Results Metal and metalloid concentrations in soil and

For earthworm exposure, mixtures containing 30% and 70% of depot sludge were prepared and concentrations of the above listed metals/metalloids were approximately 1.5–2 times higher in the phosphorylation 30% mixture and 2.5–3 times higher in the 70% mixture compared to soil. Contrary, concentrations of few metals were lower in the 30% and 70% mixtures than in soil: Cu (~ 10%), Cd, K and Zn (10% and 30%, respectively), whereas the most pronounced decrease was observed for Mo (20% and 60%, respectively).