Publications by authors named "Rachid Benabdallah"
The use of pesticides in agriculture to protect crops against pests and diseases generates environmental contamination. The atmospheric compartment contributes to their dispersion at different distances from the application areas and to the exposure of organisms in untreated areas through dry and wet deposition. A multiresidue analytical method using the same TD-GC-MS analytical pipeline to quantify pesticide concentrations in both the atmosphere and rainwater was developed and tested in natura.
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- Agricultural activities are significant contributors to air pollution, but understanding their exact emissions is still uncertain.
- A study conducted in France measured emissions from a sheep pen and dairy stable, identifying over 400 volatile organic compounds (VOCs), with carbon dioxide and ammonia being the most prevalent.
- The findings indicate that the dairy stable released more VOCs than the sheep pen, and even with high emissions, they had little impact on fine particle levels inside the buildings due to quick air turnover.
A multiresidue method has been developed to analyze atrazine (ATZ), diuron (DIU), and their major degradation products, desethylatrazine (DEA), desisopropylatrazine (DIA), and dichlorophenylmethylurea in sewage sludge. Liquid chromatography coupled to electrospray tandem mass spectrometry (LC-ESI-MS-MS) allowed, in the multiple-reaction monitoring mode, the simultaneous analysis of these pesticides in only one run after their extraction with ethyl acetate-dichloromethane 90:10 (v/v) and a cleanup on a Florisil column. Stable isotopically labeled ATZ and DIU were used as internal standards to overcome matrix effects during the pesticide quantification.
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