Photocatalytic decolorization of rhodamine B dye as a model of dissolved organic compounds: Influence of dissolved inorganic chloride salts in seawater of the Sea of Japan

Makoto Makita, Akira Harata

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    35 Citations (Scopus)

    Abstract

    The effects of salinity on the photooxidative decolorization of rhodamine B in a variety of aqueous salt solutions were studied, aiming at the purification of seawater using a photocatalytic reaction. It was demonstrated that the photooxidative decolorization of rhodamine B in chloride salt solutions could proceed. It was found that the reaction was accelerated in the presence of a certain amount of salt and that a 2.0 wt% salt solution showed the fastest decolorization rate. Metal ions, Na+ and Mg2+, caused the enhancement of the photocatalytic activity at the same salt concentration as seawater. The reaction rate of photooxidative dye decolorization in seawater was slower than that in salt water although Na+ and Cl- are the major ions in seawater.

    Original languageEnglish
    Pages (from-to)859-863
    Number of pages5
    JournalChemical Engineering and Processing: Process Intensification
    Volume47
    Issue number5
    DOIs
    Publication statusPublished - May 1 2008

    Fingerprint

    rhodamine B
    Seawater
    Organic compounds
    Chlorides
    Coloring Agents
    Dyes
    Salts
    Saline water
    Reaction rates
    Purification
    Metal ions
    Ions

    All Science Journal Classification (ASJC) codes

    • Chemical Engineering(all)

    Cite this

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    abstract = "The effects of salinity on the photooxidative decolorization of rhodamine B in a variety of aqueous salt solutions were studied, aiming at the purification of seawater using a photocatalytic reaction. It was demonstrated that the photooxidative decolorization of rhodamine B in chloride salt solutions could proceed. It was found that the reaction was accelerated in the presence of a certain amount of salt and that a 2.0 wt{\%} salt solution showed the fastest decolorization rate. Metal ions, Na+ and Mg2+, caused the enhancement of the photocatalytic activity at the same salt concentration as seawater. The reaction rate of photooxidative dye decolorization in seawater was slower than that in salt water although Na+ and Cl- are the major ions in seawater.",
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    AB - The effects of salinity on the photooxidative decolorization of rhodamine B in a variety of aqueous salt solutions were studied, aiming at the purification of seawater using a photocatalytic reaction. It was demonstrated that the photooxidative decolorization of rhodamine B in chloride salt solutions could proceed. It was found that the reaction was accelerated in the presence of a certain amount of salt and that a 2.0 wt% salt solution showed the fastest decolorization rate. Metal ions, Na+ and Mg2+, caused the enhancement of the photocatalytic activity at the same salt concentration as seawater. The reaction rate of photooxidative dye decolorization in seawater was slower than that in salt water although Na+ and Cl- are the major ions in seawater.

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