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Sorption Behavior of Selected Pesticides in Alluvial Aquifers
Živančev, Nevena
Dimkić, Milan
Radišić, Marina
Laušević, Mila
Perović, Marija
Kovačević, Srđan
There are approximately 1000 registered products for plant protection with over 300 different active ingredients in Serbia. Due to their extensive use in agriculture, they may be detected in all environmental mediums. Therefore, they’re monitored in air, water and soil, but also in food and tissues. Concentrations of 15 pesticides in surface and groundwaters in Serbia have been monitored from the year 2009 to 2014, in sampling campaigns conducted by the Jaroslav Cerni Institute for the Development of Water Resources. The results showed that the selected pesticides were detected in almost 34% of surface water samples, and in 33% of groundwater samples. All of the detected pesticides had very low concentrations in both surface and groundwater samples (lower than 0.1 pg/L), with a few exceptions. The most frequently detected pesticides were carbendazim and atrazine. These two pesticides have been selected for further analyses of sorption behavior in the sediment, with one additional pesticide for these experiments: carbofuran. In this paper, sorption coefficients for Danube sediment samples collected in Kovin-Dubovac area were analyzed. Sorption coefficient in these samples was highest for carbofuran, and lowest for atrazine. Lack of information on organic matter content and pH of the sediment used in sorption experiments lead to the further research of sorption behavior dependence on various factors of the three selected pesticides in literature data. Regression analysis with a large number of literature data was carried out, with regression equations as results. These results were compared to the ones gained in sorption experiments.
engleski
2016
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pesticides, sorption coefficient, multiple regression analysis