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Technical University of Crete
Technical University of Crete
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| URI: | http://purl.tuc.gr/dl/dias/EAFA24A9-0477-490D-B663-170E4CCC5EC9 | ||
| Year | 2011 | ||
| Type of Item | Peer-Reviewed Journal Publication | ||
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| Bibliographic Citation | I. D. Manariotis , H.K. Karapanagioti , C.V. Chrysikopoulos , "Degradation of pahs by high frequency ultrasound ", wat. resear .,vol. 45, no.8, pp. 2587- 2594,2011.doi :10.1016/j.watres.2011.02.009 https://doi.org/10.1016/j.watres.2011.02.009 | ||
| Appears in Collections |
Polycyclic aromatic hydrocarbons (PAHs) are persistent organic compounds, which havebeen reported in the literature to efficiently degrade at low (e.g. 20 kHz) and moderate (e.g.506 kHz) ultrasound frequencies. The present study focuses on degradation of naphthalene,phenanthrene, and pyrene by ultrasound at three different relatively high frequencies(i.e. 582, 862, and 1142 kHz). The experimental results indicate that for all three frequenciesand power inputs 133 W phenanthrene degrades to concentrations lower than ourexperimental detection limit (<1 mg/L). Phenanthrene degrades significantly faster at582 kHz than at 862 and 1142 kHz. For all three frequencies, the degradation rates per unitmass are similar for naphthalene and phenanthrene and lower for pyrene. Furthermore,naphthalene degradation requires less energy than phenanthrene, which requires lessenergy than pyrene under the same conditions. No hexane-extractable metabolites wereidentified in the solutions.
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