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Title
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Kinetics of iron(II) oxidation in seawater of various pH
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Author
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Abstract
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| The rate of iron(II) oxidation in North Sea water of pH 5.510 in the range 1025°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 5.96.9, 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. |
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Language
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English
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Source (journal)
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Marine chemistry. - Amsterdam, 1972, currens
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Publication
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Amsterdam
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1983
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ISSN
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0304-4203
[print]
1872-7581
[online]
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DOI
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10.1016/0304-4203(83)90014-2
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Volume/pages
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13
:3
(1983)
, p. 195-202
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ISI
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A1983RD52600003
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Full text (Publisher's DOI)
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Full text (publisher's version - intranet only)
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