Use of Chemical Indicators and Bioassays in Bottom Sediment Ecological Risk Assessment

Archives of Environmental Contamination and Toxicology
Marek Tarnawski, Agnieszka Baran

Abstract

This study is was designed to assess the ecological risk associated with chemical pollution caused by heavy metals and PAHs on the basis of their ecotoxicological properties in sediments collected from the Rzeszów dam reservoir (Poland). The sediment samples were collected from three sampling stations: S1-inlet, backwater station, S2-middle of reservoir, S3 outlet, near the dam. The sediments' toxicity was evaluated using a battery of bioassays (Phytotoxkit, Phytotestkit, Ostracodtoxkit F, and Microtox). The highest content of metals (120.5 mg Zn; 22.65 mg Pb; 8.20 mg Cd ∙ kg-1 dw) and all PAHs (∑9361 μg ∙ kg-1 dw) in sediments was found at station S1. The lowest content of metals (86.72 mg Zn; 18.07 mg Cu; 17.20 mg Pb; 3.62 mg Cu; 28.78 mg Ni; 30.52 mg Cr ∙ kg-1 dw) and PAHs (∑4390 μg ∙ kg-1 dw) was found in the sediment from station S2. The ecological risk assessment of the six metals and eight PAHs revealed a high potential toxicity in sediments from stations S1 (PECq = 0.69) and S3 (PECq = 0.56) and a low potential toxicity in sediments from station S2 (PECq = 0.38). The studies also showed the actual toxicity of sediments for the test organisms. The sediment pore water was least toxic compared to the whole sediment: solid ...Continue Reading

References

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Citations

May 20, 2020·International Journal of Environmental Research and Public Health·Aleksandra Ziemińska-StolarskaAleksander Szmidt
Dec 13, 2018·Bulletin of Environmental Contamination and Toxicology·Alicja KicińskaBeata Kosa-Burda
Jul 8, 2019·Environmental Geochemistry and Health·Agnieszka BaranMagdalena Szara
Dec 31, 2019·Environmental Science and Pollution Research International·Magdalena UrbaniakKurunthachalam Kannan
Aug 25, 2021·Environmental Monitoring and Assessment·Karina Caballero-GallardoAna Juan-García

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