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    Removal of diclofenac potassium from wastewater using clay-micelle complex

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    Date
    2012-06
    Author
    Karaman, Rafik
    Khamis, Mustafa
    Qurie, Mohannad
    Halabieh, Rawan
    Makharzeh, Iman
    Manassra, Adnan
    Abbadi, Jehad
    Qtait, Alaa
    Bufo, Sabino A.
    Nasser, Ahmed
    Nir, Shlomo
    Advisor(s)
    Unknown advisor
    Type
    Article
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    Abstract
    The presence of an ionized carboxyl group in the widely used non-steroidal anti-inflammatory (NSAID) drug diclofenacpotassium results in a high mobility of diclofenac and in its low sorption under conditions of slow sand filtration or subsoilpassage. No diclofenac degradation was detected in pure water or sludge during one month. Tertiary treatments of wastewaterindicated that the effective removal of diclofenac was by reverse osmosis, but the removal by activated carbon was lesssatisfactory. This study presents an efficient method for the removal of diclofenac from water by micelle-clay compositesthat are positively charged, have a large surface area and include large hydrophobic domains. Adsorption of diclofenacin dispersion by charcoal and a composite micelle (otadecyltrimethylammonium [ODTMA] and clay [montmorillonite])was investigated. Analysis by the Langmuir isotherm revealed that charcoal had a somewhat larger number of adsorptionsites than the composite, but the latter had a significantly larger binding affinity for diclofenac. Filtration experiments on asolution containing 300 ppm diclofenac demonstrated poor removal by activated carbon, in contrast to very efficient removalby micelle-clay filters. In the latter case the weight of removed diclofenac exceeded half that of ODTMA in the filter.Filtration of diclofenac solutions at concentrations of 8 and 80 ppb yielded almost complete removal at flow rates of 30 and60 mL min-1. One kilogram of ODTMA in the micelle-clay filter has been estimated to remove more than 99% of diclofenacfrom a solution of 100 ppb during passage of more than 100 m3.
    DSpace URI
    http://hdl.handle.net/11073/8243
    External URI
    https://www.researchgate.net/publication/230614438_Removal_of_Diclofenac_Potassium_from_Wastewater_Using_Clay-Micelle_Complex
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