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- Title
Analysis of the Concentration Polarization of Technological Solutions in the Process of Their Nanofiltrational Separation.
- Authors
Lazarev, S. I.; Shestakov, K. V.; Kotenev, S. I.; Ignatov, N. N.
- Abstract
A method of determining the nonstationary concentration polarization of a solution, flowing in a plane channel, in the process of nanofiltration of the solution flow is proposed. The concentration polarization of the aqueous solutions, containing 0.5 kg/m3 of ZnSO4 and SnSO4, in the process of their nanofiltrational separation was analyzed. It was established that an increase in the transmembrane pressure in a separation apparatus in the range Pm = 0.5–2.0 MPa causes the coefficient of concentration polarization of the ZnSO4 and SnSO4 solutions in this apparatus to increase in the ranges θ = 1.340–1.436 and θ = 1.351–1.430, respectively. A calculation of the time of work of a membrane in a stationary regime and the volume of the permeate obtained in it has shown that, before a membrane is regenerated, the nanofiltrational separation of ZnSO4 and SnSO4 from their solutions at a definite pressure can be conducted for the times tm = 2070–2791 s and tm = 2893–2036 s, respectively. An increase in the transmembrane pressure causes these times to decrease and the amounts of the permeates obtained for the stationary-regime time to increase from 0.200 to 0.266 dm3 and from 0.202 to 0.262 dm3, respectively
- Subjects
TIME pressure; NANOFILTRATION; AQUEOUS solutions; CHANNEL flow
- Publication
Journal of Engineering Physics & Thermophysics, 2023, Vol 96, Issue 4, p1045
- ISSN
1062-0125
- Publication type
Article
- DOI
10.1007/s10891-023-02768-z