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Subject: search.filters.subject.Membrane stability

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    Item type:Publication,
    Effect of diluent polarity on membrane stability in the separation of trace Pd(II) from wastewater by HFSLM using LIX84-I
    (2015-01-25)
    Wongkaew, Kraiwith
    ;
    Pancharoen, Ura
    ;
    Phatanasri, Suphot
    ;
    Leepipatpiboon, Natchanun
    ;
    Lothongkum, Anchaleeporn W.
    In a liquid membrane, the type of diluents for the selected extractant plays an important role in membrane stability and separation efficiency. High Pd(II) extraction and stripping of 96% and 91%, respectively, were observed by HFSLM under a feed pH 2, 5% (v/v) LIX84-I dissolved in kerosene and a mixture of 0.8M NH<inf>2</inf>CSNH<inf>2</inf> with 1M HCl as a stripping solution. The highest stability was attained at 350min by using hexane as a diluent. Finally, the calculated activation energy (E<inf>a</inf>) of 30 kJ/mol implied that the separation of Pd(II) was controlled by the diffusion and chemical reaction.