Utiliza este identificador para citar o vincular este elemento: http://hdl.handle.net/10553/2816
Títulos: Oxidation of Copper(I) in seawater at nanomolar levels
Autores/as: González, Aridane G. 
Santana-Casiano, J. Magdalena 
González-Dávila, Melchor 
Clasificación UNESCO: 2307 Química física
251002 Oceanografía química
Palabras clave: Oxidation
Seawater
Cu(I)
Reduction
Fecha de publicación: 2009
Resumen: The oxidation and reduction of copper in air-saturated seawater and NaCl solutions has been measured as a function of pH (7.17-8.49), temperature (5-35ºC) and ionic strength (0.1-0.7 M). The oxidation rate was fitted to an equation for sodium chloride and seawater valid at different pH and media conditions: k . . pH- . /T- . I . I k . . pH- . /T- . I . I (sw) (NaCl) log 5 036 0 514 1764 915 1101 0 233 log 5 221 0 609 1915 433 1818 0 408 = + + = + + The reduction of Cu(II) was studied in both media for different initial concentration of copper(II). When the initial Cu(II) concentration was 200 nM, the copper(I) produced was 20% and 9% for NaCl and seawater, respectively. Considering the copper(I) reduced from Cu(II), the speciation and the contribution of these species to the kinetic process was studied. The Cu(I) speciation is dominated by the CuCl2 - species. On the other hand, the neutral chloride CuCl species dominates the Cu(I) oxidation in the range 0.1 M to 0.7 M chloride concentrations.
URI: http://hdl.handle.net/10553/2816
ISBN: 978-84-692-9289-1
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