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    Extraction and destruction of organics in wastewater using ozone-loaded solvent

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    Publication date
    2004
    Author
    Tizaoui, Chedly
    Slater, M.J.
    Ward, D.B.
    Keyword
    Ozone
    Wastewater treatment
    Solvent extraction
    Volasil 245
    Polydimethylsiloxane
    Ozone-loaded solvent
    Chlorinated organics
    Nitroaromatics
    Peer-Reviewed
    Yes
    
    Metadata
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    Abstract
    Originally developed as a heat exchange fluid, Volasil 245 (decamethylcyclopentasiloxane) has been found to dissolve 10 times more ozone than water does. This article proposes and investigates the extraction of wastewater contaminants to ozone-loaded Volasil 245 as a means of providing rapid treatment. In a series of bench-scale tests, the effectiveness of ozone-loaded Volasil 245 contact was compared with that of conventional gas contact. Tests were conducted with respect to a range of organic compounds: namely, phenol, 2-chlorophenol, 2,3-dichlorophenol, 1,3-dichlorobenzene, o-nitrotoluene, and nitrobenzene. Contact with the ozone-loaded solvent was suggested to be the more rapid technique, reducing aqueous concentrations by at least 85% within 30 s. In the case of 2-chlorophenol, Volasil 245 contact was shown to require just ~0.5 min to achieve a residual aqueous fraction of 5%, as opposed to ~4.5 min of gas contact. However, water/solvent interfacial mass transfer resistance was suggested to limit the degree of aqueous decontamination ultimately achieved.
    URI
    http://hdl.handle.net/10454/3172
    Version
    No full-text available in the repository
    Citation
    Ward, D.B., Tizaoui, C. and Slater, M.J. (2004). Extraction and destruction of organics in wastewater using ozone-loaded solvent. Ozone Science and Engineering. Vol. 26, No. 5, pp. 475-486.
    Link to publisher’s version
    10.1080/01919510490507801
    Type
    Article
    Collections
    Engineering and Informatics Publications

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