Ozone treatment for pesticide removal from carrots: Optimization by response surface methodology

• Autor(a) principal: Souza, Lauana Pellanda de
• Data de Publicação: 2017
• Outros Autores: Faroni, Lêda Rita D'Antonino, Heleno, Fernanda Fernandes, Pinto, Frederico Garcia, Queiroz, Maria Eliana Lopes Ribeiro de, Prates, Lucas Henrique Figueiredo
• Tipo de documento: Artigo
• Idioma: eng
• Título da fonte: LOCUS Repositório Institucional da UFV
• Texto Completo: https://doi.org/10.1016/j.foodchem.2017.09.134; http://www.locus.ufv.br/handle/123456789/18742
• topic: Daucus carota L.; Difenoconazole; Linuron; Storage; Solid-liquid extraction with low temperature partition; Gas chromatography

The present study aimed to optimize ozone (O3) treatments, as gas and dissolved in water, to remove difenoconazole and linuron in carrots. We employed a central composite design to study three variables governing the efficacy of treatments: O3 concentration, temperature and treatment time. The temperature did not influence the efficacy of treatments. The removal percentage of pesticides increases with increases in ozone concentration and the time of treatment. O3 application promoted the removal of more than 80% of pesticides when the roots were exposed for approximately 120 min at 5 and 10 mg L−1, respectively, in treatments with O3 as gas and dissolved in water. After storage, pesticide removal was higher than 98% for difenoconazole and 95% for linuron. The degradation products from the pesticides resulting from treatment were monitored, but none were found. This is the first report demonstrating the removal of difenoconazole and linuron from carrots by ozone.