Resumé
Effects of the common antibacterial agent triclosan on microbial
communities and degradation of domestic xenobiotics were studied in
simulated sewage-drain-field soil. Cultivable microbial populations
decreased 22-fold in the presence of 4 mg kg−1 of triclosan, and triclosan-resistant Pseudomonas
strains were strongly enriched. Exposure to triclosan also changed the
general metabolic profile (Ecoplate substrate profiling) and the general
profile (T-RFLP) of the microbial community. Triclosan degradation was
slow at all concentrations tested (0.33–81 mg kg−1) during 50-days of incubation. Mineralization experiments (14C-tracers)
and chemical analyses (LC–MS/MS) showed that the persistence of a
linear alkylbenzene sulfonate (LAS) and a common analgesic (ibuprofen)
increased with increasing triclosan concentrations (0.16–100 mg kg−1). The largest effect was seen for LAS mineralization which was severely reduced by 0.16 mg kg−1
of triclosan. Our findings indicate that environmentally realistic
concentrations of triclosan may affect the efficiency of biodegradation
in percolation systems.
Originalsprog | Engelsk |
---|---|
Sider (fra-til) | 1599-1605 |
Antal sider | 7 |
Tidsskrift | Environmental Pollution |
Vol/bind | 159 |
Udgave nummer | 6 |
DOI | |
Status | Udgivet - jun. 2011 |
Programområde
- Programområde 2: Vandressourcer