| Text | 192941 2012 10.3303/CET1228007 Pharmaceutical degradation aquatic ecosystems Degradation of emerging pollutants in aquatic ecosystems Barra Caracciolo A., Patrolecco L., Di Lenola M., Battaglia A., Grenni P. Barra Caracciolo A, Irsa Cnr, Via Salaria km 29,300, 00015 monterotondo Scalo RM Patrolecco L., Irsa Cnr, Via Salaria km 29,300, 00015 monterotondo Scalo RM Di Lenola M., Irsa Cnr, Via Salaria km 29,300, 00015 monterotondo Scalo RM Battaglia A., Irsa Cnr, Via Salaria km 29,300, 00015 monterotondo Scalo RM Grenni P., Irsa Cnr, Via Salaria km 29,300, 00015 monterotondo Scalo RM The present work aims to define the natural attenuation potential of a river ecosystem versus Naproxen and Gemfibrozil pharmaceutical contaminants, evaluating the role of the autochthonous bacterial community in their degradation. The biotic degradation DT50 of Naproxen and Gemfibrozil were evaluated in microbiologically active versus sterilized river water, using laboratory microcosms. Moreover, the degradations of Naproxen was also evaluated in microcosms simultaneously treated with both pharmaceuticals in order to evaluate if their co presence could affect their environmental fate and the degradation activity of the microbial community. Each pharmaceutical was added at a concentration of 100 g/L. Chemical analyses were performed using a HPLC Fluorescence method recently validated in order to follow the decrease of the pharmaceuticals in microcosms. The number of live bacteria N. live bacteria/mL both in pharmaceutical treated and un treated river water was also evaluated using epifluorescence microscopy. The overall results show that no decrease in pharmaceutical concentrations was observed in the sterile water, while the bacterial community had a key role in their degradation Naproxen was in fact completely degraded after about 30 days both when alone and in co presence of Gemfibrozil. Gemfibrozil was partially degraded and 64 % of its initial concentration is still present at day 105. 28 Published version Book series 007_BarraCaracciolo_CET4.pdf Articolo in rivista AIDIC 1974 9791 Chemical Engineering transactions Chemical Engineering transactions Chem.l Eng. trans. Chemical Engineering transactions. C.E.T. luisa.patrolecco PATROLECCO LUISA anna.barracaracciolo BARRA CARACCIOLO ANNA paola.grenni GRENNI PAOLA TA.P04.005.011 Vulnerabilita degli ecosistemi delle acque sotterranee e attenuazione naturale degli inquinanti nel suolo e nel sottosuolo |
