Temporal evolution of organochlorine and organophosphate pesticide residues in wells in the Akkar Region (Lebanon) - INSTITUT DE CHIMIE DES MILIEUX ET MATERIAUX DE POITIERS Accéder directement au contenu
Article Dans Une Revue Environmental Monitoring and Assessment Année : 2023

Temporal evolution of organochlorine and organophosphate pesticide residues in wells in the Akkar Region (Lebanon)

Résumé

The Akkar plain is the second largest agricultural area in Lebanon. This region produces huge amount of regular crops such as maize, fruits and vegetables. In order to protect the crops, farmers use large quantities of many pesticides (including authorised and prohibited molecules) without respecting the recommended doses. In this work, we wanted to study the evolution of OCPs and OPPs residues at three-year intervals in water wells in the Akkar region. 20 OCPs and 8 OPPs were monitored in eight wells in different villages in the plain and mountains of Akkar. Solid phase extraction (SPE) method was used for pesticide extraction, followed by gas chromatography-mass spectrometry (GC-MS) analysis. The results revealed an increasing concentration of OCPs and OPPs in groundwater over the last three years (between 2017 and 2019-2020). This increase in contamination is due to the uncontrolled and still unregulated (by the authorities) use of pesticides, and also to the introduction of new crops. The concentrations found in groundwater confirm that some banned pesticides are still widely used. The calculation of the theoretical pesticide intake suggests that pesticide concentrations in Akkar represent a greater health risk for the population consuming well water during the rainy season.
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Dates et versions

hal-04032855 , version 1 (16-03-2023)

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Roukaya Al Haj Ishak Al Ali, Leslie Mondamert, Jalal Halwani, Joelle Jandry, Nadine Nassif, et al.. Temporal evolution of organochlorine and organophosphate pesticide residues in wells in the Akkar Region (Lebanon). Environmental Monitoring and Assessment, 2023, 195 (1), pp.121. ⟨10.1007/s10661-022-10671-y⟩. ⟨hal-04032855⟩
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