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Publicação
Avaliação do risco de pesticidas individuais e suas misturas em águas de superfície
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Orientador(es)
Resumo(s)
This study aims to evaluate the risk of
pesticides and their mixtures in surface waters
of agricultural areas of the Golegã council.
From 12 pesticides analysed by SPME/
GC-MS, the priority substances alachlor,
atrazine, chlorfenvinphos, chlorpyrifos and
other pollutants (3,4-DCA, ethofumesate,
metolachlor and terbuthylazine) were detected.
Alachlor and chlorpyrifos were determined
with concentrations higher than their
respective environmental quality standards
for surface waters. According to the toxic
unit summation method, only in two samples
collected at Alverca do Campo were expected
elicit effects larger than 50% on Daphnia
and algae, due mainly to chlorfenvinphos
and alachlor, respectively. The application
of this method enables to use the existing
information on risk assessment of individual
pesticides, requiring only more demanding
research and evaluation of the need of risk
mitigation measures for those pesticides with
greater aquatic risk in the mixtures
Descrição
Palavras-chave
aquatic ecosystem environmental risk individual pesticide pesticide mixtures surface water
Contexto Educativo
Citação
"Revista de Ciências Agrárias". ISSN 0871-018x. 35 (2) (2012) 32-42