Fate and biodegradability potential of an emerging micropollutant diclofenac in subsurface environment
| Autor: | Elif Pehlivanoglu-Mantas, E. Aydın, Emel Topuz, Sevgi Sari, Didem Okutman Tas |
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| Rok vydání: | 2017 |
| Předmět: |
Environmental Engineering
Nonsteroidal Chemistry 0208 environmental biotechnology 02 engineering and technology 010501 environmental sciences Biodegradation 01 natural sciences 020801 environmental engineering stomatognathic diseases chemistry.chemical_compound Diclofenac Environmental chemistry Carbon source medicine Environmental Chemistry Ecotoxicology Degradation (geology) Sewage treatment General Agricultural and Biological Sciences Effluent 0105 earth and related environmental sciences medicine.drug |
| Zdroj: | International Journal of Environmental Science and Technology. 15:1201-1210 |
| ISSN: | 1735-2630 1735-1472 |
| Popis: | The present study deals with the assessment of the fate of an emerging contaminant (diclofenac), present in the subsurface environment at specific concentration levels, and its biodegradation potential under different environmental configurations. Diclofenac is a widely consumed nonsteroidal anti-inflammatory drug used as a painkiller prescribed as pills or ointments and among the most frequently detected pharmaceuticals in wastewater treatment plants' effluents. Fermentative/methanogenic cultures were enriched from previously contaminated sediment samples. Although partial biodegradation was achieved in all enrichment cultures, complete degradation was not observed. The results reflected that less than 6% of the diclofenac sorbed on the solid phase and the rest was either biotransformed (25-40%) or remained in the liquid phase (55-70%) at the end of 45-day incubation period. Although partial cometabolic degradation of diclofenac occurred in the presence of glucose, biodegradation was not observed in the presence of readily biodegradable carbon source (i.e., acetate). Diclofenac concentration up to 1000 mu g/L did not affect the methanogenic activity of the enriched culture. The results of this study will have a significant impact in the designation of the permitted concentration limits of diclofenac before the discharge through wastewater treatment plants. |
| Databáze: | OpenAIRE |
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