Environmental Behaviour of Metolachlor and Diuron in a Tropical Soil in the Central Region of Brazil

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dc.contributor.authorDores, Eliana F. G. C.
dc.contributor.authorSpadotto, Claudio A.
dc.contributor.authorWeber, Oscarlina L. S.
dc.contributor.authorCarbo, Leandro
dc.contributor.authorVecchiato, Antonio B.
dc.contributor.authorPinto, Alicio A.
dc.contributor.institutionUniv Fed Mato Grosso
dc.contributor.institutionEmpresa Brasileira de Pesquisa Agropecuária (EMBRAPA)
dc.contributor.institutionUniversidade Estadual Paulista (Unesp)
dc.date.accessioned2014-05-20T15:31:38Z
dc.date.available2014-05-20T15:31:38Z
dc.date.issued2009-02-01
dc.description.abstractThe 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 mu 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 mu 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.en
dc.description.affiliationUniv Fed Mato Grosso, Dept Chem, ICET, BR-78060900 Cuiaba, Mato Grosso, Brazil
dc.description.affiliationEmpresa Brasileira de Pesquisa Agropecuária (EMBRAPA) Environm, BR-13820000 São Paulo, Brazil
dc.description.affiliationUniv Estadual Paulista, Posgrad Chem, Inst Chem, BR-14801970 São Paulo, Brazil
dc.description.affiliationUniv Fed Mato Grosso, Dept Geol, ICET, BR-78060900 Cuiaba, Mato Grosso, Brazil
dc.description.affiliationUnespUniv Estadual Paulista, Posgrad Chem, Inst Chem, BR-14801970 São Paulo, Brazil
dc.description.sponsorshipFACUAL (Fundo de Apoio a Cultura do Algodao)
dc.format.extent175-183
dc.identifierhttp://dx.doi.org/10.1007/s11270-008-9801-1
dc.identifier.citationWater Air and Soil Pollution. Dordrecht: Springer, v. 197, n. 1-4, p. 175-183, 2009.
dc.identifier.doi10.1007/s11270-008-9801-1
dc.identifier.issn0049-6979
dc.identifier.urihttp://hdl.handle.net/11449/40712
dc.identifier.wosWOS:000262551000016
dc.language.isoeng
dc.publisherSpringer
dc.relation.ispartofWater, Air, and Soil Pollution
dc.relation.ispartofjcr1.769
dc.relation.ispartofsjr0,589
dc.rights.accessRightsAcesso restrito
dc.sourceWeb of Science
dc.subjectSorptionen
dc.subjectLeachingen
dc.subjectRunoffen
dc.subjectDissipationen
dc.subjectPesticidesen
dc.titleEnvironmental Behaviour of Metolachlor and Diuron in a Tropical Soil in the Central Region of Brazilen
dc.typeArtigo
dcterms.licensehttp://www.springer.com/open+access/authors+rights?SGWID=0-176704-12-683201-0
dcterms.rightsHolderSpringer
unesp.author.orcid0000-0001-5175-3537[1]
unesp.author.orcid0000-0001-5713-1261[2]

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