IMIS | Flanders Marine Institute
 

Flanders Marine Institute

Platform for marine research

IMIS

Publications | Institutes | Persons | Datasets | Projects | Maps
[ report an error in this record ]basket (0): add | show Printer-friendly version

Kinetics of iron (II) oxidation in seawater of various pH
Roekens, E.J.; Van Grieken, R.E. (1983). Kinetics of iron (II) oxidation in seawater of various pH. Mar. Chem. 13: 195-202
In: Marine Chemistry. Elsevier: Amsterdam. ISSN 0304-4203, more
Peer reviewed article  

Also published as
  • Roekens, E.J.; Van Grieken, R.E. (1984). Kinetics of iron (II) oxidation in seawater of various pH, in: IZWO Coll. Rep. 14(1984). IZWO Collected Reprints, 14: pp. chapter 6, more

Available in Authors 
    VLIZ: Open Repository 128962 [ OMA ]

Keywords
    Iron; Kinetics; Oxidation; Marine

Authors  Top 
  • Roekens, E.J., more
  • Van Grieken, R.E., more

Abstract
    The rate of iron(II) oxidation in the North Sea water of pH 5.5-10 in the range 10-25°C has been studied. The oxygenation rate depends linearly on the iron(II) and dissolved oxygen concentrations. The second-order dependence on (OH-), found by several investigators for synthetic solutions, was confirmed in seawater, but only for pOH>6.9. For pOH<5.9 the rate appeared to be independent of the pOH. In the intermediate range, pOH<5.9-6.9, corresponding to the natural pH of seawater, a first-order dependence on the pOH is obeyed. The important discrepancy in the literature between the second-order rate constant for NaCHO3 solutions and for seawater can be attributed predominantly to the incorrect assumption of a second-order pOH dependence in natural seawater. The results can be useful, for example, in predicting the effect of dumping acidic iron waste from the titanium-dioxide industry into the ocean.

All data in IMIS is subject to the VLIZ privacy policy Top | Authors