Novel Nanomaterial Membranes for Efficient Separation

A special issue of Membranes (ISSN 2077-0375). This special issue belongs to the section "Membrane Fabrication and Characterization".

Deadline for manuscript submissions: closed (30 April 2024) | Viewed by 1437

Special Issue Editors

School of Marine Science and Technology, Harbin Institute of Technology, Weihai 264209, China
Interests: nanomaterial membranes; functional membrane materials; 2D nanomaterials; water treatment; organic solvent nanofiltration
State Key Laboratory of Urban Water Resource and Environment, School of Environment, Harbin Institute of Technology, Harbin 150090, China
Interests: advanced oxidation processes; membrane water treatment; preparation and application of advanced nanomaterials
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Special Issue Information

Dear Colleagues,

Membrane-based technology has a broad range of separation abilities at the molecular level. It has been widely adopted in the field of separation because of its high separation efficiency, low cost, and simple modular design. Membrane materials play a crucial role in membrane separation performance. The most common membrane building blocks used to fabricate membranes are polymeric materials. However, traditional polymeric membranes still suffer various challenges such as wide pore size distribution, long-term stability, mechanical strength, and operation in harsh environments, which deteriorate their separation performance. To address this issue, various novel nanomaterials, such as graphene-based nanomaterials, metal–organic frameworks, covalent–organic frameworks, and MXene, have been explored as membrane materials to enhance separation efficiency. This has opened up a new research area centered around next-generation membranes fabricated by nanomaterials for separation purposes.      

This Special Issue, titled “Novel Nanomaterial Membranes for Efficient Separation”, focuses on recent advances in nanomaterial-based separation membranes. The Special Issue will accept original research articles and reviews on various subject areas, including (but are not limited to) (i) design and synthesis novel membrane nanomaterials; (ii) the characterization of novel membrane micro-structures; (iii) the fabrication and modification of nanomaterial-based membranes; (iv) the enhancement of membrane separation efficiency; and (v) mass transport and separation mechanisms of novel nanomaterial membranes.

Dr. Xiao Sui
Dr. Zhiqiang Sun
Guest Editors

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Keywords

  • nanomaterial
  • membrane material
  • separation membrane
  • seapration efficiency
  • membrane performance

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Published Papers (1 paper)

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Research

13 pages, 2635 KiB  
Article
Non-Dispersive Extraction of Chromium(VI) by Cyphos IL102/Solvesso 100 Using the Pseudo-Emulsion-Based Strip Dispersion Membrane Operation
by Francisco Jose Alguacil
Membranes 2024, 14(6), 129; https://doi.org/10.3390/membranes14060129 - 4 Jun 2024
Cited by 1 | Viewed by 939
Abstract
The removal of chromium(VI) from an acidic (HCl) medium through non-dispersive extraction with strip dispersion (NDXSD) was investigated using a microporous PVDF membrane support in a permeation cell. The ionic liquid Cyphos IL102 (phosphonium salt) in Solvesso 100 was used as an organic [...] Read more.
The removal of chromium(VI) from an acidic (HCl) medium through non-dispersive extraction with strip dispersion (NDXSD) was investigated using a microporous PVDF membrane support in a permeation cell. The ionic liquid Cyphos IL102 (phosphonium salt) in Solvesso 100 was used as an organic phase. In NDXSD, the stripping phase (NaOH) is dispersed in the organic phase on the cell side with an impeller stirrer adequate to form a strip dispersion. This pseudo-emulsion phase (organic + strip solutions) provides a constant supply of the Cyphos IL102/Solvesso 100 to the membrane phase. Various hydrodynamic and chemical parameters, such as variation in the feed and pseudo-emulsion stirring speeds, HCl and Cr(VI) concentrations in the feed phase, and carrier concentration, were investigated. Results indicated that the best chromium(VI) transport was obtained under the following conditions: feed and pseudo-emulsion stirring speeds of 1000 min−1 and 600 min−1, respectively; an HCl concentration in the feed phase of 0.1 M; a chromium concentration of 0.01 g/L in the same phase; and carrier concentration in the organic phase in the 2–5–10% v/v range. From the experimental data, several mass transfer coefficients were estimated: a bulk diffusion coefficient of 3.1·10−7 cm2/s and a diffusion coefficient of 6.1·10−8 cm2/s in the membrane phase and mass transfer coefficients in the feed (5.7·10−3 cm/s) and membrane phases (2.9·10−6 cm/s). The performance of the present system against other ionic liquids and the presence of base metals in the feed phase were investigated. Full article
(This article belongs to the Special Issue Novel Nanomaterial Membranes for Efficient Separation)
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