Reductive Dissolution of Metal Oxides

Stone, A. T., and J. J. Morgan (1987), "Reductive Dissolution of Metal Oxides", in W. Stumm, Ed., Aquatic Surface Chemistry, John Wiley and Sons, New York, 221 -252. 

Similarly, inner-sphere and outer-sphere mechanisms can be postulated for the reductive dissolution of metal oxide surface sites, as shown in Figure 2. Precursor complex formation, electron transfer, and breakdown of the successor complex can still be distinguished. The surface chemical reaction is unique, however, in that participating metal centers are bound within an oxide/hydroxide... 

In the reaction of reductive dissolution of metal oxides, the concentrations of the dissolved metals (Mn and Fe ) have been fixed at 1 [>,M to more accurately reflect their relative redox properties. This reaction is listed out of order so as not to separate it from the reactbn of formation of the bisulfide bn, HS. ... 

Stone TA, Morgan JJ (1987) Reductive dissolution of metal oxides. In W Stumm (ed) Aquatic surface chemistry Chemical processes at the particle water interface. WUey, New York pp 221-254... 

The reductive dissolution of metal oxides such as Mn(III/IV) oxides by organic reductants occurs by the following sequential steps (Stone, 1986) (1) diffusion of reductant molecules to the oxide surface, (2) surface chemical reaction, and (3) diffusion of reaction products from the oxide surface. Steps (1) and (3), which are transport steps, are influenced by both the interfacial concentration gradient and the electrical potential gradient due to the net charge of the oxide surface. 

A. T. Stone and J. J. Morgan, Reductive dissolution of metal oxides, Chap. 9 in Aquatic Surface Chemistry, ed. by W. Stumm, Wiley, New York, 1987. This chapter provides a comprehensive discussion of rate laws for reductive dissolution reactions, especially mathematical models. 

Max. organic decomposition, sulfide production, reductive dissolution of metal oxides, pH=7.0 Accumulation of FeS... 

---