The potential of oceanic transport and onshore leaching of additive-derived lead by marine macro-plastic debris

Etsuko Nakashima, Atsuhiko Isobe, Shin'ichiro Kako, Takaaki Itai, Shin Takahashi, Xinyu Guo

    Research output: Contribution to journalArticlepeer-review

    16 Citations (Scopus)

    Abstract

    The long-distance transport potential of toxic lead (Pb) by plastic marine debris was examined by pure water leaching experiments using plastic fishery floats containing high level of additive-Pb such as 5100 ± 74.3 mg kg-1. The leaching of Pb ended after sequential 480-h leaching experiments, and the total leaching amount is equivalent to approximately 0.1% of total Pb in a float. But it recovered when the float was scratched using sandpaper. We propose that a "low-Pb layer," in which Pb concentration is negligibly small, be generated on the float surface by the initial leaching process. Thickness of the layer is estimated at 2.5 ± 1.2 μm, much shallower than flaws on floats scratched by sandpaper and floats littering beaches. The result suggests that the low-Pb layer is broken by physical abrasion when floats are washed ashore, and that Pb inside the floats can thereafter leach into beaches.

    Original languageEnglish
    Pages (from-to)333-339
    Number of pages7
    JournalMarine Pollution Bulletin
    Volume107
    Issue number1
    DOIs
    Publication statusPublished - Jun 15 2016

    All Science Journal Classification (ASJC) codes

    • Oceanography
    • Aquatic Science
    • Pollution

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