Pore water profiles and early diagenesis of Mn, Cu, and Pb in sediments from large lakes

Journal Article · Sun Jan 01 04:00:00 EST 1989 · J. Great Lakes Res.; (United States)

DOI:https://doi.org/10.1016/S0380-1330(89)71463-5· OSTI ID:5907182

McKee, J D; Wilson, T P; Long, D T; Owen, R M

Mn, Cu, and Pb were measured in pore waters at a site in the Caribou sub-basin Lake Superior. The pore water profiles show evidence for the post-depositional mobility of the metals, consistent with interpretations made from sediment concentration profiles. The pore water and sediment concentration profiles of Mn appear to be diagenetically linked. Diagenetic modeling results indicate that the measured profiles are not in a steady-state relationship. The cause of the non-steady-state conditions is unclear but may be related to recent changes in sedimentation rates and in Mn/sup 2 +/ oxidation rates. Flux estimates for Cu and Pb show that these metals could be diffusing from the sediment to overlying water. The decomposition or organic matter is suggested as a source for the metals. A significant amount of Cu and Pb brought to the sediment surface during sedimentation appears to be recycled to the pore waters. This suggests that concentration profiles of these metals in the sediment may not be reliable indicators of the timing and amounts of anthropogenic metal input to Lake Superior.

• Research Organization: Michigan State Univ., East Lansing (USA)
• OSTI ID: 5907182
• Journal Information: J. Great Lakes Res.; (United States), Journal Name: J. Great Lakes Res.; (United States) Vol. 15:1; ISSN JGLRD
• Country of Publication: United States
• Language: English

Related Subjects

520200* -- Environment
Aquatic-- Chemicals Monitoring & Transport-- (-1989)
54 ENVIRONMENTAL SCIENCES
CHEMICAL COMPOSITION
CONTAMINATION
COPPER
DIAGENESIS
ECOLOGICAL CONCENTRATION
ELEMENTS
GREAT LAKES
GROUND WATER
HYDROGEN COMPOUNDS
INTERSTITIAL WATER
LAKE SUPERIOR
LAKES
LEAD
MANGANESE
METALS
MONITORING
ORGANIC MATTER
OXYGEN COMPOUNDS
POLLUTION
SEDIMENTS
SURFACE WATERS
TRANSITION ELEMENTS
WATER
WATER POLLUTION