title: Sonochemical degradation of triclosan in water and wastewater.
abstract: The sonochemical degradation of 5 microg l(-1) triclosan, a priority micro-pollutant, in various environmental samples (seawater, urban runoff and influent domestic wastewater) as well as in model solutions (pure and saline water) was investigated. Experiments were conducted with a horn-type sonicator operating at 80 kHz frequency and a nominal applied power of 135 W, while solid-phase microextraction coupled 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 (min(-1)): 0.2284 for seawater>0.1051 for 3.5% NaCl in deionised water>0.0597 for centrifuged urban runoff approximately 0.0523 for untreated urban runoff >0.0272 for deionised water >0.0063 for wastewater influent. SPME/GC-ECD and SPME coupled with gas chromatography-mass spectrometry (SPME/GC-MS) were also used to check for the formation of chlorinated and other toxic by-products; at the conditions in question, the presence of such compounds was not confirmed.
authors.affiliation: Department of Analytical Chemistry, Nutrition and Bromatology, University of Santiago de Compostela, E-15782 Santiago de Compostela, Spain.
authors.forename: Lucia
authors.initials: L
authors.lastname: Sanchez-Prado
authors.forename: Ruth
authors.initials: R
authors.lastname: Barro
authors.forename: Carmen
authors.initials: C
authors.lastname: Garcia-Jares
authors.forename: Maria
authors.initials: M
authors.lastname: Llompart
authors.forename: Marta
authors.initials: M
authors.lastname: Lores
authors.forename: Christos
authors.initials: C
authors.lastname: Petrakis
authors.forename: Nicolas
authors.initials: N
authors.lastname: Kalogerakis
authors.forename: Dionissios
authors.initials: D
authors.lastname: Mantzavinos
authors.forename: Elefteria
authors.initials: E
authors.lastname: Psillakis