Pesticides and long-term denitrification conditions

článek ve sborníku mimo WoS a Scopus

angličtina

Groundwater is an important source of drinking water in many countries. Over the last decade, pesticides have been found at higher concentrations in these waters. This is potentiallydangerous for people and nature. For the future, it is very important to understand the behaviour of pesticides under denitrifying conditons, which are typical for groundwaters. The aim of this study was to investigate the behaviour of atrazine, terbuthylazine and tebuconazole under denitrifying conditions during 28 days. These conditions were simulated in a semi-continuous long-term laboratory test with a single dose of the test substance at the beginnig of the test. After 28 days, none of the tested pesticides showed an inhibitory effect on denitrification; on the contrary, they had a stimulating effect of up to 10% (terbuthylazine). Biotic loss was only measured in the test with atrazine (9.8%). The dominant mechanism of the loss of all tested pesticides was adsorption (terbuthylazine 68.4%, tebuconazole 82.7%, and atrazine 30.6%). The lowest residual amount of pesticide in water was measured with tebuconazole (17.3%), followed by terbuthylazine (31.6%) and atrazine (59.6%).

groundwater, biodegradation, adsorption, triazine pesticides

PÁNIKOVÁ, K.; MALÁ, J.; BÍLKOVÁ, Z.

10. 11. 2021

Mendel University in Brno

Brno

978-80-7509-821-4

MendelNet 2021 Proceedings of 28th International PhD Students Conference

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463

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