CAJ | 학술논문

用等压法测定了298．15 K时CuSO4-NiSO4-H2 O溶液体系在离子强度范围为0．3877～5．7986 mol· kg-1内的渗透系数，用Pitzer离子相互作用模型对实验结果进行参数化研究，获得了CuSO4和NiSO4纯盐参数以及混盐参数，渗透系数的模型计算值与实验值的相对偏差为±0．03，表明Pitzer模型能较好描述298．15 K时该溶液体系的热力学性质；得到了该溶液体系中离子平均活度系数随离子强度的变化规律．
용등압법측정료298．15 K시CuSO4-NiSO4-H2 O용액체계재리자강도범위위0．3877～5．7986 mol· kg-1내적삼투계수，용Pitzer리자상호작용모형대실험결과진행삼수화연구，획득료CuSO4화NiSO4순염삼수이급혼염삼수，삼투계수적모형계산치여실험치적상대편차위±0．03，표명Pitzer모형능교호묘술298．15 K시해용액체계적열역학성질；득도료해용액체계중리자평균활도계수수리자강도적변화규률．
The osmotic coefficients of the CuSO4-NiSO4-H2 O system at 298.15 K was determined by the iso-piestic method in the ion strength range from 0.387 7~5.798 6 mol/kg.The experimental data were represented by the pitzer ion-interaction model, and the Pitzer ion interaction parameters were obtained from resulting osmotic coefficients by multiple linear regression.The osmotic coefficients values determined experimentally and those cal-culated by the model in reasonable agreement indicated that the Pitzer model can describle the system's thermody-namics properties well at 298 .15 K.The function between acitivity coefficients and the ionic strength was studied.