中国有色金属学报(英文版)
Transactions of Nonferrous Metals Society of China
| Vol. 11 No. 1 February 2001 |
——All-equilibrium φ-pH diagram for M-ligand-H2O system
（Department of Metallurgical Science and Engineering, Central South University,
Changsha 410083, P.R.China）
Abstract: A new viewpoint on metal complex system was proposed on traditional M-ligand-H2O system φ- pH diagrams. Simultaneous equilibrium principle and activity term method were used to plot all-equilibrium φ- pH diagrams for M-ligand-H2O systems based on the thermochemical database developed. The mathematical and computer algorithms were described with the Cu-NH3-H2O system as an example. More quantitative information on real hydrometallurgical processes can be obtained from these diagrams compared with the conventional Pourbaix φ- pH diagram.
Key words: activity term method; simultaneous equilibrium; metal-ligand-H2O system; nonlinear equation group
