Por favor, use este identificador para citar o enlazar a este item:
http://hdl.handle.net/10261/60825
COMPARTIR / EXPORTAR:
SHARE CORE BASE | |
Visualizar otros formatos: MARC | Dublin Core | RDF | ORE | MODS | METS | DIDL | DATACITE | |
Título: | Bioavailability of the herbicide 2,4-D formulated with organoclays |
Autor: | Hermosín, M.C. CSIC ORCID; Celis, Rafael CSIC ORCID ; Facenda, G. CSIC; Carrizosa, M. J.; Ortega Calvo, J. J. CSIC ORCID ; Cornejo, J. CSIC ORCID | Fecha de publicación: | 2006 | Editor: | Elsevier | Citación: | Soil Biology and Biochemistry 38(8): 2117- 2124 (2006) | Resumen: | Research on organoclays as sorbents of pesticides has shown the usefulness of these materials as pesticide supports to prolong the efficacy of soil-applied pesticides and to reduce the large transport losses that usually affect pesticides applied in an immediately available form. Nevertheless, little information exists on the availability of organoclay-formulated pesticides for bacterial degradation. In this work, laboratory experiments were conducted to determine the adsorption-desorption behavior of two hexadecyltrimethylammonium-treated Arizona montmorillonites (SA-HDTMA50 and SA-HDTMA100) for the herbicide 2,4-dichlorophenoxyacetic acid (2,4-D), and to evaluate the ability of these organoclays to slow the release of the herbicide and to reduce herbicide leaching losses as compared to the free (technical) compound. The kinetics of mineralization of free and formulated 2,4-D by adapted bacteria was also determined. Organoclay-based formulations of 2,4-D displayed slow release properties in water and reduced herbicide leaching through soil columns, while maintained a herbicidal efficacy similar to that of the free (technical) 2,4-D. The total amount of 14C-2,4-D mineralized at the end of the biodegradation experiment (t=130 h) ranged between 30% and 46% of the formulated herbicide, which represented 53-81% of the amount of free 2,4-D mineralized in the same conditions. The release, leaching, and mineralization patterns of the formulated herbicide were found to depend both on the affinity of the organoclay for the herbicide and on the degree of interaction promoted during the preparation of the herbicide-organoclay complex. This suggests the possibility to select diverse preparations to achieve the desired release, leaching and biodegradation behavior. | URI: | http://hdl.handle.net/10261/60825 | DOI: | 10.1016/j.soilbio.2006.01.032 | Identificadores: | doi: 10.1016/j.soilbio.2006.01.032 issn: 0038-0717 |
Aparece en las colecciones: | (IRNAS) Artículos |
Ficheros en este ítem:
Fichero | Descripción | Tamaño | Formato | |
---|---|---|---|---|
accesoRestringido.pdf | 15,38 kB | Adobe PDF | Visualizar/Abrir |
CORE Recommender
SCOPUSTM
Citations
62
checked on 01-abr-2024
WEB OF SCIENCETM
Citations
58
checked on 24-feb-2024
Page view(s)
385
checked on 23-abr-2024
Download(s)
109
checked on 23-abr-2024
Google ScholarTM
Check
Altmetric
Altmetric
NOTA: Los ítems de Digital.CSIC están protegidos por copyright, con todos los derechos reservados, a menos que se indique lo contrario.