English   español  
Please use this identifier to cite or link to this item: http://hdl.handle.net/10261/155591
Share/Impact:
Statistics
logo share SHARE logo core CORE   Add this article to your Mendeley library MendeleyBASE

Visualizar otros formatos: MARC | Dublin Core | RDF | ORE | MODS | METS | DIDL
Exportar a otros formatos:

Title

Herbicide monitoring in soil, runoff waters and sediments in an olive orchard

AuthorsCalderón, M.J. ; Luna, Elena de; Gómez Calero, José Alfonso ; Hermosín, M.C.
KeywordsContamination
Leaching
Sediments
Oxyfluorfen
Terbuthylazine
Olive orchard
Issue Date1-Nov-2016
PublisherElsevier
CitationScience of The Total Environment 569–570: 416-422 (2016)
AbstractOccurrences of surface water contamination by herbicides in areas where olive orchards are established reveal a need to understand soil processes affecting herbicide fate at field scale for this popular Mediterranean crop. A monitoring study with two herbicides (terbuthylazine and oxyfluorfen) in the first 2 cm of soil, runoff waters, and sediments, was carried out after under natural rainfall conditions following winter herbicide application. At the end of the 107 day field experiment, no residues of the soil applied terbuthylazine were recovered, whereas 42% of the oxyfluorfen applied remained in the top soil. Very low levels of both herbicides were measured in runoff waters; however, concentrations were slightly higher for terbuthylazine (0.53% of applied) than for oxyfluorfen (0.03% of applied), relating to their respective water solubilities. Congruent with soil residue data, 38.15% of the applied oxyfluorfen was found in runoff-sediment, compared to only 0.46% for terbuthylazine. Accordingly, the herbicide soil distribution coefficients measured within runoff field tanks was much greater for oxyfluorfen (Kd = 3098) than for terbuthylazine (Kd = 1.57). The herbicide oxyfluorfen is co-transported with sediment in runoff, remaining trapped and/or adsorbed to soil particle aggregates, due in part to its low water solubility. In contrast, terbuthylazine soil dissipation may be associated more so with leaching processes, favored by its high water solubility, low sorption, and slow degradation. By comparing these two herbicides, our results reaffirm the importance of herbicide physico-chemical properties in dictating their behavior in soil and also suggest that herbicides with low solubility, as seen in the case oxyfluorfen, remain susceptible to offsite transport associated with sediments.
Description7 páginas.-- 4 figuras.-- 3 tablas.-- 31 referencias.-- Supplementary data to this article can be found online at http://dx.doi.org/10.1016/j.scitotenv.2016.06.126
Publisher version (URL)http://dx.doi.org/10.1016/j.scitotenv.2016.06.126
URIhttp://hdl.handle.net/10261/155591
DOI10.1016/j.scitotenv.2016.06.126
ISSN0048-9697
Appears in Collections:(IAS) Artículos
(IRNAS) Artículos
Files in This Item:
File Description SizeFormat 
accesoRestringido.pdf15,38 kBAdobe PDFThumbnail
View/Open
Show full item record
Review this work
 

Related articles:


WARNING: Items in Digital.CSIC are protected by copyright, with all rights reserved, unless otherwise indicated.