Heavy metal distribution in sediments from Calabar River, southeastern Nigeria

Abstract

The concentration and areal distribution of selected metals (Pb, Zn, Cu, Cd, Ni, Fe, and Cr) in the sediments of the Calabar River were studied to determine the extent of anthropogenic input and to estimate the effects of dumping industrial waste materials into the river. The concentrations of Pb, Zn, and Cu indicate relatively moderate pollution mainly on the left-hand side of the river while Ni, Cr, Co, Cd, and Fe levels are below values found to have adverse effects on the lives of marine biota. High metal contents are found close to industrial establishments and so enhanced metal concentrations are related to industrial sewage and metal leaching from garbage and solid waste dumps.

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Correspondence to E. E. U. Ntekim.

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Ntekim, E.E.U., Ekwere, S.J. & Ukpong, E.E. Heavy metal distribution in sediments from Calabar River, southeastern Nigeria. Geo 21, 237–241 (1993). https://doi.org/10.1007/BF00775913

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Key words

  • Anthropogenic
  • Lithogenic
  • Contamination
  • Pollution
  • Toxic