Journal of the Oceanographical Society of Japan

, Volume 37, Issue 5, pp 259–266 | Cite as

Partitioning of heavy metals into mineral and organic fractions in a sediment core sample from Osaka Bay

  • Yasushi Kitano
  • Masahiro Sakata
  • Eiji Matsumoto
Article

Abstract

Partitioning of copper, zinc, iron and manganese into oxide, sulfide, organic and silicate fractions has been determined with a selective chemical leaching technique on sediment samples from a core collected in Osaka Bay. The samples have been dated by the210Pb method. Most of the copper and zinc in the polluted surface sediment layer are contained in both oxide and sulfide fractions. This suggests that the transformation of oxides and hydroxides to sulfides under anoxic conditions within the sediment is significant for the fixation of copper and zinc discharged through human activities into the sediment. Manganese is apparently enriched in oxide and hydroxide fractions of the surface layer due to the post-depositional migration of manganese within the sediment. The copper, zinc and manganese contents of the 30 % H2O2 soluble fraction (mostly organic fraction) decrease with depth in the sediment core, and correlate significantly with the organic carbon content. The heavy metal (Cu, Zn, Fe and Mn) contents of the silicate fraction, without exchangeable sites, are almost constant with depth.

Keywords

Zinc Heavy Metal Sulfide Manganese Sediment Core 

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Copyright information

© The Oceanographical Society of Japan 1981

Authors and Affiliations

  • Yasushi Kitano
    • 1
  • Masahiro Sakata
    • 1
  • Eiji Matsumoto
    • 2
  1. 1.Water Research InstituteNagoya UniversityNagoyaJapan
  2. 2.Marine Geology DepartmentGeological Survey of JapanIbarakiJapan

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