Development and Evaluation of a Controlled Release System of TBH Herbicide Using Alginate Microparticles

Autor: Daniela Macedo Faria, Sidney Macias Dourado Júnior, João Pedro Lopes do Nascimento, Eloiza da Silva Nunes, Renata Pereira Marques, Luciana Sgarbi Rossino, Jéferson Aparecido Moreto
Jazyk: angličtina
Rok vydání: 2016
Předmět:
Zdroj: Materials Research, Vol 20, Iss 1, Pp 225-235 (2016)
Druh dokumentu: article
ISSN: 1516-1439
1980-5373
DOI: 10.1590/1980-5373-mr-2016-0443
Popis: The development of controlled delivery system formulations has received increasing interest in the agriculture area. Tebuthiuron (TBH) is the most commonly used herbicide for weed control in sugar cane and cotton crops. The TBH and some of its metabolites are detected in surface water by leaching process, evidencing contamination and the need for an efficient process to decrease pesticide residues. The development of a controlled system release appears as a good solution. The present investigation aimed to study the development and evaluation of alginate microparticles as a delivery system for the TBH. The calcium alginate microparticles were prepared from the crosslinking of sodium alginate by Ca++ containing varied amounts of TBH supplied in CaCl2 aqueous solution. The particle size and morphological analysis of microparticles were determined by optical microscopy (OM) and by field emission gun scanning electron microscopy (FEG-SEM). The encapsulation efficiency and release of TBH studies was accessed by UV-vis spectroscopy. The results show that the polymeric microparticles containing TBH can be obtained successfully through a simple method and is suitable as a controlled release carrier system for herbicides and can be effective for controlling weeds.
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