Change search
ReferencesLink to record
Permanent link

Direct link
Biodegradation of acidic pharmaceuticals in bed sediments: insight from a laboratory experiment
Univ Bayreuth, Dept Hydrol, D-95440 Bayreuth, Germany.
Univ Bayreuth, Dept Hydrol, D-95440 Bayreuth, Germany .
2008 (English)In: Environmental Science and Technology, ISSN 0013-936X, E-ISSN 1520-5851, Vol. 42, 7273-7279 p.Article in journal (Refereed) Published
Abstract [en]

Pharmaceutical residues are commonly detected micropollutants in the aquatic environment. Biodegradation in sediments is a potentially significant removal process for these compounds in rivers which is constrained by the transfer of water and solutes into the sediment The aim of this study was to determine the combined effect of flow velocity and sediment dynamics and thus of water-sediment interactions on the attenuation of 6 acidic pharmaceuticals. We carried out experiments with river water and sediment in a bench-scale annular flume at two different hydraulic boundary conditions (flat sediment surface vs moving sediment). The effective biodegradation half-lives of 4 compounds (diclofenac, bezafibrate, ibuprofen, naproxen) were in the range of 2.5 to 18.6 days and were much shorter when the exchange of surface and pore water was fast. For gemfibrozil, a half-life of 10.5 d was determined in the experiment with moving sediment whereas no degradation was observed with flat sediment bed. These findings can be attributed to the limited transfer of water and solutes into the sediment at low flow velocity and flat sediment bed which rapidly induced anaerobic conditions in the sediment The only compound that was efficiently removed in deeper, anoxic sediment layers was naproxen. The calculated half-life distances in rivers ranged from 53 to 278 km. Our results indicate that it could be favorable to increase the rate of exchange between surface and pore water during river restoration to enhance the attenuation of organic micropollutants like acidic pharmaceuticals

Place, publisher, year, edition, pages
2008. Vol. 42, 7273-7279 p.
Keyword [en]
Environmental science
National Category
Environmental Sciences
URN: urn:nbn:se:su:diva-18998DOI: 10.1021/es801562jISI: 000259603700041OAI: diva2:185521
Available from: 2013-01-29 Created: 2009-02-19 Last updated: 2013-01-30Bibliographically approved

Open Access in DiVA

Fulltext(1351 kB)478 downloads
File information
File name FULLTEXT02.pdfFile size 1351 kBChecksum SHA-512
Type fulltextMimetype application/pdf

Other links

Publisher's full text

Search in DiVA

By author/editor
Radke, Michael
In the same journal
Environmental Science and Technology
Environmental Sciences

Search outside of DiVA

GoogleGoogle Scholar
Total: 478 downloads
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: 28 hits
ReferencesLink to record
Permanent link

Direct link