Two-step extraction method for lead isotope fractionation to reveal anthropogenic lead pollution

Kenshi Katahira, Hiroshi Moriwaki, Kazuo Kamura, Hideo Yamazaki

    Research output: Contribution to journalArticle


    This study developed the 2-step extraction method which eluted the Pb adsorbing on the surface of sediments in the first solution by aqua regia and extracted the Pb absorbed inside particles into the second solution by mixed acid of nitric acid, hydrofluoric acid and hydrogen peroxide solution. We applied the method to sediments in the enclosed water area and found out that the isotope ratios of Pb in the second solution represented those of natural origin. This advantage of the method makes it possible to distinguish the Pb between natural origin and anthropogenic source on the basis of the isotope ratios. The results showed that the method was useful to discuss the Pb sources and that anthropogenic Pb in the sediment samples analysed was mainly derived from China because of transboundary air pollution.

    Original languageEnglish
    Pages (from-to)1-6
    Number of pages6
    JournalEnvironmental Technology (United Kingdom)
    Publication statusAccepted/In press - 2018 May 30



    • 2-step extraction
    • anthropogenic pollution
    • Kotani Pond
    • lead isotope ratios
    • natural origin

    ASJC Scopus subject areas

    • Environmental Chemistry
    • Water Science and Technology
    • Waste Management and Disposal

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