PAH and PCB removal efficiencies in Umeå (Sweden) and Šiauliai (Lithuania) municipal wastewater treatment plants
2006 (English)In: Water, Air and Soil Pollution, ISSN 0049-6979, Vol. 175, no 1-4, 291-303 p.Article in journal (Refereed) Published
Dissolved concentrations of polycyclic aromatic hydrocarbons (PAHs) and polychlorinated biphenyls (PCBs) in the influents and effluents of two municipal sewage treatment plants (STPs) were monitored over 16- (Umeå, Sweden) and 22- (Šiauliai, Lithuania) day sampling periods. Sampling was performed using a passive sampling technique (semipermeable membrane devices; SPMDs) for sequestration of the dissolved (readily bioavailable) fraction of persistent organic pollutants (POPs). Removal efficiencies for individual low molecular weight (LMW) PAH compounds varied from 84% to levels at which the compounds were not detected in effluents from Umeå. The corresponding efficiencies of the Šiauliai plant were 33–95%. Measurements revealed that dissolved concentrations of most of the PCBs and some of the high molecular weight (HMW) PAHs increased during the conventional wastewater treatment at both plants. The release of dissolved PAHs and PCBs in the effluents from municipal wastewater treatment plants might increase the environmental contamination by readily bioavailable pollutants in the recipient waters; the rivers Umeälven and Kulpè. SPMDs were found to be suitable sampling tools for long-term (weeks-month) integrative monitoring of trace concentrations of the dissolved fraction of hydrophobic pollutants in the wastewater process, since the sampling and clean-up steps were easy to perform.
Place, publisher, year, edition, pages
Netherlands: Springer , 2006. Vol. 175, no 1-4, 291-303 p.
Analysis, Bioavailable fraction, Diffusive sampling, Effluent, PAHs, PCBs, SPMDs, Wastewater treatment efficiency
IdentifiersURN: urn:nbn:se:umu:diva-3616OAI: oai:DiVA.org:umu-3616DiVA: diva2:142400