Supervisors info:
Νικόλαος Θωμαΐδης, Καθηγητής, Τμήμα Χημείας, ΕΚΠΑ
Summary:
In this study leachates samples from 8 different Sanitary Landfills from Greece, were analyzed for the presence of emerging contaminants. In total, 25 leachate samples were analyzed, among them, 8were influent samples (prior toprocessing) and the rest 17 were processed either by biological treatment orby a further step of reversed osmosis treatment. The samples were analyzed for the quantitative determination of emerging pollutants and for the evaluation of the efficiency of the applied treatments.
Solid Phase Extraction (SPE) was used forthe sample clean-up and the pre-concentration of the analytes. The samples were analyzed with reversed-phase liquid-chromatography coupled to quadrupole-time-of-flight mass spectrometry (RP)LC-QTOF-MS and the data was acquired through broad-band Collision Induced Dissociation (bbCID) mode, which provided information on parent and fragment ions without pre-selection of analytes, in a single run. A database of approximately 2,100 emerging contaminants was used for the wide-scope target screening and the detection was based on retention time, mass accuracy, isotopic pattern and fragmentation profile criteria.
According to the above procedures, in total 58 compounds were detected in the tested samples including pharmaceuticals, illicit drugs, pesticides, personal care products, artificial sweeteners and industrial chemicals.
Keywords:
Emerging Pollutants, Leachates, Solid Phase Extraction, Liquid Chromatography Tandem with High Resolution Mass Spectrometry, Target screening
