Oxidation of copper(I) in seawater at nanomolar levels |
| |
| Authors: | M Gonzlez-Dvila JM Santana-Casiano AG Gonzlez N Prez FJ Millero |
| |
| Institution: | aDepartamento de Química, Facultad de Ciencias del Mar, Universidad de Las Palmas de Gran Canaria, Campus de Tafira, 35017 Las Palmas, Spain;bRosentiel School of Marine and Atmospheric Science, University of Miami, 4600 Rickenbacker Causeway, Miami, Fl 33149, USA |
| |
| Abstract: | The oxidation and reduction of nanomolar levels of copper in air-saturated seawater and NaCl solutions has been measured as a function of pH (7.17–8.49), temperature (5–35 °C) and ionic strength (0.1–0.7 M). The oxidation rates were fitted to an equation valid at different pH and ionic strength conditions in sodium chloride and seawater solutions:The reduction of Cu(II) was studied in both media for different initial concentrations of copper(II). When the initial Cu(II) concentration was 200 nM, the copper(I) productions were 20% and 9% for NaCl and seawater, respectively. The effect of speciation of copper(I) reduced from Cu(II) on the rates 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 of 0.1 M to 0.7 M chloride concentrations. |
| |
| Keywords: | Kinetic Copper Oxidation Reduction Seawater Oxygen |
| 本文献已被 ScienceDirect 等数据库收录！ |
|
