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Title

Inclusion of the herbicide 2,4-dichlorophenoxyacetic acid (2,4-D) with β-cyclodextrin by different processing methods

AuthorsGinés, J.M.; Pérez-Martínez, José Ignacio; Arias Blanco, M. J.; Moyano Méndez, José Ramón; Morillo González, Esmeralda ; Ruíz-Conde, Antonio ; Sánchez-Soto, Pedro José
Issue Date1996
PublisherPergamon Press
CitationChemosphere 33(2): 321-334 (1996)
AbstractThe interaction of the herbicide 2,4-Dichlorophenoxyacetic acid (2,4-D) with β-Cyclodextrin produces the formation of a new inclusion compound in solution and in solid state. XRD, FTIR, DSC and SEM techniques have allowed to investigate the inclusion process of the three processing methods (co-precipitation, spray-drying and kneading) under test. Inclusion of 2,4-D in β-CD in solution was also studied by phase solubility, being determined for the complex an apparent stability constant of 336 M-1. At the solid state, co-precipitation and spray-drying were found to yield an inclusion complex in 1:1 stoichiometry. From these systems, it was attained an increase of 2,4-D aqueous dissolution rate as compared with the uncomplexed herbicide, the spray-dried outcomed being the most effective one. This finding would allow a more rational application of 2,4-D and thus diminish its risks as potential pollutant of ground waters and soils.
URIhttp://hdl.handle.net/10261/62187
DOI10.1016/0045-6535(96)00175-0
Identifiersdoi: 10.1016/0045-6535(96)00175-0
issn: 0045-6535
e-issn: 1879-1298
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