Manganese solid phase profiles

Fig. 15.18 Concentration profiles of iron and manganese solid phases in sediments derived from three marine examples. Data represented hy symbols were taken from Canfield et al. (1993 a,h), whereas the curves demonstrate the respective simulations carried out with the model STEADYSEDl hy Wang and Van Cappellen (1996).

Fig. 8.17 Biogeochemical profiles of sulfur, manganese and iron species in a coastal marine sediment (Aarhus Bay, Denmark, 16 m water depth). A) Oxygen and nitrate profiles measured with and NO microsensors. B) Pore water profiles of dissolved manganese, iron and H S. C) Profiles of solid phase oxidized manganese and iron and of pyrite. D) Distribution of sulfate reduction rates (SRR) measured hy S-technique. The broken line at 4 cm depth indicates the transition between the suboxic zone and the sulfidic zone. Data in A) were measured at the same site but a different year than data in B)-D). (Data from Kjaer 2000 and Thamdrup et al. 1994a reproduced from Jorgensen and Nelson 2004).

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