Transport of simazine in unsaturated sandy soil and predictions of its leaching under hypothetical field conditions

Simple item page
dc.contributor.authorSuarez, Francisco
dc.contributor.authorBachmann, Jaime
dc.contributor.authorMunoz, Jose F.
dc.contributor.authorOrtiz, Cristian
dc.contributor.authorTyler, Scott W.
dc.contributor.authorAlister, Claudio
dc.contributor.authorKogan, Marcelo
dc.date.accessioned2024-01-10T13:09:50Z
dc.date.available2024-01-10T13:09:50Z
dc.date.issued2007
dc.description.abstractThe potential contamination of groundwater by herbicides is often controlled by processes in the vadose zone, through which herbicides travel before entering groundwater. In the vadose zone, both physical and chemical processes affect the fate and transport of herbicides, therefore it is important to represent these processes by mathematical models to predict contaminant movement. To simulate the movement of simazine, a herbicide commonly used in Chilean vineyards, batch and miscible displacement column experiments were performed on a disturbed sandy soil to quantify the primary parameters and processes of simazine transport. Chloride (Cl-) was used as a non-reactive tracer, and simazine as the reactive tracer. The Hydrus-1D model was used to estimate the parameters by inversion from the breakthrough curves of the columns and to evaluate the potential groundwater contamination in a sandy soil from the Casablanca Valley, Chile. The two-site, chemical non-equilibrium model was observed to best represent the experimental results of the miscible displacement experiments in laboratory soil columns. Predictions of transport under hypothetical field conditions using the same soil from the column experiments were made for 40 years by applying herbicide during the first 20 years, and then halting the application and considering different rates of groundwater recharge. For recharge rates smaller than 84 mm year(-1), the predicted concentration of simazine at a depth of I m is below the U.S. EPA's maximum contaminant levels (4 mu g L-1). After eight years of application at a groundwater recharge rate of 180 mm year I (approximately 50% of the annual rainfall), simazine was found to reach the groundwater (located at 1 m depth) at a higher concentration (more than 40 mu g L-1) than the existing guidelines in the USA and Europe. (c) 2007 Elsevier B.V.. All rights reserved.
dc.fechaingreso.objetodigital27-03-2024
dc.format.extent12 páginas
dc.fuente.origenWOS
dc.identifier.doi10.1016/j.jconhyd.2007.05.009
dc.identifier.eissn1873-6009
dc.identifier.issn0169-7722
dc.identifier.pubmedidMEDLINE:17604874
dc.identifier.urihttps://doi.org/10.1016/j.jconhyd.2007.05.009
dc.identifier.urihttps://repositorio.uc.cl/handle/11534/77682
dc.identifier.wosidWOS:000251842100002
dc.information.autorucIngeniería;Muñoz J.F.;S/I;99634
dc.issue.numero3-4
dc.language.isoen
dc.nota.accesocontenido parcial
dc.pagina.final177
dc.pagina.inicio166
dc.publisherELSEVIER
dc.revistaJOURNAL OF CONTAMINANT HYDROLOGY
dc.rightsacceso restringido
dc.subjectherbicide transport
dc.subjectnon-equilibrium sorption
dc.subjectbreakthrough curve
dc.subjectHydrus-1D
dc.subjectsimazine
dc.subject2-SITE 2-REGION MODELS
dc.subjectIN-GROUND WATER
dc.subjectNONEQUILIBRIUM TRANSPORT
dc.subjectSOLUTE TRANSPORT
dc.subjectHYDRAULIC CONDUCTIVITY
dc.subjectDEGRADATION
dc.subjectHERBICIDES
dc.subjectATRAZINE
dc.subjectEQUILIBRIUM
dc.subjectSORPTION
dc.subject.ods02 Zero Hunger
dc.subject.odspa02 Hambre cero
dc.titleTransport of simazine in unsaturated sandy soil and predictions of its leaching under hypothetical field conditions
dc.typeartículo
dc.volumen94
sipa.codpersvinculados99634
sipa.indexWOS
sipa.trazabilidadCarga SIPA;09-01-2024
Files
Original bundle
Now showing 1 - 1 of 1
Thumbnail Image
Name:
2024-03-27. Transport of simazine in unsaturated sandy soil and predictions of its leaching under hypothetical field conditions.pdf
Size:
3.42 KB
Format:
Adobe Portable Document Format
Description:
Download
Collections
Artículos de revistas