Crystalline geological bedrock headwater stream contamination in an agricultural-extensive rural watershed: keys factors for the behaviour of neutral and ionic pesticides using a passive sampling approach.

ABSTRACT: The Aixette Watershed, located in southwestern France, was semi-continuously monitored (every 14 days) over 3 years at four different sampling spots with Polar Organic Chemical Integrative Samplers (POCIS), using the Oasis® HLB configuration (for 64 neutral pesticides/metabolites) and the Oasis® MAX configuration (for 15 ionic pesticides/metabolites). This watershed is characterised by extensive agricultural practices (bovine and ovine production) with breeding areas and cereal growing for cattle feeding. The downstream of the Aixette River is located in a peri-urban area. The neutral pesticide contamination could be qualified as background contamination noise, whereas ionic pesticide contamination revealed contamination peaks. The detection frequencies for neutral compounds were higher th

SUBMITTER: Guibal R 

PROVIDER: S-EPMC12488814 | biostudies-literature | 2025 Aug

REPOSITORIES: biostudies-literature