کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
202536 | 460608 | 2014 | 9 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: Experimental and modelling studies of ion exchange equilibria between zeolite NaY and an electrolytic solution of iron Experimental and modelling studies of ion exchange equilibria between zeolite NaY and an electrolytic solution of iron](/preview/png/202536.png)
In this work, ion exchange equilibrium in NaY-packed columns was examined and equilibrium data was generated for Na+ ↔ Fe2+ in zeolite. In this context, different mathematical models were evaluated to describe the equilibrium: the through adsorption approach (Langmuir type model, Jain & Snoeyink model and Langmuir–Freundlich model), the ion exchange approach (the ideal and non-ideal mass action law) and the thermodynamic approach (IAST—ideal adsorbed solution theory and RAST—real adsorbed solution theory). Experiments were carried out at 30 °C using solutions of 1, 2 and 3 meq L−1 at pH 4.5 and a column flow rate of 8 mL min−1. Fe(II) was retained through ion exchange followed by adsorption. The non-ideal mass action law best fit the experimental data as it predicted the exchange process of electrolytes and detected the adsorption multilayer.
Journal: Fluid Phase Equilibria - Volume 372, 25 June 2014, Pages 76–84