This work presents the fate of carbamazepine (CBZ) and five of its metabolites in Barcelona's groundwater at a field scale under different redox conditions in connection with (1) the physicho-chemical properties of the target compounds, (2) the occurrence of common contaminants in urban groundwater of Barcelona and (3) the groundwater redox conditions. To this end, groundwater samples were collected in two distinct zones of Barcelona city: (1) Poble Sec and (2) Bes�s River Delta in May 2010. Overall, the highest concentrations and the largest number of detected target compounds were found in Bes�s River Delta, which is basically recharged by a river that receives large amounts of effluents from waste water treatments plants (WWTPs). Conversely, Poble Sec presented not only lower concentrations but also a smaller number of compounds. 27 Groundwater samples were collected during May 2010 and were analyzed by Liquid Chromatrography-tandem Mass Spectrometry (LC/MS-MS).The results of this study show that CBZ was more susceptible to be removed under the oxidizing conditions of Poble Sec aquifers than the reducing conditions of Bes�s River Delta. In the latter, the metabolites 2-hydroxycarbamazepine (2OH CBZ) and 3-hydroxycarbamazepine (3OH CBZ) and acridone (ACRON) were found to be highly persistent whilst 10,11-epoxy carbamazepine (CBZ-EP) did not. In Poble Sec, CBZ metabolites did not contribute to groundwater contamination because they were poorly detected. [Acknowledgements: This work was financially supported by SCARCE Consolide-Ingenio 2010 project (refCSD2009-00065) funded by the Ministry of Economy and Competitiviness of Spain.]

Occurrence and fate of carbamezapine and five metabolites in an urban aquifer under different redox conditions

246th National Meeting (2013)

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