociation was proposed to explain the observed differences in sorption. Experimental 2,4-D sorption data and Koc values from literature for flumetsulam [N-(2,6-difluorophenyl)-5-methyl [1,2,4] triazolo [1,5-a] pyrimidine-2-sulfonamide] and sulfentrazoneCLAUDIO APARECIDO SPADOTTO, SGTEA. G. HORNSBY, Soil and Water Science Dep., Univ. of Florida.SPADOTTO, C. A.HORNSBY, A. G.2017-09-19T00:13:07Z2017-09-19T00:13:07Z2006-10-0420032019-01-07T11:11:11Zinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleJournal of Environmental Quality, Madison, v. 32, p. 949-956, 2003.http://www.alice.cnptia.embrapa.br/alice/handle/doc/15098enginfo:eu-repo/semantics/openAccessreponame:Repositório Institucional da EMBRAPA (Repository Open Access to Scientific Information from EMBRAPA - Alice)instname:Empresa Brasileira de Pesquisa Agropecuária (Embrapa)instacron:EMBRAPA2017-09-19T00:13:07Zoai:www.alice.cnptia.embrapa.br:doc/15098Repositório InstitucionalPUBhttps://www.alice.cnptia.embrapa.br/oai/requestopendoar:21542017-09-19T00:13:07falseRepositório InstitucionalPUBhttps://www.alice.cnptia.embrapa.br/oai/requestcg-riaa@embrapa.bropendoar:21542017-09-19T00:13:07Repositório Institucional da EMBRAPA (Repository Open Access to Scientific Information from EMBRAPA - Alice) - Empresa Brasileira de Pesquisa Agropecuária (Embrapa)false |
dc.title.none.fl_str_mv |
Organic compounds in the environment: soil sorption of acidic pesticides: modeling pH effects. |
title |
Organic compounds in the environment: soil sorption of acidic pesticides: modeling pH effects. |
spellingShingle |
Organic compounds in the environment: soil sorption of acidic pesticides: modeling pH effects. SPADOTTO, C. A. Sorção Agrotóxico Modelo de simulação Ph |
title_short |
Organic compounds in the environment: soil sorption of acidic pesticides: modeling pH effects. |
title_full |
Organic compounds in the environment: soil sorption of acidic pesticides: modeling pH effects. |
title_fullStr |
Organic compounds in the environment: soil sorption of acidic pesticides: modeling pH effects. |
title_full_unstemmed |
Organic compounds in the environment: soil sorption of acidic pesticides: modeling pH effects. |
title_sort |
Organic compounds in the environment: soil sorption of acidic pesticides: modeling pH effects. |
author |
SPADOTTO, C. A. |
author_facet |
SPADOTTO, C. A. HORNSBY, A. G. |
author_role |
author |
author2 |
HORNSBY, A. G. |
author2_role |
author |
dc.contributor.none.fl_str_mv |
CLAUDIO APARECIDO SPADOTTO, SGTE A. G. HORNSBY, Soil and Water Science Dep., Univ. of Florida. |
dc.contributor.author.fl_str_mv |
SPADOTTO, C. A. HORNSBY, A. G. |
dc.subject.por.fl_str_mv |
Sorção Agrotóxico Modelo de simulação Ph |
topic |
Sorção Agrotóxico Modelo de simulação Ph |
description |
A model of acidic pesticide sorption in soils was developed from theoretical modeling and experimental data, which initially considered a combination of a strongly acidic pesticide and a variable-charge soil with high clay content. Contribution of 2,4-D [(2,4-dichlorophenoxy) acetic acid] anionic-form sorption was small when compared with molecular sorption. Dissociation of 2,4-D was not sufficient to explain the variation in Kd as a function of pH. Accessibility of soil organic functional groups able to interact with the pesticide (conformational changes) as a function of organic matter dissociation was proposed to explain the observed differences in sorption. Experimental 2,4-D sorption data and Koc values from literature for flumetsulam [N-(2,6-difluorophenyl)-5-methyl [1,2,4] triazolo [1,5-a] pyrimidine-2-sulfonamide] and sulfentrazone |
publishDate |
2003 |
dc.date.none.fl_str_mv |
2003 2006-10-04 2017-09-19T00:13:07Z 2017-09-19T00:13:07Z 2019-01-07T11:11:11Z |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/publishedVersion info:eu-repo/semantics/article |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
Journal of Environmental Quality, Madison, v. 32, p. 949-956, 2003. http://www.alice.cnptia.embrapa.br/alice/handle/doc/15098 |
identifier_str_mv |
Journal of Environmental Quality, Madison, v. 32, p. 949-956, 2003. |
url |
http://www.alice.cnptia.embrapa.br/alice/handle/doc/15098 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.source.none.fl_str_mv |
reponame:Repositório Institucional da EMBRAPA (Repository Open Access to Scientific Information from EMBRAPA - Alice) instname:Empresa Brasileira de Pesquisa Agropecuária (Embrapa) instacron:EMBRAPA |
instname_str |
Empresa Brasileira de Pesquisa Agropecuária (Embrapa) |
instacron_str |
EMBRAPA |
institution |
EMBRAPA |
reponame_str |
Repositório Institucional da EMBRAPA (Repository Open Access to Scientific Information from EMBRAPA - Alice) |
collection |
Repositório Institucional da EMBRAPA (Repository Open Access to Scientific Information from EMBRAPA - Alice) |
repository.name.fl_str_mv |
Repositório Institucional da EMBRAPA (Repository Open Access to Scientific Information from EMBRAPA - Alice) - Empresa Brasileira de Pesquisa Agropecuária (Embrapa) |
repository.mail.fl_str_mv |
cg-riaa@embrapa.br |
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1794503442143641600 |