The occurrence of Diclofenac in the particulate phase of wastewaters

A. E. B. Kermia, D. Djebbar-Fouial

Abstract


Abstract:Diclofenac is one of the most consumed drugs in the world and in Algeria. It is classified in the therapeutic group of non-steroidal anti-inflammatory drugs (NSAIDs). The presence of pharmaceuticals in the environment is known in the recent decades as "emerging contaminants", the most part of these substances can enter in the aquatic systems from the excretion of these molecules after human consumption or veterinary use. Our work focuses on the presence of these molecules in the wastewater’s particulate phase of two wastewaters treatment plants (WWTPs) in Algiers. The particulate phase was isolated by filtration of wastewater on glass fibre filters (GFF) with diameter pores of 1.6 and 0.7 µm, and then the filters were extracted using an ultrasound bath followed by a centrifugation step. The filtrate was diluted in Ultra-pure water and extracted with solid phase extraction (SPE) cartridges. The samples were analysed by gas chromatography coupled with mass spectrometry (GC-MS) after a derivatization step with N-methyl-N-(trimethylsilyl) trifluoroacetamide (MSTFA) to reduce the polarity of our molecule and increase its volatility, which make the analysis more suitable.

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