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Analysis of the Concentration Polarization of Technological Solutions in the Process of Their Nanofiltrational Separation

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Journal of Engineering Physics and Thermophysics Aims and scope

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

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Authors and Affiliations

  1. Tambov State Technical University, 106/5 Sovetskaya Str, Tambov, 392000, Russia

    S. I. Lazarev, K. V. Shestakov, S. I. Kotenev & N. N. Ignatov

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  1. S. I. Lazarev
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  2. K. V. Shestakov
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  3. S. I. Kotenev
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  4. N. N. Ignatov
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Correspondence to K. V. Shestakov.

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Translated from Inzhenerno-Fizicheskii Zhurnal, Vol. 96, No. 4, pp. 1046–1052, July–August, 2023

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Lazarev, S.I., Shestakov, K.V., Kotenev, S.I. et al. Analysis of the Concentration Polarization of Technological Solutions in the Process of Their Nanofiltrational Separation. J Eng Phys Thermophy 96, 1045–1051 (2023). https://doi.org/10.1007/s10891-023-02768-z

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