本文将Pitzer公式用于高浓度H_2SO_4-CuSO_4混合电解质溶液,回归出混合参数θ和φ,求出水相中各组分的活度系数,观察到萃取过程中金属离子活度的变化规律。测定了体系的界面张力,并用活度回归出动态界面张力公式,由此得到界面相中各组分的界面过剩情况。
The activity coefficieni of each compound in H_2SO_4-CuSO_4 solutionwas calculated by applying the Pitzer's equation and 6 Pitzer's mixing parametersθ and ψ were evaluated. The change of the activities of the metallic ions duringextraction was examined. The interfacial tension of the system was also measuredby drop weight method. The interfacial excesses of all compounds were calculatedfrom the interfacial tension equation which is expressed in the terms of activities.The results show that H~+ and Cu~(2+) are positive adsorption but CuR_2, (HR)_2, SO_4~(2-)and HSO_4~- are negative adsorption.
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