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Effect of pH and dissolved organic matter on the photochemical fate of acetamiprid
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Orientador(es)
Resumo(s)
In this study the effect of pH and dissolved organic matter (DOM) on the photodegradation
rate of acetamiprid (ACT) was studied. Observed photodegradation rate constants in the range
of 0.0010 – 0.0026 h-1 and 24 – 36 h-1 were obtained using a solar simulator (290-800 nm) and
a medium pressure mercury (MP Hg) lamp, respectively. In both experiments an increase in pH
from 5 to 9 did not significantly change the photodegradation rate constant of ACT. A different
behaviour was found for ACT degradation in the presence of DOM. When samples were
irradiated with MP Hg lamp the observed photodegradation rate constant of ACT decreased
with an increase of DOM concentration.
Descrição
Trabalho apresentado em 9th European Conference on Pesticides and Related Organic Micropolluants in the Environment, 4-7 de outubro 2016, Santiago de Compostela, Espanha
Palavras-chave
Neonicotinoid insecticides DOM Photolysis Solar simulator MP Hg lamp