A New Environmentally Safe Formulation and of Low Cost for Prolonged Release System of Atrazine and Diuron

Gracy karla da Rocha Cortes, Eunice Fragoso da silva Vieira, Daniel Muniz Oliveira, Antonio Reinaldo Cestari, Maria de Lara Palmeira de Macedo Arguelho

Abstract


Diuron and atrazine were incorporated in new formulations developed with the purpose to improve herbicides action through release systems, as well as to reduce the environmental toxicity. A low cost formulation (ALG/ESC) was obtained by combining sodium alginate (ALG) with fish scales of the Piau fish (ESC) from the Leporinus elongatus species. From the crosslinking of ALG/ESC with CaCl2, the formulation ALG/ESC-CaCl2 was obtained. For ALG/ESC-CaCl2, the results are successful, showing a prolonged release of 3.5 and 4.5 days for atrazine and diuron, respectively. Based on parameters of an empirical equation used to fit the herbicide release data, it appears that the release systems of diuron and atrazine from ALG/ESC-CaCl2 are by diffusion processes due to anomalous transport, which did not follow Fick’s laws of diffusion.

 

DOI: http://dx.doi.org/10.17807/orbital.v9i3.994



Keywords


atrazine; diuron; fish scales; prolonged release; sodium alginate

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Orbital: The Electronic Journal of Chemistry (e-ISSN 1984-6428) is a quarterly scientific journal published by the Institute of Chemistry of the Universidade Federal de Mato Grosso do Sul, Brazil. Orbital is a peer-reviewed, open-access journal.