Organochlorine pesticides in the sediment of lacustrine environments (Lower Rio Doce Basin, ES, Brazil).
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2023
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Resumo
Levels of pesticide were assessed in the sediment of deep and shallow lakes from Lower Rio Doce
Basin (ES) to evaluate the levels of selected organochlorine pesticides (OCPs) in the sediment of
lacustrine environments (shallow lakes x deep lakes). The catchment area of the studied lacustrine
environments is characterized by multiple agricultural activities and human occupations. Sediment
samples were collected monthly from October/2018 to February/2020. Total pesticides were
analyzed in gas chromatography coupled to mass spectrometry (GC-MS). There were detected five
organic pesticides in the sediments, including banned OCPs in developed countries such as DDT
and PCBs. Highest values of DDT and PCBs were detected in the sediment of the deep and shallow
lakes. No seasonal difference was observed in the concentration of PCOs in lake and shallow lake
sediments, indicating that these environments present signs of persistent and long-term
contamination. Despite the absence of seasonal influence, the heterogeneity of PCOs in the
sediment was different between lakes and shallow lakes, indicating the influence of surface
drainage on the concentration of these contaminants in the environments. The presence of already
banned organic contaminants were detected, thus raising concerns. More studies are necessary,
since these lacustrine environments are used for recreational and water supply purposes.
Descrição
Programa de Pós-Graduação em Ecologia de Biomas Tropicais. Departamento de Biodiversidade, Evolução e Meio Ambiente, Instituto de Ciências Exatas e Biológicas, Universidade Federal de Ouro Preto.
Palavras-chave
Organochlorine, Sediment, Environments
Citação
KABIR, Ibraheem. Organochlorine pesticides in the sediment of lacustrine environments (Lower Rio Doce Basin, ES, Brazil). 2023. 32 f. Dissertação (Mestrado em Ecologia de Biomas Tropicais) - Instituto de Ciências Exatas e Biológicas, Universidade Federal de Ouro Preto, Ouro Preto, 2023.