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Table 5 Iron(II,III) minerals and the solubility constants used in the model

From: Decoupling of arsenic and iron release from ferrihydrite suspension under reducing conditions: a biogeochemical model

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Log Kso (I = 0 M, 25°C)

Reference

Fe(OH)3(s) + 3 H+ = 3 H2O + Fe3+

5.66

(1)

As-2LFh + 3 H+ = 3 H2O + Fe3+

5.6

From Eq. (4)

Siderite + H+ = Fe2+ + HCO3-

-0.19

(1)

Magnetite + 8 H+ = Fe2+ + 4 H2O + 2 Fe3+

10.47

(1)

Vivianite + 2 H+ = 3 Fe2+ + 8 H2O + 2 HPO42-

-11.07

[62]

  1. (1) Taken from LLNL version 8, release 6 dataset (thermo.com.V8.R6+.dat)
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Geochemical Transactions

ISSN: 1467-4866

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