Geochemical investigations of iron and manganese in coastal sediments of the southern Baltic Sea
Stodian, I.; Black, H.J.; Gerbersdorf, S.; Köster, M.; Meyer-Reil, L.-A.; Rieling, T. (2000). Geochemical investigations of iron and manganese in coastal sediments of the southern Baltic Sea, in: Flemming, B.W. et al. (Ed.) Muddy coast dynamics and resource management. Proceedings in Marine Science, 2: pp. 149-160
In: Flemming, B.W.; Delafontaine, M.T.; Liebezeit, G. (Ed.) (2000). Muddy coast dynamics and resource management. Proceedings in Marine Science, 2. Elsevier: Amsterdam. ISBN 0-444-50464-8. 294 pp., more
In: Proceedings in Marine Science. Elsevier: New York. ISSN 1568-2692; e-ISSN 2352-2860, more
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| Authors | | Top |
- Stodian, I.
- Black, H.J.
- Gerbersdorf, S.
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- Köster, M.
- Meyer-Reil, L.-A.
- Rieling, T.
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| Abstract |
Seasonal fluxes of iron and manganese were investigated in sediments from the Rassower Strom (Nordrügensche Bodden, Baltic Sea, Germany). For both iron and manganese, the effective fluxes measured in incubation experiments were up to 46 times lower than the diffusive fluxes calculated from pore-water profiles, this being due to the reoxidation of Fe²+ and Mn²+. The effective manganese fluxes were approximately one order of magnitude higher than the effective iron fluxes. Highest fluxes of manganese were observed in autumn 1996, whereas fluxes in winter and spring in 1997 were up to 18 times lower. Calculated turnover times for pore-water nganese also varied seasonally. The shortest turnover times were calculated for sumrner 1996 (<2 hours). If the flux of dissolved manganese is not balanced by reoxidation of Mn²+, the manganese oxide pool is depleted in a short time (120 hours). Total solid iron content at the sediment surface was 50 times higher than the total manganese content. The same ratio was found between the reducible phases of iron and manganese. |
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