Environmental behaviour of metolachlor and diuron in a tropical soil in the Central Region of Brazil.
Autor(a) principal: | |
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Data de Publicação: | 2008 |
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/15592 |
Resumo: | The environmental behaviour of metolachlor and diuron was studied in the Central-western region of Brazil, by means of a field study where six experimental plots were installed. The soil was classified as a Latosol, and the soil horizons were characterized. Sorption of metolachlor and diuron was evaluated in laboratory batch experiments. Metolachlor and diuron were applied to the experimental plots on uncultivated soil in October 2003. From this date to March 2004, the following processes were studied: leaching, runoff and dissipation in top soil. K oc of metolachlor varied from 179 to 264 mL g-1 in the soil horizons. K oc of diuron in the Ap horizon was 917 mL g-1, decreasing significantly in the deeper horizons. Field dissipation half-lives of metolachlor and diuron were 18 and 15 days, respectively. In percolated water, metolachlor was detected in concentrations ranging from 0.02 to 2.84 ?g L-1. In runoff water and sediment, metolachlor was detected in decreasing concentrations throughout the period of study. Losses of 0.02% and 0.54% of the applied amount by leaching and runoff, respectively, were observed confirming the high mobility of this herbicide in the environment. In percolated water, diuron was detected with low frequency but in relatively high concentrations (up to 6.29 ?g L-1). In runoff water and soil, diuron was detected in decreasing concentrations until 70 days after application, totalizing 13.9% during the whole sampling period. These results show the importance of practices to reduce runoff avoiding surface water contamination by these pesticides, particularly diuron. |
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Environmental behaviour of metolachlor and diuron in a tropical soil in the Central Region of Brazil.ÁguaAgrotóxicoPoluição AmbientalThe environmental behaviour of metolachlor and diuron was studied in the Central-western region of Brazil, by means of a field study where six experimental plots were installed. The soil was classified as a Latosol, and the soil horizons were characterized. Sorption of metolachlor and diuron was evaluated in laboratory batch experiments. Metolachlor and diuron were applied to the experimental plots on uncultivated soil in October 2003. From this date to March 2004, the following processes were studied: leaching, runoff and dissipation in top soil. K oc of metolachlor varied from 179 to 264 mL g-1 in the soil horizons. K oc of diuron in the Ap horizon was 917 mL g-1, decreasing significantly in the deeper horizons. Field dissipation half-lives of metolachlor and diuron were 18 and 15 days, respectively. In percolated water, metolachlor was detected in concentrations ranging from 0.02 to 2.84 ?g L-1. In runoff water and sediment, metolachlor was detected in decreasing concentrations throughout the period of study. Losses of 0.02% and 0.54% of the applied amount by leaching and runoff, respectively, were observed confirming the high mobility of this herbicide in the environment. In percolated water, diuron was detected with low frequency but in relatively high concentrations (up to 6.29 ?g L-1). In runoff water and soil, diuron was detected in decreasing concentrations until 70 days after application, totalizing 13.9% during the whole sampling period. These results show the importance of practices to reduce runoff avoiding surface water contamination by these pesticides, particularly diuron.Eliana F. G. C.Dores, UFMT; CLAUDIO APARECIDO SPADOTTO, SGTE; Oscarlina L. S.Weber, UFMT; Leandro Carbo, UNESP-Campus de Araraquara; Antonio B. Vecchiato, UFMT; Alicio A. Pinto, UFMT.DORES, E. F. G. C.SPADOTTO, C. A.WEBER, O. L. S.CARBO, L.VECCHIATO, A. B.PINTO, A. A.2016-11-23T23:01:15Z2016-11-23T23:01:15Z2008-12-2220082016-11-23T23:01:15Zinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleWater, Air and Soil Pollution, v. 197, p. 175?183, 2009.http://www.alice.cnptia.embrapa.br/alice/handle/doc/15592enginfo: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:EMBRAPA2017-08-16T03:48:49Zoai:www.alice.cnptia.embrapa.br:doc/15592Repositório InstitucionalPUBhttps://www.alice.cnptia.embrapa.br/oai/requestopendoar:21542017-08-16T03:48:49falseRepositório InstitucionalPUBhttps://www.alice.cnptia.embrapa.br/oai/requestcg-riaa@embrapa.bropendoar:21542017-08-16T03:48:49Repositório 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 |
Environmental behaviour of metolachlor and diuron in a tropical soil in the Central Region of Brazil. |
title |
Environmental behaviour of metolachlor and diuron in a tropical soil in the Central Region of Brazil. |
spellingShingle |
Environmental behaviour of metolachlor and diuron in a tropical soil in the Central Region of Brazil. DORES, E. F. G. C. Água Agrotóxico Poluição Ambiental |
title_short |
Environmental behaviour of metolachlor and diuron in a tropical soil in the Central Region of Brazil. |
title_full |
Environmental behaviour of metolachlor and diuron in a tropical soil in the Central Region of Brazil. |
title_fullStr |
Environmental behaviour of metolachlor and diuron in a tropical soil in the Central Region of Brazil. |
title_full_unstemmed |
Environmental behaviour of metolachlor and diuron in a tropical soil in the Central Region of Brazil. |
title_sort |
Environmental behaviour of metolachlor and diuron in a tropical soil in the Central Region of Brazil. |
author |
DORES, E. F. G. C. |
author_facet |
DORES, E. F. G. C. SPADOTTO, C. A. WEBER, O. L. S. CARBO, L. VECCHIATO, A. B. PINTO, A. A. |
author_role |
author |
author2 |
SPADOTTO, C. A. WEBER, O. L. S. CARBO, L. VECCHIATO, A. B. PINTO, A. A. |
author2_role |
author author author author author |
dc.contributor.none.fl_str_mv |
Eliana F. G. C.Dores, UFMT; CLAUDIO APARECIDO SPADOTTO, SGTE; Oscarlina L. S.Weber, UFMT; Leandro Carbo, UNESP-Campus de Araraquara; Antonio B. Vecchiato, UFMT; Alicio A. Pinto, UFMT. |
dc.contributor.author.fl_str_mv |
DORES, E. F. G. C. SPADOTTO, C. A. WEBER, O. L. S. CARBO, L. VECCHIATO, A. B. PINTO, A. A. |
dc.subject.por.fl_str_mv |
Água Agrotóxico Poluição Ambiental |
topic |
Água Agrotóxico Poluição Ambiental |
description |
The environmental behaviour of metolachlor and diuron was studied in the Central-western region of Brazil, by means of a field study where six experimental plots were installed. The soil was classified as a Latosol, and the soil horizons were characterized. Sorption of metolachlor and diuron was evaluated in laboratory batch experiments. Metolachlor and diuron were applied to the experimental plots on uncultivated soil in October 2003. From this date to March 2004, the following processes were studied: leaching, runoff and dissipation in top soil. K oc of metolachlor varied from 179 to 264 mL g-1 in the soil horizons. K oc of diuron in the Ap horizon was 917 mL g-1, decreasing significantly in the deeper horizons. Field dissipation half-lives of metolachlor and diuron were 18 and 15 days, respectively. In percolated water, metolachlor was detected in concentrations ranging from 0.02 to 2.84 ?g L-1. In runoff water and sediment, metolachlor was detected in decreasing concentrations throughout the period of study. Losses of 0.02% and 0.54% of the applied amount by leaching and runoff, respectively, were observed confirming the high mobility of this herbicide in the environment. In percolated water, diuron was detected with low frequency but in relatively high concentrations (up to 6.29 ?g L-1). In runoff water and soil, diuron was detected in decreasing concentrations until 70 days after application, totalizing 13.9% during the whole sampling period. These results show the importance of practices to reduce runoff avoiding surface water contamination by these pesticides, particularly diuron. |
publishDate |
2008 |
dc.date.none.fl_str_mv |
2008-12-22 2008 2016-11-23T23:01:15Z 2016-11-23T23:01:15Z 2016-11-23T23:01:15Z |
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 |
Water, Air and Soil Pollution, v. 197, p. 175?183, 2009. http://www.alice.cnptia.embrapa.br/alice/handle/doc/15592 |
identifier_str_mv |
Water, Air and Soil Pollution, v. 197, p. 175?183, 2009. |
url |
http://www.alice.cnptia.embrapa.br/alice/handle/doc/15592 |
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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1794503428578213888 |