Cu-S-H2O系和Zn-S-H2O系E-pH图

运用同时平衡原理绘制并讨论了在不同总铜浓度 T(Cu)、总锌浓度 T(Zn)以及总硫浓度 T(S)下 ,Cu- S- H2 O和Zn- S- H2 O系的 E- p H图 .确定某一固体的稳定区时必须同时考虑该物质与体系中所有其它物质的平衡反应 ,当体系中所有固态物质的稳定区确定之后 ,剩下的区域即为溶液相稳定区 .在 Cu- S- H2 O系的 E- p H图中 ,在所研究的条件下没有出现 Cu2 O(s)的稳定区 .对 Cu- S- H2 O和 Zn- S- H2 O系而言 ,在高电势区出现单质硫的稳定区 .图 6 ,参 1

Generation of potential-pH diagrams for the Cu-S-H2O and Zn-S-H2O systems

Simultaneous equilibrium principle is applied in generation of potential-pH diagrams for some M-S-H 2 O systems (M=Cu and Zn). Determination for the stable region of one solid compound is finished with taking into consideration of all equilibriums between this solid and other species at the same time, and after stable regions of all solids have been determined, the left region is that of solution. Potential-pH diagrams for the Cu-S-H 2 O and Zn-S-H 2 O systems are generated and discussed on the basis of the principle, under different values of total copper concentration T(Cu), total Zinc concentration T(Zn) and total sulfur concentration T(S). For the Cu-S-H 2 O system, there are no stable regions of Cu 2 O(s) on condition that all sulfur-oxyanions are ignored., Stable species at high potentials for the Cu-S-H 2 O and Zn-S-H 2 O systems are elemental sulfur.6figs.,14refs.