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Table 3 Reactions and stability constants from JCHESS [51] used for speciation calculations.

From: Seasonal variations in pore water and sediment geochemistry of littoral lake sediments (Asylum Lake, MI, USA)

Reaction

Stability Constant

Fe+2(aq) + HS-(aq) + 0.25H+(aq) + SO4-2(aq) = FeS2(s) + 1H2O pyrite

log K = 24.7

Fe+2(aq) + HS-(aq) = FeS + H+(aq) pyrrhotite

log K = 3.72

Fe+2(aq) + HCO3-(aq) = FeCO3(s) + H+(aq) siderite

log K = 0.19

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Geochemical Transactions

ISSN: 1467-4866

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