Abstract
Numerous studies have shown the presence of pharmaceutically active compounds (PhACs) in different environmental compartments, for example, in surface water or wastewater ranging from nanograms per litre to micrograms per litre. Likewise, some recent studies have pointed to seasonal variability, thus indicating that PhAcs concentrations in the aquatic environment may depend on the time of year. This work intended to find out (1) whether Tagus fluvial and drinking water were polluted with different groups of PhACs and (2) if their concentrations differed between winter and summer seasons. From the 58 substances analysed, 41 were found belonging to the main therapeutic groups. Statistical differences were seen for antibacterials, antidepressants, anxiolytics, antiepileptics, and cardiovascular drugs, with higher concentrations being detected in winter than in summer. These results might indicate that the PhACs analysed in this study undergo lower environmental degradation in winter than in summer. In order to confirm these initial results, a continuous monitoring should be performed especially on those PhACs that either because of an elevated consumption or an intrinsic chemical persistence are poorly degraded during winter months due to low temperatures and solar irradiation. It is especially important to identify which of these specific PhACs are in order to recommend their substitution by equally effective and safe substances but also environmentally friendly.
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Abbreviations
- DSSTP:
-
downstream sewage treatment plant
- DWTP:
-
Drinking water treatment plant
- MR:
-
Madrid region
- PhACs:
-
Pharmaceutically active compounds
- INE:
-
National Statistics Institute (Instituto Nacional de Estadística)
- SIGRE:
-
Integrated System of Management and Collection of Packaging and Medicines (Sistema Integrado de Gestión y Recogida de Envases y Medicamentos)
- RSP:
-
River sampling point
- CE:
-
Centre of Spain
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Acknowledgements
This project was funded by FISCAM (PI 2007/28). The authors would like to thank the Department of Hydrogeology & Analytical Chemistry (Almería University) for performing the drug analyses, and Toledo and Talavera de la Reina Town Halls for watershed data.
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Valcárcel, Y., Alonso, S.G., Rodríguez-Gil, J.L. et al. Seasonal variation of pharmaceutically active compounds in surface (Tagus River) and tap water (Central Spain). Environ Sci Pollut Res 20, 1396–1412 (2013). https://doi.org/10.1007/s11356-012-1099-2
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DOI: https://doi.org/10.1007/s11356-012-1099-2