کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1558890 | 1513822 | 2013 | 7 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: Thermodynamic model for acidic Ni(II) sulfate from solubility data Thermodynamic model for acidic Ni(II) sulfate from solubility data](/preview/png/1558890.png)
Acidic nickel sulfate solutions are generated in a large scale in the hydro- and pyrometallurgical industries. They are also produced in many industrial processes from nickel refining to surface finishing of metals by electroplating. Acid mine drainage has long been a significant environmental problem in coal and metal mining. The demand of recycling and reuse of materials has increased significantly especially in EU. Dumping a neutralized deposit is not an option any more. Thus, several techniques of recycling and reuse of sulfuric acid and/or metal sulfates from the side streams are needed.When developing alternative solutions, a better understanding of the thermodynamic behavior of NiSO4–H2SO4–H2O system is needed. In this study a thermodynamic model of this system has been developed in order to yield a thermodynamically consistent set of values for the solubility of nickel sulfate in a wide temperature and concentration range. The current model presents the experimental data available with a good accuracy and consistently up to 90 °C, and sulfuric acid concentrations up to 10 mol/kg. The model also predicts well the solubility measurements available in dilute up to 1.55 mol/kg sulfuric acid solutions at 200–250 °C.
► We modeled H2O–NiSO4–H2SO4 system using the Pitzer activity coefficient approach.
► Lots of solubility data were compiled from the literature.
► Our model presents experimental data available consistently up to 90 °C.
Journal: Calphad - Volume 40, March 2013, Pages 41–47