IntroductionDuring the last decades some active synthesized substancesused in human or veterinary medicine have been discharged intothe environment without considering the possible negative conse-quences from that action. Generally, their range of concentration inthe environment can be very variable. Additionally, most of theseorganic compounds, defined as emerging contaminants, have notbeen studied much and there is not yet an established environ-mental quality criterion [1–3]