Data/hora: 15/06/2024 18:43:25

Provedor de dados: | 27
País: | Belgium
Título: | Kinetics of iron (II) oxidation in seawater of various pH
Autores: | Roekens, E.J.; Van Grieken, R.E.
Data: | 1983
Ano: | 1983
Palavras-chave: | Iron; Kinetics; Oxidation.
Resumo: | 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&lt;sup&gt;-&lt;/sup&gt;), found by several investigators for synthetic solutions, was confirmed in seawater, but only for pOH&gt;6.9. For pOH&lt;5.9 the rate appeared to be independent of the pOH. In the intermediate range, pOH&lt;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 NaCHO&lt;sub&gt;3&lt;/sub&gt; 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.
Tipo: | Info:eu-repo/semantics/article
Idioma: | Inglês
Identificador: | http://www.vliz.be/nl/open-marien-archief?module=ref&refid=3293
Fonte: | %3Ci%3EMar.+Chem.+13%3C%2Fi%3E%3A+195-202
Fonte: | info:eu-repo/semantics/restrictedAccess