Computer Science
Scientific paper
Dec 1977
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1977gecoa..41.1751b&link_type=abstract
Geochimica et Cosmochimica Acta, vol. 41, Issue 12, pp.1751-1758
Computer Science
5
Scientific paper
A complete analysis of a sulfide rich water from a sedimentary area has been achieved. The formation of metastable sulfur species (polysulfide ions, colloidal sulfur and thiosulfate) is very important. The relative concentrations of the sulfur species is controlled by bacterial processes ( Desulfovibrio and Thiobacteriaceae ). Electrochemical measurements and results of the analyses are in agreement. A possible repartition of polysulfide ions is S 2- 6 - S 2- 5 > S 2- 4 . This repartition, although out of equilibrium, is characteristic of the processes leading to the formation of the metastable sulfur species. The water is in equilibrium with amorphous FeS formation. When sulfide, polysulfide and thiosulfate complexing of trace metals Cu, Cd and Pb is taken into account, an agreement is reached between their concentrations in water and their concentrations in the FeS precipitate.
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