Study on the mechanisms for the influence of nanomaterials on the separation performance of nanocomposite membrane from a modeling perspective

Liu, Yatao; Sipe, Joana Marie; Xu, Wenhao; Zhu, Xuewu; Bai, Langming; Xu, Daliang; Li, Guibai; Wiesner, Mark R.

doi:10.1016/j.desal.2022.115740

Cited by 7 publications

(3 citation statements)

References 63 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…17 It assumes unidirectional transmembrane movement of compounds and an ideal solution. 18 Specifically, the absolute value of the volumetric…”

Section: Theorymentioning

confidence: 99%

“…The transport equation for ion movement is based on the extended Nernst–Planck equation, considering three phenomena: diffusion, electromigration, and convection . It assumes unidirectional transmembrane movement of compounds and an ideal solution . Specifically, the absolute value of the volumetric charge density (χ) is determined as a function of the concentration of counter-ions present at the feed/membrane interface, utilizing a Freundlich isotherm characterized by parameters s and q [eq (6)].…”

Section: Experiments and Theorymentioning

confidence: 99%

“… 17 It assumes unidirectional transmembrane movement of compounds and an ideal solution. 18 Specifically, the absolute value of the volumetric charge density (χ) is determined as a function of the concentration of counter-ions present at the feed/membrane interface, utilizing a Freundlich isotherm characterized by parameters s and q [eq (6)]. The basic equation is detailed in Table 2 .…”

Section: Experiments and Theorymentioning

confidence: 99%

See 2 more Smart Citations

Simulation of Nanofiltration Mass Transfer for Magnesium and Lithium Separation in Salt Lakes

Liu,

Li,

Guo

et al. 2024

ACS Omega

View full text Add to dashboard Cite

A mass transfer model to predict the transport processes of magnesium and lithium ions through porous media in salt lakes has been proposed, which is a combination of the extended Nernst−Planck equation and Donnan effect, accounting for ion diffusion, electromigration, and convection within membrane pores. First, the morphological structure, thickness, surface roughness, and hydrophilicity of the membrane were characterized as fixed parameters, indicating that the surface of the nanofiltration membrane is smooth with low roughness and strong hydrophilicity, resulting in a lower desalination rate but higher water flux. Subsequently, numerical calculations based on the model were conducted to establish a reasonable transport equation for predicting the concentration and retention rate of the main magnesium and lithium ions. When compared with the experimental results, a deviation of less than 5.5% is obtained, confirming the accuracy of the model in describing ion mass transfer. Finally, computational fluid dynamics techniques were employed to simulate the model equations in both the feed and permeate subdomains, demonstrating that the flow characteristics align with reality. Thus, the established transport model exhibits higher predictive accuracy for NF ion separation than one-dimensional models.

show abstract

“…17 It assumes unidirectional transmembrane movement of compounds and an ideal solution. 18 Specifically, the absolute value of the volumetric…”

Section: Theorymentioning

confidence: 99%

Section: Experiments and Theorymentioning

confidence: 99%