Change search
ReferencesLink to record
Permanent link

Direct link
Fate of pharmaceuticals in rivers: Deriving a benchmark dataset at favorable attenuation conditions
Stockholm University, Faculty of Science, Department of Applied Environmental Science (ITM).
2012 (English)In: Water Research, ISSN 0043-1354, E-ISSN 1879-2448, Vol. 46, no 17, 5551-5565 p.Article in journal (Refereed) Published
Abstract [en]

Pharmaceutical residues are commonly detected organic micropollutants in the aquatic environment. Their actual fate in rivers is still incompletely understood as their elimination is highly substance specific and studies often report contradictory results. To elucidate the ceiling of attenuation rates of pharmaceuticals in rivers we carried out a study at a river with favorable conditions for the elimination of organic micropollutants. Experiments were carried out at a small stream in Germany. Composite samples were taken at both ends of a 12.5 km long river stretch located downstream of a sewage treatment plant and analyzed for 10 pharmaceuticals. Moreover, pore water samples were taken and in situ photolysis experiments at several sites within the river stretch were performed to assess the importance of these individual elimination mechanisms. Pharmaceutical concentration in the surface water at the first sampling site ranged from 3.5 ng L−1 for propranolol to 1400 ng L−1 for diclofenac. In comparison to carbamazepine which was used as persistent tracer, all other pharmaceuticals were attenuated along the river stretch. Their elimination was higher in a sunny, dry weather period (period I) compared to a period with elevated discharge after a heavy rainfall (period II). Overall, the measured elimination rates ranged from 25% for sulfamethoxazole (period II) to 70% for propranolol (period I). Photolysis was only a relevant elimination process for diclofenac and potentially also for sotalol; for these compounds phototransformation half-life times of some hours were determined in the unshaded parts of the river. Biotransformation in the sediments was also an important attenuation process since the concentrations of the other pharmaceuticals in the sediments decreased relative to carbamazepine with depth. For the chiral betablocker metoprolol this biotransformation was also confirmed by a decrease in the enantiomer fractionation from 0.49 at site A to 0.43 at site B and to <0.40 in the deeper sediments.

Place, publisher, year, edition, pages
2012. Vol. 46, no 17, 5551-5565 p.
Keyword [en]
Pharmaceuticals, Attenuation, Phototransformation, Biotransformation, Enantiomer fraction
National Category
Environmental Sciences
URN: urn:nbn:se:su:diva-84036DOI: 10.1016/j.watres.2012.07.033OAI: diva2:578155
Available from: 2012-12-17 Created: 2012-12-17 Last updated: 2013-02-06Bibliographically approved

Open Access in DiVA

No full text

Other links

Publisher's full text

Search in DiVA

By author/editor
Radke, Michael
By organisation
Department of Applied Environmental Science (ITM)
In the same journal
Water Research
Environmental Sciences

Search outside of DiVA

GoogleGoogle Scholar
The number of downloads is the sum of all downloads of full texts. It may include eg previous versions that are now no longer available

Altmetric score

Total: 17 hits
ReferencesLink to record
Permanent link

Direct link