Toxicity tests on Daphnia magna

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F62156489%3A43210%2F21%3A43921816" target="_blank" >RIV/62156489:43210/21:43921816 - isvavai.cz</a>

Výsledek na webu

<a href="https://mendelnet.cz/media/mnet_2021_full.pdf" target="_blank" >https://mendelnet.cz/media/mnet_2021_full.pdf</a>

DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

Toxicity tests on Daphnia magna

Popis výsledku v původním jazyce

The aim of this study was to determine the toxic effect of chemicals on the tested organism Daphnia magna. The following substances were selected for testing: polyaluminium chloride (PAX 18), its aqueous solution (PAX 19) and potassium dichromate (K2Cr2O7) as a reference substance. The experimental concentrations for PAX 18 were in the intervals 1-100 mg/l, for PAX 19 10-300 mg/l and for K2Cr2O7 40-150 mg/l. Testing was performed in three replicates with ten specimens. Each test took 48 hours without changing the medium. The test organisms were not fed, and a tap water was used as a medium. The 24hEC50 values were as follows: 45.06 mg/l for PAX 18, 97.82 mg/l for PAX 19 and 1,57 mg/l for potassium dichromate. The 48hEC50 values were as follows: 22.62 mg/l for PAX 18, 37.20 mg/l for PAX 19 and 0.864 mg/l for K2Cr2O7. Changes in pH, dissolved oxygen content and number of inhibited individuals were regularly monitored. The pH values for PAX 18 were between 4.56-8.40, for PAX 19 within the range of 5.63-8.40 and for K2Cr2O7 did not drop below 7. Low pH values for PAX 18 and PAX 19 can be explained by very low pH value of the test substances, therefore the results can be considered as valid. The oxygen content was sufficient for all three test substances. The concentrations of chemical substances used in toxicity tests were more toxic for daphnids than the concentrations introduced into the aquatic environment.

Název v anglickém jazyce

Toxicity tests on Daphnia magna

Popis výsledku anglicky

The aim of this study was to determine the toxic effect of chemicals on the tested organism Daphnia magna. The following substances were selected for testing: polyaluminium chloride (PAX 18), its aqueous solution (PAX 19) and potassium dichromate (K2Cr2O7) as a reference substance. The experimental concentrations for PAX 18 were in the intervals 1-100 mg/l, for PAX 19 10-300 mg/l and for K2Cr2O7 40-150 mg/l. Testing was performed in three replicates with ten specimens. Each test took 48 hours without changing the medium. The test organisms were not fed, and a tap water was used as a medium. The 24hEC50 values were as follows: 45.06 mg/l for PAX 18, 97.82 mg/l for PAX 19 and 1,57 mg/l for potassium dichromate. The 48hEC50 values were as follows: 22.62 mg/l for PAX 18, 37.20 mg/l for PAX 19 and 0.864 mg/l for K2Cr2O7. Changes in pH, dissolved oxygen content and number of inhibited individuals were regularly monitored. The pH values for PAX 18 were between 4.56-8.40, for PAX 19 within the range of 5.63-8.40 and for K2Cr2O7 did not drop below 7. Low pH values for PAX 18 and PAX 19 can be explained by very low pH value of the test substances, therefore the results can be considered as valid. The oxygen content was sufficient for all three test substances. The concentrations of chemical substances used in toxicity tests were more toxic for daphnids than the concentrations introduced into the aquatic environment.

Druh

D - Stať ve sborníku

CEP obor

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OECD FORD obor

10617 - Marine biology, freshwater biology, limnology

Projekt

<a href="/cs/project/EF16_019%2F0000869" target="_blank" >EF16_019/0000869: Udržitelná produkce zdravých ryb v různých akvakulturních systémech - PROFISH</a><br>

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2021

Kód důvěrnosti údajů

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

Název statě ve sborníku

MendelNet 2021: Proceedings of International PhD Students Conference

ISBN

978-80-7509-821-4

ISSN

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e-ISSN

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Počet stran výsledku

5

Strana od-do

203-207

Název nakladatele

Mendelova univerzita v Brně

Místo vydání

Brno

Místo konání akce

Brno

Datum konání akce

10. 11. 2021

Typ akce podle státní příslušnosti

EUR - Evropská akce

Kód UT WoS článku

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