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Ecotoxicological assessment of contaminated matrices discharged into the ecosystem
Urbanová, Veronika ; Vávrová, Milada (referee) ; Zlámalová Gargošová, Helena (advisor)
This diploma thesis evaluates the influence of contaminated matrices introduced into the ecosystem in terms of ecotoxicity. It is focused mainly on matrix generated by anthropogenic activities, especially waste of various origin - industrial, energetical, biodegradable and more. For experimental purposes sewage sludge as the bulk waste with the ever-increasing production was selected. Sewage sludge was tested at its most common use - application on the agricultural land. This application is limited by legislative through the concentration limits of hazardous elements. For this reason, the potential ecotoxicity of sludge was evaluated. Ecotoxicological evaluation was performed using the contact bioassays. As the test organisms Eisenia foetida, Folsomia candida, Heterocypris incongruens a plant Lactuca sativa were selected. Sludge from wastewater treatment plants Brno - Modřice, Valtice, Mikulov and Lednice was tested. Samples of sewage sludge showed no ecotoxicity, while respecting the application amount established by the regulation. On the contrary, it can be concluded that soils enriched by sewage sludge show positive effect on soil biota.
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Ecotoxicological assessment of contaminated matrices discharged into the ecosystem
Urbanová, Veronika ; Vávrová, Milada (referee) ; Zlámalová Gargošová, Helena (advisor)
This diploma thesis evaluates the influence of contaminated matrices introduced into the ecosystem in terms of ecotoxicity. It is focused mainly on matrix generated by anthropogenic activities, especially waste of various origin - industrial, energetical, biodegradable and more. For experimental purposes sewage sludge as the bulk waste with the ever-increasing production was selected. Sewage sludge was tested at its most common use - application on the agricultural land. This application is limited by legislative through the concentration limits of hazardous elements. For this reason, the potential ecotoxicity of sludge was evaluated. Ecotoxicological evaluation was performed using the contact bioassays. As the test organisms Eisenia foetida, Folsomia candida, Heterocypris incongruens a plant Lactuca sativa were selected. Sludge from wastewater treatment plants Brno - Modřice, Valtice, Mikulov and Lednice was tested. Samples of sewage sludge showed no ecotoxicity, while respecting the application amount established by the regulation. On the contrary, it can be concluded that soils enriched by sewage sludge show positive effect on soil biota.
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