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dc.contributor.authorKern, Susanne-
dc.contributor.authorBaumgartner, Rebekka-
dc.contributor.authorHelbling, Damian E.-
dc.contributor.authorHollender, Juliane-
dc.contributor.authorSinger, Heinz-
dc.contributor.authorLoos, Martin J.-
dc.contributor.authorSchwarzenbach, René P.-
dc.contributor.authorFenner, Kathrin-
dc.date.accessioned2022-01-27T15:00:57Z-
dc.date.available2022-01-27T15:00:57Z-
dc.date.issued2010-11-
dc.identifier.issn1464-0325de_CH
dc.identifier.issn1464-0333de_CH
dc.identifier.urihttps://digitalcollection.zhaw.ch/handle/11475/24003-
dc.description.abstractUpon partial degradation of polar organic micropollutants during activated sludge treatment, transformation products (TPs) may be formed that enter the aquatic environment in the treated effluent. However, TPs are rarely considered in prospective environmental risk assessments of wastewater-relevant compound classes such as pharmaceuticals and biocides. Here, we suggest and evaluate a tiered procedure, which includes a fast initial screening step based on high resolution tandem mass spectrometry (HR-MS/MS) and a subsequent confirmatory quantitative analysis, that should facilitate consideration of TPs formed during activated sludge treatment in the exposure assessment of micropollutants. At the first tier, potential biotransformation product structures of seven pharmaceuticals (atenolol, bezafibrate, ketoprofen, metoprolol, ranitidine, valsartan, and venlafaxine) and one biocide (carbendazim) were assembled using computer-based biotransformation pathway prediction and known human metabolites. These target structures were screened for in sludge-seeded batch reactors using HR-MS/MS. The 12 TPs found to form in the batch experiments were then searched for in the effluents of two full-scale, municipal wastewater treatment plants (WWTPs) to confirm the environmental representativeness of this first tier. At the second tier, experiments with the same sludge-seeded batch reactors were carried out to acquire kinetic data for major TPs that were then used as input parameters into a cascaded steady-state completely-stirred tank reactor (CSTR) model for predicting TP effluent concentrations. Predicted effluent concentrations of four parent compounds and their three major TPs were corroborated by comparison to 3-day average influent and secondary effluent mass flows from one municipal WWTP. CSTR model-predicted secondary effluent mass flows agreed within a factor of two with measured mass flows and confidence intervals of predicted and measured mass flows overlapped in all cases. The observed agreement suggests that the combination of batch-determined transformation kinetics with a simple WWTP model may be suitable for estimating aquatic exposure to TPs formed during activated sludge treatment. Overall, we recommend the tiered procedure as a realistic and cost-effective approach to include consideration of TPs of wastewater-relevant compounds into exposure assessment in the context of prospective chemical risk assessment.de_CH
dc.language.isoende_CH
dc.publisherRoyal Society of Chemistryde_CH
dc.relation.ispartofJournal of Environmental Monitoringde_CH
dc.rightsLicence according to publishing contractde_CH
dc.subjectDisinfectantde_CH
dc.subjectEnvironmental monitoringde_CH
dc.subjectPharmaceutical preparationde_CH
dc.subjectSewagede_CH
dc.subjectTandem mass spectrometryde_CH
dc.subjectBiotransformationde_CH
dc.subject.ddc363: Umwelt- und Sicherheitsproblemede_CH
dc.subject.ddc660: Technische Chemiede_CH
dc.titleA tiered procedure for assessing the formation of biotransformation products of pharmaceuticals and biocides during activated sludge treatmentde_CH
dc.typeBeitrag in wissenschaftlicher Zeitschriftde_CH
dcterms.typeTextde_CH
zhaw.departementLife Sciences und Facility Managementde_CH
zhaw.organisationalunitInstitut für Chemie und Biotechnologie (ICBT)de_CH
dc.identifier.doi10.1039/c0em00238kde_CH
dc.identifier.pmid20967365de_CH
zhaw.funding.euNode_CH
zhaw.issue11de_CH
zhaw.originated.zhawNode_CH
zhaw.pages.end2111de_CH
zhaw.pages.start2100de_CH
zhaw.publication.statuspublishedVersionde_CH
zhaw.volume12de_CH
zhaw.publication.reviewPeer review (Publikation)de_CH
zhaw.author.additionalNode_CH
zhaw.display.portraitYesde_CH
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Kern, S., Baumgartner, R., Helbling, D. E., Hollender, J., Singer, H., Loos, M. J., Schwarzenbach, R. P., & Fenner, K. (2010). A tiered procedure for assessing the formation of biotransformation products of pharmaceuticals and biocides during activated sludge treatment. Journal of Environmental Monitoring, 12(11), 2100–2111. https://doi.org/10.1039/c0em00238k
Kern, S. et al. (2010) ‘A tiered procedure for assessing the formation of biotransformation products of pharmaceuticals and biocides during activated sludge treatment’, Journal of Environmental Monitoring, 12(11), pp. 2100–2111. Available at: https://doi.org/10.1039/c0em00238k.
S. Kern et al., “A tiered procedure for assessing the formation of biotransformation products of pharmaceuticals and biocides during activated sludge treatment,” Journal of Environmental Monitoring, vol. 12, no. 11, pp. 2100–2111, Nov. 2010, doi: 10.1039/c0em00238k.
KERN, Susanne, Rebekka BAUMGARTNER, Damian E. HELBLING, Juliane HOLLENDER, Heinz SINGER, Martin J. LOOS, René P. SCHWARZENBACH und Kathrin FENNER, 2010. A tiered procedure for assessing the formation of biotransformation products of pharmaceuticals and biocides during activated sludge treatment. Journal of Environmental Monitoring. November 2010. Bd. 12, Nr. 11, S. 2100–2111. DOI 10.1039/c0em00238k
Kern, Susanne, Rebekka Baumgartner, Damian E. Helbling, Juliane Hollender, Heinz Singer, Martin J. Loos, René P. Schwarzenbach, and Kathrin Fenner. 2010. “A Tiered Procedure for Assessing the Formation of Biotransformation Products of Pharmaceuticals and Biocides during Activated Sludge Treatment.” Journal of Environmental Monitoring 12 (11): 2100–2111. https://doi.org/10.1039/c0em00238k.
Kern, Susanne, et al. “A Tiered Procedure for Assessing the Formation of Biotransformation Products of Pharmaceuticals and Biocides during Activated Sludge Treatment.” Journal of Environmental Monitoring, vol. 12, no. 11, Nov. 2010, pp. 2100–11, https://doi.org/10.1039/c0em00238k.


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