Variability of atmospheric pesticide concentrations between urban and rural areas during intensive pesticide application

• Published in: Atmospheric environment 2007-06, Vol.41 (17), p.3604-3618
• Main Authors: Scheyer, Anne, Morville, Stéphane, Mirabel, Philippe, Millet, Maurice
• Format: Article
• Language: English
• Subjects: Applied sciences; Atmosphere; Atmospheric pollution; Dispersed sources and other; Earth Sciences; Exact sciences and technology; Geochemistry; Ocean, Atmosphere; Pesticide applications periods; Pesticides; Pollutants physicochemistry study: properties, effects, reactions, transport and distribution; Pollution; Pollution sources. Measurement results; Sciences of the Universe; Spatial and temporal variations of concentrations; Zea mays
• ISSN: 1352-2310; 0004-6981; 1873-2844
• DOI: 10.1016/j.atmosenv.2006.12.042

Intensive pesticide use leads to the contamination of water, soil and atmosphere. Atmospheric transport is responsible for pesticide dispersal over long distances. In this study, we evaluate the local dispersal of pesticides from agricultural to urban areas. For this purpose, three high-volume samplers, each equipped with a glass fiber filter and XAD-2 resin for the sampling of particulate and gas phase have been placed in a south-west transect (predominant wind direction) characteristic of rural and urban areas. The urban site (Strasbourg centre) is situated in the middle of two rural sites. Samples were taken simultaneously at three sites during pesticide treatments in autumn and spring 2002–2003. Sampling took place for 24 h at a flow rate of 10–15 m 3 h −1. The pesticides studied were those commonly used in the Alsace region for all crops (maize, cereal, vines …). Many of the pesticides analysed in atmospheric samples were not detected or observed very episodically at very low concentrations. For metolachlor, alachlor, trifluralin, atrazine and diflufenican, higher concentrations were observed, essentially during the application of these compounds. Moreover, some “spraying peaks” were observed for alachlor in the south rural site (near crops) at a level of 31 ng m −3 on 16–17 May 2003. These results show site and time dependence of atmospheric contamination by pesticides. A limited dispersal was also observed especially in the urban area during the application periods of pesticides.