| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 7020160 | Journal of Membrane Science | 2018 | 10 Pages |
Abstract
In this study, experimental data on the sulphuric acid rejection for pH values from 1 to 3 have been obtained with an aromatic poly(piperazine)amide membrane (NF270) at various trans-membrane pressures. The results were modelled by a novel version of the Solution-Electro-Diffusion model taking into account equilibrium reactions, and a general (quasi)analytical solution was obtained for the transport of weak electrolytes of arbitrary valence type. The equilibrium weak acid reaction made the total sulphate (SO42â/HSO4â) rejection decrease strongly as the fraction of single-charged hydrogen sulphate (HSO4â) in the feed increased. From the modelling procedure, permeances to H+, HSO4â and SO42â over the studied pH range were determined.
Related Topics
Physical Sciences and Engineering
Chemical Engineering
Filtration and Separation
Authors
Julio López, Mònica Reig, Andriy Yaroshchuk, Edxon Licon, Oriol Gibert, José Luis Cortina,