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- W2050879979 abstract "A novel controlled release formulation (CRF) of the herbicide imazapyr (IMP) was designed to reduce its leaching, which causes soil and water contamination. The anionic herbicide IMP was bound to polydiallyldimethylammonium-chloride (PDADMAC)−montmorillonite composites. PDADMAC adsorption reached a high loading of polymer, which resulted in charge reversal of the clay and promoted IMP binding. The composites were characterized by Fourier transform infrared, zeta potential, and X-ray diffraction measurements, indicating electrostatic interactions of the polycation with the surface, polycation intercalation in the clay and suggesting a configuration as loops and tails on the surface at high loadings. IMP binding to the composites is affected by polycation loading and flocculation. Upon adding high concentrations of IMP to a composite of 0.16 g/g, we obtained high herbicide loadings (66% active ingredient). IMP release from the CRFs applied on a thin layer of soil was substantially slower than its release from the commercial formulation (Arsenal). Accordingly, soil column bioassays indicated reduced herbicide leaching (nearly 2-fold) upon applying the CRFs while maintaining good herbicidal activity. The new PDADMAC-clay formulations are promising from the environmental and weed control management points of view." @default.
- W2050879979 created "2016-06-24" @default.
- W2050879979 creator A5040840781 @default.
- W2050879979 creator A5051459110 @default.
- W2050879979 date "2008-01-26" @default.
- W2050879979 modified "2023-10-12" @default.
- W2050879979 title "Characterizing and Designing Polycation−Clay Nanocomposites As a Basis for Imazapyr Controlled Release Formulations" @default.
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- W2050879979 doi "https://doi.org/10.1021/es7023753" @default.
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