Phase equilibrium of quaternary reciprocal system Cd2+, Na+//Cl-, SO42--H2O at 298 K

作者：Huang Yi^*; Ni Shi Jun; Sang Shi Hua; Wang Pei Dong

来源：Acta Physico - Chimica Sinica, 2008, 24(2): 333-337.

• cadmium
• quaternary reciprocal system
• isothermal method
• phase equilibrium

Phase equilibrium of quaternary system Cd2+, Na+//Cl-, SO42--H2O at 298 K was studied by isothermal method. The study showed that the quaternary system bearing Cd included Na2CdCl4 center dot 3H(2)O phase field, seven univariant curves, three co-saturation points and five crystal phase fields. The crystal fields of equilibrium solid phases were Na2SO4, CdSO4, CdCl2 center dot 2.5H(2)O, Na2CdCl4 center dot 3H(2)O and NaCl, respectively. The physico-chemical properties of solution in the quaternary system indicated regular change along with the increase of Cd2+ concentration. The results indicated that Cd salts possess quite high solubilities in the system studied, which means a strong transfer of Cd2+ and a high pollution risk of soil environment.

• 出版日期2008-2
• 单位成都理工大学