A large number of studies using soils prepared

(2007a) have pointed out that there is a need for further accumulation studies which use real contaminated soils with a variety of properties. In that way, synergistic effects of various contaminants present in the FTI 277 HCl would be better understood and more useful data for risk assessment would be collected. Therefore, to follow the recommendations and cognitions of current scientific trends, we have aimed to perform a study of toxicity of real semi-solid depot sludge obtained from a wastewater treatment plant (WWTP) which purifies municipal, hospital and sugar factory wastewaters.