Long-term monitoring of dioxins in fish and sediments from the Elbe River basin

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00020699%3A_____%2F25%3AN0000228" target="_blank" >RIV/00020699:_____/25:N0000228 - isvavai.cz</a>

Výsledek na webu

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DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

Long-term monitoring of dioxins in fish and sediments from the Elbe River basin

Popis výsledku v původním jazyce

Dioxins are persistent organic pollutants characterized by their high toxicity, hydrophobicity and ability to accumulate in biotic and abiotic environmental compartments, as well as in food chains. These compounds can be generated unintentionally during incomplete combustion processes in the presence of chlorine. After formation they tend to bind to small particles, which enables their long-range atmospheric transport. Once reached the aquatic ecosystem dioxins accumulate in lipid tissues of organisms and in sediments where they sorb to organic carbon. This study summarizes dioxin monitoring data in sediment and fish samples collected from the Elbe River and its major tributaries across the Czech Republic over the period 2015 to 2024. Results indicate different distribution patterns between matrices. In all fish samples the consistently predominant congener was PCB 126, while concentrations of individual compounds in sediments were more site-specific. Another difference is also in spatial trend, which was observed in fish, where dioxin levels increase along the downstream course of the Elbe River, whereas in sediments there is no clear dependence. Dioxin concentrations in sediments reached their long-term maximum at the Bílina River, with levels approximately an order of magnitude higher than those at other sites. In contrast, fish samples showed smaller concentration variability.

Název v anglickém jazyce

Long-term monitoring of dioxins in fish and sediments from the Elbe River basin

Popis výsledku anglicky

Dioxins are persistent organic pollutants characterized by their high toxicity, hydrophobicity and ability to accumulate in biotic and abiotic environmental compartments, as well as in food chains. These compounds can be generated unintentionally during incomplete combustion processes in the presence of chlorine. After formation they tend to bind to small particles, which enables their long-range atmospheric transport. Once reached the aquatic ecosystem dioxins accumulate in lipid tissues of organisms and in sediments where they sorb to organic carbon. This study summarizes dioxin monitoring data in sediment and fish samples collected from the Elbe River and its major tributaries across the Czech Republic over the period 2015 to 2024. Results indicate different distribution patterns between matrices. In all fish samples the consistently predominant congener was PCB 126, while concentrations of individual compounds in sediments were more site-specific. Another difference is also in spatial trend, which was observed in fish, where dioxin levels increase along the downstream course of the Elbe River, whereas in sediments there is no clear dependence. Dioxin concentrations in sediments reached their long-term maximum at the Bílina River, with levels approximately an order of magnitude higher than those at other sites. In contrast, fish samples showed smaller concentration variability.

Druh

D - Stať ve sborníku

CEP obor

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OECD FORD obor

10511 - Environmental sciences (social aspects to be 5.7)

Projekt

<a href="/cs/project/SS02030027" target="_blank" >SS02030027: Vodní systémy a vodní hospodářství v ČR v podmínkách změny klimatu</a><br>

Návaznosti

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

Rok uplatnění

2025

Kód důvěrnosti údajů

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

Název statě ve sborníku

Magdeburský seminář o ochraně vod 2025 - Hospodaření s vodou v povodí Labe včera, dnes a zítra

ISBN

978-3-910400-04-7

ISSN

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e-ISSN

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Počet stran výsledku

2

Strana od-do

136-137

Název nakladatele

Mezinárodní komise pro ochranu Labe (MKOL)

Místo vydání

Magdeburg

Místo konání akce

Magdeburg

Datum konání akce

8. 10. 2025

Typ akce podle státní příslušnosti

EUR - Evropská akce

Kód UT WoS článku

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