ATRAZINE UNDER DENITRIFYING CONDITIONS

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216305%3A26110%2F22%3APU147407" target="_blank" >RIV/00216305:26110/22:PU147407 - isvavai.cz</a>

Výsledek na webu

<a href="http://scopus.com/record/display.uri?eid=2-s2.0-85159695407&origin=inward&tcGid=dce5f3d2f7ba26d38a390914cc439568" target="_blank" >http://scopus.com/record/display.uri?eid=2-s2.0-85159695407&origin=inward&tcGid=dce5f3d2f7ba26d38a390914cc439568</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.5593/sgem2022V/3.2/s12.03" target="_blank" >10.5593/sgem2022V/3.2/s12.03</a>

Jazyk výsledku

angličtina

Název v původním jazyce

ATRAZINE UNDER DENITRIFYING CONDITIONS

Popis výsledku v původním jazyce

The use of pesticides has negative effects on the quality of groundwater. The triazine pesticide atrazine has not been applied to soil in agriculturally used areas of the Czech Republic for many years, yet atrazine and its metabolites are detected in groundwater throughout the country. The effect of these substances on the denitrification process that takes place in groundwater is unclear. This study aims to examine the behavior of atrazine under denitrifying conditions and the pesticide’s effect on the denitrification process. 7-day and 28-day laboratory tests at a concentration of 100 μg/L atrazine were performed to simulate such conditions. A single dose of atrazine was introduced to the samples at the beginning of the tests. No inhibition of the denitrification process was detected in any of the tests. Stimulation of denitrification was measured in the last week of the 28-day test. Adsorption on poplar shavings was the dominant process of the decrease in atrazine concentration during both the 7- and 28-day tests. The biotic loss was 3.9% for the 7-day test. In the 28-day test, there was a total biotic loss of 12.1%. A similar biotic loss of 9.8% was measured also in a 7-day test performed at higher pH. At the end of the 28-day test, the transformation product atrazine-2-hydroxy was detected in the supernatant in very low concentrations. A significant effect of the HgCl2 inhibitor on the instantaneous adsorption rate was observed for all tests.

Název v anglickém jazyce

ATRAZINE UNDER DENITRIFYING CONDITIONS

Popis výsledku anglicky

The use of pesticides has negative effects on the quality of groundwater. The triazine pesticide atrazine has not been applied to soil in agriculturally used areas of the Czech Republic for many years, yet atrazine and its metabolites are detected in groundwater throughout the country. The effect of these substances on the denitrification process that takes place in groundwater is unclear. This study aims to examine the behavior of atrazine under denitrifying conditions and the pesticide’s effect on the denitrification process. 7-day and 28-day laboratory tests at a concentration of 100 μg/L atrazine were performed to simulate such conditions. A single dose of atrazine was introduced to the samples at the beginning of the tests. No inhibition of the denitrification process was detected in any of the tests. Stimulation of denitrification was measured in the last week of the 28-day test. Adsorption on poplar shavings was the dominant process of the decrease in atrazine concentration during both the 7- and 28-day tests. The biotic loss was 3.9% for the 7-day test. In the 28-day test, there was a total biotic loss of 12.1%. A similar biotic loss of 9.8% was measured also in a 7-day test performed at higher pH. At the end of the 28-day test, the transformation product atrazine-2-hydroxy was detected in the supernatant in very low concentrations. A significant effect of the HgCl2 inhibitor on the instantaneous adsorption rate was observed for all tests.

Druh

D - Stať ve sborníku

CEP obor

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OECD FORD obor

10503 - Water resources

Projekt

—

Návaznosti

S - Specificky vyzkum na vysokych skolach

Rok uplatnění

2022

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název statě ve sborníku

International Multidisciplinary Scientific GeoConference Surveying Geology and Mining Ecology Management, SGEM

ISBN

978-619-7603-54-5

ISSN

1314-2704

e-ISSN

—

Počet stran výsledku

8

Strana od-do

21-28

Název nakladatele

STEF92 Technology

Místo vydání

neuveden

Místo konání akce

Vídeň

Datum konání akce

6. 12. 2022

Typ akce podle státní příslušnosti

WRD - Celosvětová akce

Kód UT WoS článku

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