Journal ArticleDOI
The solubility of ferrous iron in carbonate-bearing waters
Philip C. Singer,Werner Stumm +1 more
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In this article, it was shown that at pH values below 10.5, ferrous carbonate controls the concentration of Fe(II) in solution, and the equilibrium constant for the reaction was established.Abstract:
UNDER natural waters, reducing as in conditions the bottoms in natural waters, as in the bo oms of lakes under conditions of stagnation and in most groundwaters, the stable form of iron is ferrous iron in the + 11 oxidation state. In waters free of dissolved carbon dioxide, the solubility of Fe(II) is controlled by solid ferrous hydroxide, Fe(OH)2, as shown in Fig. 1. (Table 1 gives the pertinent equilibrium data used in constructing the solubility diagram.) In natural groundwaters, alkalinities often exceed 5 X 10~3 eq/1 (4). Fig. 2 indicates that, for a water containing 5 X 10~3 moles/1 of total carbonic species Cr*, the solubility of Fe(II) is markedly influenced by the formation of ferrous carbonate, FeCC>3. It is immediately evident that at pH values below 10.5, ferrous carbonate controls the concentration of Fe(II) in solution. The equilibrium constant for the reactionread more
Citations
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Journal ArticleDOI
The effect of pH on the kinetics of spontaneous Fe(II) oxidation by O2 in aqueous solution--basic principles and a simple heuristic description.
Barak Morgan,Ori Lahav +1 more
TL;DR: The paper presents a heuristic overview of the pH dependent kinetics of aqueous ferrous oxidation by O(2(aq)) which it is believed will be useful to professionals at both research and technical levels.
Journal ArticleDOI
Ferrous and ferric ion generation during iron electrocoagulation.
TL;DR: For EC in the pH 6.5-7.5 range and at low DO conditions, there is a likelihood of soluble Fe2+ species passing through a subsequentfiltration process resulting in secondary contamination and inefficient contaminant removals.
Journal ArticleDOI
Physico-chemical characteristics of corrosion scales in old iron pipes.
TL;DR: The authors' studies were able to identify important differences between corrosion scales found in two different water distribution systems and establish the role of corrosion scales in the mechanism of iron release from corroded pipes.
Book ChapterDOI
Diagenetic Processes Near the Sediment-Water Interface of Long Island Sound. II. Fe and Mn
TL;DR: In this article, the diagenetic processes for Fe and Mn near the sediment-water interface of Long Island Sound (LIS) were analyzed and the results obtained in this study show that pore-water profiles of Fe2+ and Mn2+ from three stations in LIS have general depth-dependent concentration distributions similar to those reported from other sedimentary basins: concentrations rise above seawater values to a maximum below the interface and then decrease again or remain constant deeper in the deposit.
Journal ArticleDOI
Porewater evidence for a dynamic sedimentary iron cycle in salt marshes1
Anne E. Giblin,Robert W. Howarth +1 more
TL;DR: The porewaters of Great Sippewissett Marsh were shown to be supersaturated with respect to pyrite at all depths and appear to be saturated for iron monosulfides below 12 cm at all sites as mentioned in this paper.
References
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Journal ArticleDOI
The Ionization Constant of HCO3- from 0 to 50°
Book ChapterDOI
Heterogeneous Equilibria Involving Oxides, Hydroxides, Carbonates, and Hydroxide Carbonates
Journal ArticleDOI
Determination of Ferrous Iron in the Presence of Ferric Iron With Bathophenanthroline
G. Fred Lee,Werner Stumm +1 more
TL;DR: More uncertainty than that of iron is encountered in the specific determination of ferrous iron as discussed by the authors, although the colorimetric methods applicable to natural waters are relatively satisfactory for the determination of total iron.
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