Publication details

Pesticides in the atmosphere: a comparison of gas-particle partitioning and particle size distribution of legacy and current-use pesticides

Authors

DEGRENDELE Celine OKONSKI Krzysztof MELYMUK Lisa Emily LANDLOVÁ Linda KUKUČKA Petr AUDY Ondřej KOHOUTEK Jiří ČUPR Pavel KLÁNOVÁ Jana

Year of publication 2016
Type Article in Periodical
Magazine / Source Atmospheric Chemistry and Physics
MU Faculty or unit

Faculty of Science

Citation
Web http://www.atmos-chem-phys.net/16/1531/2016/
Doi http://dx.doi.org/10.5194/acp-16-1531-2016
Field Atmosphere sciences, meteorology
Keywords SEMIVOLATILE ORGANIC-COMPOUNDS; AIR-SOIL EXCHANGE; LONG-RANGE TRANSPORT; ORGANOCHLORINE PESTICIDES; SPATIAL-DISTRIBUTION; PARTICULATE MATTER; MASS-SPECTROMETRY; RURAL ATMOSPHERE; GLOBAL-SCALE; AMBIENT AIR
Description This study presents a comparison of seasonal variation, gas-particle partitioning, and particle-phase size distribution of organochlorine pesticides (OCPs) and current-use pesticides (CUPs) in air. Two years (2012/2013) of weekly air samples were collected at a background site in the Czech Republic using a high-volume air sampler. To study the particle-phase size distribution, air samples were also collected at an urban and rural site in the area of Brno, Czech Republic, using a cascade impactor separating atmospheric particulates according to six size fractions. Major differences were found in the atmospheric distribution of OCPs and CUPs. The atmospheric concentrations of CUPs were driven by agricultural activities while secondary sources such as volatilization from surfaces governed the atmospheric concentrations of OCPs. Moreover, clear differences were observed in gas-particle partitioning; CUP partitioning was influenced by adsorption onto mineral surfaces while OCPs were mainly partitioning to aerosols through absorption. A predictive method for estimating the gas-particle partitioning has been derived and is proposed for polar and non-polar pesticides. Finally, while OCPs and the majority of CUPs were largely found on fine particles, four CUPs (carbendazim, isoproturon, prochloraz, and terbuthylazine) had higher concentrations on coarse particles (> 3.0 mu m), which may be related to the pesticide application technique. This finding is particularly important and should be further investigated given that large particles result in lower risks from inhalation (re-gardless the toxicity of the pesticide) and lower potential for long-range atmospheric transport.
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