Copper and other trace elements strongly bound to humic acids along sediment cores in the Ross Sea, Antarctica

N. Calace, C. Cremisini, M. Galletti, S. Mirante, B.M. Petronio

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Abstract

Marine sediment cores sampled in three different areas, during the 1997/98 Italian Antarctic Expedition, were studied. The cores (40 cm) were immediately subdivided into 13 or 14 layers (2-4 cm) in order to obtain a high-depth resolution in the metal content and humic substance analyses. The results obtained for the amount of metals strongly bound to humic acids showed the following order: Cu ≫ Zn ≫ Co > As ≥ Mn. The fraction of Cu, Zn and As bound to humic acid (μg g-1 of HA) increases in the first 10-12 cm of cores, then a decrease is observed. This observation could be related both to the presence of a mobile fraction of metals in sediments successively bound to humic acids and to different structural features showed by humic acids along the cores, due to transformation processes. For the other metals a variable pattern along the cores was found. © The Royal Society of Chemistry 2005.
Original languageEnglish
Pages (from-to)1281 - 1286
Number of pages6
JournalJournal of Environmental Monitoring
Volume7
Issue number12
DOIs
Publication statusPublished - Dec 2005
Externally publishedYes

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All Science Journal Classification (ASJC) codes

  • Environmental Science(all)
  • Environmental Chemistry

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