Journal of Oceanography

, Volume 34, Issue 3, pp 108–115 | Cite as

Accumulation rate and heavy metal pollution in Osaka Bay sediments

  • Eiji Matsumoto
  • Setsuya Yokota
Article

Abstract

The accumulation rates of sediment cores in Osaka Bay have been determined by using210Pb dating technique. In the upper 10 cm210Pbex contents show a constant value with depth. The accumulation rates below the homogeneous layer of sediments ranging from 0.12 to 0.61cm y−1 (0.067−0.34 g cm−2 y−1) were obtained. The higher contents of Zn, Cu, Pb and Cr were observed in the upper 10 to 30 cm of sediments. Assuming that the increment of heavy metal content in sediments is due to anthropogenic origin, the amount of anthropogenic input of heavy metals into sediments were estimated to be 1,300–2,700μg cm−2 for Zn, 150 – 480 for Cu, 360 – 410 for Pb and 320 – 480 for Cr. The increment appears to start about 100 years ago. In surfical sediments most of heavy metal contents exceeded the background content, and then most part of Osaka Bay is polluted by heavy metals.

Keywords

Heavy Metal Sediment Core Accumulation Rate Heavy Metal Pollution Heavy Metal Content 

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Copyright information

© Oceanographical Society of Japan 1978

Authors and Affiliations

  • Eiji Matsumoto
    • 1
  • Setsuya Yokota
    • 1
  1. 1.Geological Survey of JapanKawasakiJapan

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