PARENT SESSION
15 - Atmospheric Transport and Global Pollution
8:00 AM to 6:30 PM, Monday, 13 May 2002
Exhibition Area

(15-23) Analysis of some Organochlorine Pesticides in the Atmosphere of an Urban Area (Strasbourg, East of France).

SCHEYER, Anne¹, MORVILLE, Stéphane¹, MIRABEL, Philippe¹, MILLET, Maurice^*,1, ¹ LPCA/CGS - UMR 7517 CNRS/ULP - 1 rue Blessig -, Strasbourg cedex -, FRANCE -

ABSTRACT- The intensive used of pesticides has led to a chronic contamination of all environmental compartments (water, soil and atmosphere). The atmosphere is known to be a good pathway for this contamination which occurs during and after treatments. When pesticides are in the atmosphere, they can be deposited, transported and degraded via photochemical reactions. Organochlorines (OCs) pesticides were used heavily for pest controls between 1960 and 1980 and due to their environmental persistence have become ubiquitous. Most of them have been banned or severely restricted especially in industrialised countries but residues of OCs are routinely found in air and precipitation. Major sources of these chemicals are emissions from agricultural soils, urban areas and long range transport from countries where they are still in use. From results obtained in Strasbourg and Colmar between 1992 and 1994 (Millet et al., 1997 ; Sanusi et al., 2000), an analytical method for the analysis of 12 organochlorines pesticides (p-p′DDT, p-p′DDD, p-p′DDE, Aldrin, Dieldrin, Endrin, -HCH, :-HCH, cis-chlordane, trans-chlordane, -endosulfan, -endosulfan and heptachlor) using GC-ECD is developed. This method consist of separation on DB-5 capillary column and quantification with electron capture detector by using an internal standard (-HCH). Detection limit is 2 g.L-1 with about 7 % uncertainty. Confirmation was made by injection on GC-MS. Atmospheric samples are sampled, between 24 and 48 h, by using a high volume sampler on glass Fibber filters and PUF-plugs and Soxhlet extracted with a mixture of CH2Cl2/n-hexane. Field campaigns were made on 2001 and in each samples, three OCs pesticides were always found in the particulate and gas phases : -HCH, -HCH and Aldrin at concentrations varied between 25 and 250 pg.m-3 in the particulate phase and between 15 and 500 pg.m-3 for the gas phase. cis-chlordane, trans-chlordane, -endosulfan, -endosulfan, Endrin and p-p′DDD were also found but not systematically at generally lower concentrations. References Millet, M., Wortham, H., Sanusi, A., Mirabel, Ph. (1997) Environ. Sci. and Poll. Res., 4 (3), 172-180. Sanusi, A., Millet, M., Mirabel Ph., Wortham, H. (2000) Sci. Tot. Environ., 263(1-3), 263-277.

Key words: Atmosphere, Organochlorine pesticides, urban area, analysis