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Degradation of polycyclic aromatic hydrocarbons in aqueous solutions by ultrasonic irradiation

Psyllaki Eleftheria, Goula Grammatiki, Kalogerakis Nikos, Mantzavinos Dionysis

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URIhttp://purl.tuc.gr/dl/dias/7BBC95A8-E31D-433D-A1E7-AC7FE39BA7F6-
Identifierhttps://doi.org/10.1016/j.jhazmat.2004.01.004-
Identifierhttp://www.sciencedirect.com/science/article/pii/S0304389404000482-
Languageen-
Extent8 pagesen
TitleDegradation of polycyclic aromatic hydrocarbons in aqueous solutions by ultrasonic irradiationen
CreatorPsyllaki Eleftheriaen
CreatorΨυλλακη Ελευθεριαel
CreatorGoula Grammatikien
CreatorΓουλα Γραμματικηel
CreatorKalogerakis Nikosen
CreatorΚαλογερακης Νικοςel
CreatorMantzavinos Dionysisen
CreatorΜαντζαβινος Διονυσηςel
PublisherElsevieren
Content SummaryThe effect of various operating conditions (initial concentration, liquid phase temperature, applied power, ultrasound frequency) and of the presence of matrix components (1-butanol, NaCl and FeSO4) on the sonochemical degradation of naphthalene, acenaphthylene and phenanthrene inwater has been studied.Ahorn-type sonicatorwas used to deliver the ultrasound energy, while immersion sampling solid-phase microextraction (SPME) coupled with GC–MS was employed to follow concentration–time profiles of the chosen PAHs. At the operating conditions in question (initial concentrations of 150, 300 and 450g/l, temperatures of 20 and 40 ◦C, applied power of 45, 75 and 150Wand ultrasound frequencies of 24 and 80 kHz), all PAHs were susceptible to sonochemical treatment and, in most cases, complete degradation could be achieved in up to 120 min of treatment. Conversion was found to decrease with increasing initial concentration and temperature and decreasing power and frequency as well as in the presence of an excess of dissolved salts. Addition of 1-butanol, a known hydroxyl radical scavenger, substantially suppressed degradation throughout the course of the reaction, thus highlighting the role of oxidation reactions in PAHs degradation. In contrast, addition of Fe2+ ions at a low concentration enhanced degradation through a Fenton-like reaction.en
Type of ItemPeer-Reviewed Journal Publicationen
Type of ItemΔημοσίευση σε Περιοδικό με Κριτέςel
Licensehttp://creativecommons.org/licenses/by/4.0/en
Date of Item2015-09-24-
Date of Publication2004-
SubjectDegradationen
SubjectPAHsen
SubjectSPMEen
SubjectUltrasounden
SubjectWateren
Bibliographic CitationE. Psillakis, G. Goula, N. Kalogerakis and D. Mantzavinos, "Degradation of polycyclic aromatic hydrocarbons in aqueous solutions by ultrasonic irradiation," J. Hazard. Mater., vol. 108, no.1, pp.95–102, Apr. 2004 doi: 10.1016/j.jhazmat.2004.01.004.en

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