Reduced metribuzin pollution with phosphatidylcholine-clay formulations

Pest Management Science
Tomás UndabeytiaTrinidad Sánchez-Verdejo

Abstract

Metribuzin is a widely used herbicide that has been identified as a groundwater contaminant. In this study, slow-release formulations of metribuzin were designed by encapsulating the active ingredient in phosphatidylcholine (PC) vesicles and adsorbing the vesicles onto montmorillonite. The maximum active ingredient content in the slow-release formulations was 246 g kg(-1) . Infrared spectroscopy results revealed that the hydrophobic interactions between metribuzin and the alkyl chains on PC were necessary for encapsulation. In addition, water bridges connecting the herbicide and the PC headgroup enhanced the solubility of metribuzin in PC. Adsorption experiments in soils were performed to evaluate the relationship between sorption and leaching. Funnel experiments in a sandy soil revealed that the herbicide was not irreversibly retained in the formulation matrix. In soil column experiments, PC-clay formulations enhanced herbicide accumulation and biological activity in the top soil layer relative to a commercial formulation. PC-clay formulations also reduced the dissipation of metribuzin by a factor of 1.6-2.5. A reduction in the recommended dose of metribuzin can be achieved by employing PC-clay formulations, which reduces the ...Continue Reading

References

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Citations

Dec 2, 2015·Journal of Environmental Science and Health. Part. B, Pesticides, Food Contaminants, and Agricultural Wastes·Tatiana VolovaEkaterina Shishatskaya
Aug 28, 2015·The Science of the Total Environment·María Del Carmen Galán-JiménezTomás Undabeytia
Oct 6, 2015·The Science of the Total Environment·David PeñaManuel Ramírez
Oct 14, 2014·The Science of the Total Environment·Marina Rubio-BellidoJaime Villaverde
Jun 30, 2016·Journal of Agricultural and Food Chemistry·Anatoly N BoyandinTatiana Volova
Jan 27, 2019·Pest Management Science·Francisco A MacíasJosé Mg Molinillo
Sep 16, 2016·Environmental Science and Pollution Research International·Tatiana VolovaEkaterina Shishatskaya
Mar 10, 2017·Journal of Environmental Science and Health. Part. B, Pesticides, Food Contaminants, and Agricultural Wastes·Shailesh K JainMukesh K Saini
Mar 11, 2017·Environmental Science and Pollution Research International·Jose L Marco-BrownMaría Dos Santos Afonso
Apr 15, 2021·Journal of Environmental Science and Health. Part. B, Pesticides, Food Contaminants, and Agricultural Wastes·Anatoly N Boyandin, Eugenia A Kazantseva

Related Concepts

Lexone
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Adsorption
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Herbicides
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