Degradation of gemfibrozil and naproxene in a river water ecosystem (Articolo in rivista)

Type
Label
  • Degradation of gemfibrozil and naproxene in a river water ecosystem (Articolo in rivista) (literal)
Anno
  • 2013-01-01T00:00:00+01:00 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#doi
  • 10.1016/j.microc.2012.06.008 (literal)
Alternative label
  • Grenni P., Patrolecco L., Ademollo N., Tolomei A., Barra Caracciolo A. (2013)
    Degradation of gemfibrozil and naproxene in a river water ecosystem
    in Microchemical journal (Print); Elsevier B.V., Amsterdam (Belgio)
    (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori
  • Grenni P., Patrolecco L., Ademollo N., Tolomei A., Barra Caracciolo A. (literal)
Pagina inizio
  • 158 (literal)
Pagina fine
  • 164 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroVolume
  • 107 (literal)
Rivista
Note
  • ISI Web of Science (WOS) (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#affiliazioni
  • Istituto di Ricerca sulle Acque, Roma (literal)
Titolo
  • Degradation of gemfibrozil and naproxene in a river water ecosystem (literal)
Abstract
  • Pharmaceuticals are nowadays generally recognized to be environmental micropollutants owing to their ubiquitous occurrence in water bodies at concentrations ranging from ng to ?g/L. Since they are molecules designed to be biologically active at very low concentrations, their presence is a source of concern for both human and ecosystem health and the ecological effects on receiving ecosystems remain largely unknown. Incomplete removal during biological wastewater treatments is the main source of surface water contamination. Some of the molecules detected are reported to be persistent in surface water while others, although they are not intrinsically persistent (being rapidly degraded), are being continuously introduced into the aquatic ecosystem, so that they can be considered pseudo-persistent compounds. Degradation of a chemical in the aquatic ecosystem depends on a variety of factors, including the compound's properties, environmental factors and above all the presence of a natural microbial community able to degrade it via metabolic and/or co-metabolic pathways. Naproxen, a non-steroidal anti-inflammatory drug and Gemfibrozil, a fibrate drug used as a lipid regulator, have been found in several natural EU and Italian surface waters, including the River Tiber (Rome). In this context, the present work aims to evaluate if the natural bacterial community of the Tiber was able to degrade Naproxen and Gemfibrozil. Moreover the effects of these chemicals on the bacterial community structure in terms of live bacterial abundances and composition were also assessed. For this purpose, different riverwater microcosmswere set up (in the presence/absence of the naturalmicrobial community) and treated with 100 ?g/L of Naproxen or Gemfibrozil in order to evaluate the disappearance time of 50% of the initial concentrations (DT50). The overall results showthat Gemfibrozil (DT50>70 days) wasmore persistent thanNaproxen (DT50=27 days) and that the autochthonousmicrobial community had a key role in their degradation. The fact thatNaproxen was found in river samples analyzed in a greater concentration was therefore due not to its persistence, but to its pseudo-persistence linked to the spread in its use among the population. (literal)
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