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	Provedor de dados OMA (2) Autor Roekens, E.J. (2) Van Grieken, R.E. (2) Palavra-chave Dumping Marine chemistry Titanium compounds ANE (1) Iron (1) Kinetics (1) North Sea (1) Oxidation (1) Southern Bight (1) Mais... Tipo do documento Info:eu-repo/semantics/article (2) Ano 1983 (2) País Belgium (2) Idioma Inglês (2)		Ordenar por:  Relevância Autor Título Ano Registros recuperados: 2 Primeira ... 1 ... Última Kinetics of iron (II) oxidation in seawater of various pH OMA Roekens, E.J.; Van Grieken, R.E.. 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<sup>-</sup>), 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 NaCHO<sub>3</sub> solutions and for seawater can be attributed predominantly to the incorrect... Tipo: Info:eu-repo/semantics/article Palavras-chave: Iron; Kinetics; Oxidation. Ano: 1983 URL: http://www.vliz.be/nl/open-marien-archief?module=ref&refid=3293 Effects of titanium dioxide industry waste dumping on sea water chemistry OMA Roekens, E.J.; Van Grieken, R.E.. An investigation was made to determine the influence of the dumping of a 1000 ton day<sup>-1</sup>, on the average, of acid-iron waste from the titanium dioxide industry into the shallow but turbulent Southern Bight of the North Sea. This waste contains some 20% sulphuric acid and 2% iron. After the passage of the barge that discharges 10 ton of waste min<sup>-1</sup> into its wake, the vertical and horizontal distributions of the pH, iron-concentrations and turbidity were measured as a function of time. It appeared that a few seconds after the discharge and for a very brief period, the pH was down to approx. 4 and the Fe-concentration was 13 mg l<sup>-1</sup>. More than 1 min after the discharge a pH below 6 and an... Tipo: Info:eu-repo/semantics/article Palavras-chave: Dumping Marine chemistry Titanium compounds ANE; North Sea; Southern Bight. Ano: 1983 URL: http://www.vliz.be/nl/open-marien-archief?module=ref&refid=3292 Registros recuperados: 2 Primeira ... 1 ... Última

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