Polar pesticides in surface and waste water

abstract

English

This study is focused on the determination of polar pesticides in surface and waste waters. In this study Mecoprop-P, MCPA, Dichlorprop-P, 2,4-D and MCPBA in differently loaded surface waters and communal waters from sewage treatment plants were analyzed. These herbicides are included in the group identified as environmental quality standards. Some of herbicides (2,4-D and MCPA) were selected because their consumption in the Czech Republic exceeds 30 tons per year. Samples were collected from three rivers in the Czech Republic near the town of Jaroměř (Elbe, Úpa and Metuje Rivers), from one river flowing through the town of Brno (Svratka River) and from inflow and outflow of two waste water treatment plants (WWTP Jaroměř, WWTP Brno – Modřice). Particular rivers were chosen for monitoring due to the probability of occurrence of herbicides, because they flow through agriculturally cultivated areas. Solid phase extraction (SPE) was used for the isolation of target compounds and their concentration. Gas chromatography with tandem mass spectrometry (GC/MS/MS) was used for the determination of target analytes in surface and waste waters after their derivatization. Selected herbicides were detected in all collected samples. Their levels in surface waters were within the range of 0.1-100 ng/L, in waste water from 0.2 to 50 ng/L. The most contaminated was the water in the river Elbe. In common, the concentration of selected pesticides in outflow from the waste water treatment plants were lower than those in the recipients, in spite of the fact that removal efficiencies for these compounds were not very high (around 50 %, in some cases even worse).

polar pesticides, surface water, waste water, removal efficiency

ČÁSLAVSKÝ, J.; BORŮVKOVÁ, T.

30. 11. 2016

Environmental Research Institute, University of Highlandsand Islands, Thurso, Scotland, UK

Thurso

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