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Ferrous iron‐sulfide interactions in anoxic hypolimnetic waters
Author(s) -
Davison W.,
Heaney S. I.
Publication year - 1978
Publication title -
limnology and oceanography
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.7
H-Index - 197
eISSN - 1939-5590
pISSN - 0024-3590
DOI - 10.4319/lo.1978.23.6.1194
Subject(s) - ferrous , sulfide , carbonate , anoxic waters , chemistry , iron sulfide , environmental chemistry , precipitation , hypolimnion , sulfate , inorganic chemistry , sulfur , nutrient , physics , organic chemistry , meteorology , eutrophication
Seasonal polarographic measurements of sulfide and ferrous iron concentrations in the hypolimnion of a thermally stratified lake show that the inorganic chemistry in the waters nearest the sediment is dominated by ferrous sulfide precipitation. There is no evidence for supersaturation or organic interactions. The solubility product for ferrous sulfide at 10°C and near zero ionic strength was 0.9–2.0·10 −17 M 2 , which agrees with an independent laboratory determination for fine‐grained freshly precipitated FeS. Although the solution concentrations of iron II and carbonate suggest that ferrous carbonate precipitation may just be possible, analysis of the particulate matter gave no evidence for this.