The effect of ionic interactions on the oxidation of metals in natural waters

摘要: The effect of ionic interactions the major components natural waters on oxidation Cu(I) and Fe(II) has been examined. various ion pairs these metals have shown to different rates oxidation. For Fe(II), chloride sulfate are not easily oxidized. measured decrease in rate constant at a fixed pH solutions agrees very well with values predicted. (6 8) water seawater follow equation -d [Fe(II)]/dt = k1β1αFe/[H+] + k2β2αFe/[H+]2 where k1 k2 pseudo first order constants, β1 β2 hydrolysis constants for Fe(OH)+ Fe(OH)0. value αFE is fraction free Fe2+. (2.0 ±0.5 min−1) similar within experimental error. (1.2 × 105 28% its reasonable agreement predictions using an pairing model. For form −d ln [Cu(I)]/dt k0αCu+ k1β1αCu[Cl] was found where k0 (14.1 sec−1) (3.9 Cu+ CuCl0, formation CuCl0 αCu Cu+. Thus, unlike results complexes measurable