Läkemedelssubstanser i den akvatiska miljön: En studie av förekomst och reningseffektivitet vid avloppsreningsverket på Ön, Umeå
Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
The purpose of this study was to investigate the occurrence and the removal efficiency of pharmaceuticals at a sewage treatment plant in Umeå. Levels of pharmaceuticals were measured on three consecutive days in influent water, after presedimentation and in effluent water using Online Solid Phase Extraction Liquid Chromatography – tandem mass spectrometry (SPE LC-HESI-MS/MS). The selection of the 95 pharmaceuticals included in the study was primarily based on ecotoxological data, of which 31 were detected in 24 of 27 samples in levels between low ng/l to low µg/l. Paracetamol was detected in highest concentrations, up to 106 µg/l in influent water, but also showed the highest removal efficiency at 99.8 %. Several pharmaceuticals showed negative removal rates, indicating an increase in concentration. None of the analyzed pharmaceuticals were detected in levels exceeding the calculated critical environmental concentration in the recipient Ume River and therefore no pharmacological effects are expected to occur in exposed fish. The sewage treatment plant at Ön has no emission limits for pharmaceuticals in its environmental permit, but the active upstream work carried out at the treatment plant aims to reduce the occurrence of drug residues in sewage. Today, there are no specific limits for pharmaceuticals released from Swedish sewage treatment plants and EU recently decided not to include pharmaceuticals on the list of priority substances in the Water Framework Directive, which probably would have led to more restrictions regarding drug residues in sewage effluent.
Place, publisher, year, edition, pages
2013. , 43 p.
pharmaceuticals, sewage treatment plants, removal efficiency, critical environmental concentration, pharmaceutical legislation
IdentifiersURN: urn:nbn:se:umu:diva-73501OAI: oai:DiVA.org:umu-73501DiVA: diva2:632208
Bachelor of Science in Environmental Health