Removal of veterinary antibiotics in constructed wetland microcosms Response of bacterial communities

• Type: Article in International Scientific Journal
• Date: 2019

Authors

Santos, F (Author) Other; Marisa M R Almeida (Author) FCUP; Ribeiro, I (Author) Other; Ferreira, AC (Author) Other; Mucha, AP (Author) Other

Journal

Title: Ecotoxicology and Environmental Safety

Vol. 169

Pages: 894-901

ISSN: 0147-6513

Publisher: Elsevier

Indexing

ISI Web of Knowledge - 48 Citations

Scopus - 52 Citations

Other information

Authenticus ID: P-00P-Y3M

DOI: 10.1016/j.ecoenv.2018.11.078

Abstract (EN): This study aimed to evaluate the response of bacteria, in terms of microbial community structure, from constructed wetland (CW) microcosms exposed to two veterinary antibiotics, enrofloxacin (ENR) and ceftiofur (CEF), alone or in a mixture, identifying which bacterial groups were dominant in CWs substrate during livestock wastewater treatment. Wastewater, not-doped or doped with ENR and/or CEF (100 mu g/L each), was treated during 18 one-week cycles. Systems showed removal percentages > 85% for the added antibiotics, showing also high removal percentages for nutrients and organic matter and confirming CWs systems were working properly. However, both time of exposure and presence of antibiotics influenced significantly CWs substrate bacterial community structure. Pyrosequencing results showed bacterial communities were dominated by phyla Proteobacteria (38-48%), Firmicutes (20-27%), Bacteroidetes (12-15%) and Actinobacteria (4-9%), and that their relative abundance was clearly affected by the presence of the antibiotics. Results suggest the applicability of CWs for the removal of veterinary antibiotics from livestock wastewaters and provide new knowledge about the bacteria within the system, which can potentially be involved in removal processes. This information could in the future be used to improve CWs removal rates of pharmaceuticals from livestock wastewaters.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 8