Ekotoxicita bioodpadů.

Abstract

The aim of this dissertation thesis is measuring the concentration of group of selected organic pollutants such as alkylphenols, synthetic musks, brominated flame retardants and the biocide triclosan in sewage sludge and their effects on earthworms. These pollutants are often present in sludges, which are used as a fertilizer in agriculture and therefore pose a risk – namely for soil ecosystem. In first part of the thesis, the kinetics (uptake and elimination) of these selected chemicals in earthworms after short (1-week) and long-term (60 days) exposition is described. In the second part, the transfer of nonylphenol to plants and earthworms is quantified during 4-months exposure experiment. The measured concentrations of selected pollutants in earthworms, plants and sludge show their different behavior during the exposure and elimination. Results of these ecotoxicological tests are important in particular for the synthetic musks and triclosan, which tend to bioaccumulate in the worms and can be therefore further transferred in the food chain. Results on uptake and excretion of these compounds in earthworms haven’t been described yet, so these data are first of its kind to be published. The work was carried out at the institute Bioforsk, department of Soil and environment (nowadays NIBIO).