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Unformatted text preview: Forms: S elemental sulfur S 2-sulfide SO 4 2-sulfate Organic-S (C x H y O z N q P f S) Reactions: (all reactions are microbially-mediated) Sulfur oxidation - occurs in hot springs, acid mine drainage S SO 4 2 CEE 320 Discussion 8 22-Mar-10 2 Sulfate reduction - occurs under anoxic conditions (e.g. sewers, bottom of lakes) SO 4 2 S 2 + 2H + H 2 S (g) Sulfide oxidation - often occurs where sulfur oxidation is also occuring S 2 S SO 4 2 Organic-S synthesis and decomposition Productivity Oligotrophic: low productivity. Mesotrophic: medium productivity; between eutrophic and oligotrophic. Eutrophic: high productivity, does not have to be anthropogenic....
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- Spring '10