某些Au(Ⅲ)、Au(Ⅰ)配离子在溶液中扩散的研究

Study on the Diffusion of Some Au (Ⅲ) and Au (Ⅰ) Complexes in Solution

从氰化物及盐酸溶液中用吸附和离子交换法提金是现代水冶金的发展主流[1].吸金后常用洗脱剂为硫脲、亚硫酸钠和硫氰酸盐等.金在这些溶液中均以配离子形式存在,它们在溶液中的扩散系数D是决定两相总的传质系数的主要参数.

The diffusion coefficients of some of the Au(Ⅲ),An(Ⅰ)-complexes and the diffusion activation energy of AuCl_(4)^(-)in HCl solution have been determined at 25℃by capillary method.Analysing the results obtained in combination with other published data,we suggest that both the charge number and mass of anionic metal-complexes may be the prime factors determining the magnitude of diffusion coefficient.