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Sonochemical degradation of triclosan in waterand wastewater

Elefteria Psillakis, Lucia Sanchez-Prado, Ruth Barro, Maria Llompart, Carmen Garcia-Jares, Marta Lores

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Year 2008
Type of Item Peer-Reviewed Journal Publication
Bibliographic Citation L.Sanchez-Prado, R. Barro, C. G. Jares, M. Llompart, M. Lores, C. Petrakis, N.Kalogerakis, D. Mantzavinos, E.Psillakis , "Sonochemical degradation of triclosan in water and wastewater ",Ultras. Sonochemi. , vol . 15 ,no.5 ,pp. 689–694,2008.doi:10.1016/j.ultsonch.2008.01.007
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The sonochemical degradation of 5 lg l1 triclosan, a priority micro-pollutant, in various environmental samples (seawater, urbanrunoff and influent domestic wastewater) as well as in model solutions (pure and saline water) was investigated. Experiments were conductedwith a horn-type sonicator operating at 80 kHz frequency and a nominal applied power of 135 W, while solid-phase microextractioncoupled with gas chromatography–electron capture detector (SPME/GC–ECD) was employed to monitor triclosan degradation.The latter followed pseudo-first order kinetics with the rate constant being (min1): 0.2284 for seawater > 0.1051 for 3.5% NaCl in deionisedwater > 0.0597 for centrifuged urban runoff 0.0523 for untreated urban runoff > 0.0272 for deionised water > 0.0063 for wastewaterinfluent. SPME/GC–ECD and SPME coupled with gas chromatography–mass spectrometry (SPME/GC–MS) were also used tocheck for the formation of chlorinated and other toxic by-products; at the conditions in question, the presence of such compoundswas not confirmed.

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