Progress in adsorptive membranes for separation – A review

Hao, Shuang; Jia, Zhiqian; Wen, Jie; Li, Suoding; Peng, Wei; Huang, Renyao; Xu, Xiaonan

doi:10.1016/j.seppur.2020.117772

Cited by 92 publications

(50 citation statements)

References 68 publications

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“…Micellar enhanced UF and polymer enhanced UF can be used to treat industrial wastewater containing heavy metal ions. 4 UF coupling reduction 1,[5][6][7][8] and UF coupling adsorption (adsorptive UF) [9][10][11] are usually applied to purify water with a low concentration of heavy metal ions. Because of less toxicity of trivalent chromium (Cr[III]), reduction is an effective method of treatment of Cr(VI).…”

Section: Introductionmentioning

confidence: 99%

Modification and acidification of polysulfone as effective strategies to enhance adsorptive ability of chromium (VI) and separation properties of ultrafiltration membrane

Huang

Cai

Zhou

2022

J of Applied Polymer Sci

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In order to improve the hydropilicity, polysulfone was first modified by grafting diethanolamine and further made into the ultrafiltration membranes by a phase inversion process. Ultrafiltration membranes were characterized by nuclear magnetic resonance spectrum, contact angle, thermogravimetric analysis, differential scanning calorimetry, scanning electron microscopy, adsorption, and ultrafiltration experiments. The ultrafiltration membrane containing tertiary amine groups had a 99.2% rejection to bovine serum albumin (BSA), 235.2 L m−2 h−1 pure water flux and 78.6% flux recovery rate. Usually, the ultrafiltration membrane containing tertiary amine groups has a low rejection and a poor adsorptive ability to Cr(VI) in the neutral condition. A novel strategy of acidification in advance was adopted to adjust the separation performance of the polysulfone ultrafiltration membrane containing tertiary amine groups. The pre‐acidification strategy could improve the Cr(VI) rejection from below 10% to 100% in the neutral condition, since ultrafiltration membranes acidified in advance did not lose its H+ in storage. Moreover, the acidification could improve the glass transition temperature and only caused a slight decrease of water flux and BSA rejection.

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Section: Introductionmentioning

confidence: 99%

Modification and acidification of polysulfone as effective strategies to enhance adsorptive ability of chromium (VI) and separation properties of ultrafiltration membrane

Huang

Cai

Zhou

2022

J of Applied Polymer Sci

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“…Membranes are separators used to separate various substances in a gas mixture [1] or liquid [2][3]. This technology continues to develop due to its high selectivity properties [4][5] as well as its ability to be easily synthesized and applied [6][7].…”

Section: ■ Introductionmentioning

confidence: 99%

“…The polyurethane membrane is also applied as a separator either by filtration [15][16] or adsorption [2,17]. The strength and physical condition of the membrane significantly affect the success of the separation process, using a large pressure driving force and a concentration gradient during filtration.…”

Section: ■ Introductionmentioning

confidence: 99%

Optimization of Polyurethane Membrane Physical Characteristics of Red Seaweed Biomass Using a Box-Behnken Design

et al. 2021

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The polyurethane membrane is used as a separator either by filtration or adsorption, and this process is significantly affected by its strength and physical condition. We synthesized polyurethane membranes using red seaweed with Gracilaria sp as a hydroxyl source. The Box-Behnken Design of the Response Surface Methodology (RSM) using Software Design Expert Version 10.0.3.0 with three factors (TRL, TDI, and Glycerin). The F-value of 0.42 suggests that the membrane is less fit, while the P-value of 75.10% indicates that the quadratic design model is suitable for data analysis of physical characteristics. The optimal physical characteristics were obtained at a composition of 0.233 g TRL, 2.675 g TDI, and 0.254 g glycerin with a physical point of 6.5 (strong and elastic). Optimal polyurethane membrane has good thermal and mechanical properties at temperatures of Tg 58 °C, Tm 322 °C, and Td 534 °C, as well as stress and nominal strain values of 69.3 MPa and 5.74%. Polyurethane membrane synthesized from red seaweed has good physical properties. The result of this research is the basis for the development of polyurethane membrane applications from red seaweed.

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“…Membrane adsorption is a pressure-driven dynamic membrane-based adsorption process, which combines the merit of both adsorption and membrane separation [17][18][19] . Compared to traditional pressure-driven membranes with size sieving as the dominant separation mechanism, adsorptive membranes utilize more speci c membrane-solute interactions like electrostatic interactions, π-π interactions, van der Waals forces, and hydrogen bonding to achieve highly selective and fast separation of small organic molecules [20][21] .…”

Section: Introductionmentioning

confidence: 99%

“…However, the application of membrane adsorption is hindered by the lack of adsorptive membranes with su cient processing capacity. Adsorptive membranes are usually prepared by post-grafting a nity ligands or adsorptive ller mixing in traditional polymer materials 15,20 . Due to the limited speci c surface area and adsorption sites incorporated, the overall processing capacity of these conventional adsorptive membranes is very low, mostly in the range of 0.01-1 g m −2 .…”

Section: Introductionmentioning

confidence: 99%

Microporous Polymer Adsorptive Membranes with Unprecedented Processing Capacity for Molecular Separation

Wang¹,

Luo²,

et al. 2021

Preprint

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Trade-off between permeability and nanometer-level selectivity is an inherent shortcoming of membrane-based separation of molecules, while most highly porous materials with high adsorption capacity lack solution processability and stability for achieving adsorption-based molecule separation. We hereby report a hydrophilic amidoxime modified polymer of intrinsic microporosity (AOPIM-1) as a membrane adsorption material to selectively adsorb and separate small organic molecules from water with ultrahigh processing capacity. The membrane adsorption capacity for Rhodamine B reaches 26.114 g m−2, 10~1000 times higher than previously reported adsorptive membranes. Meanwhile, the membrane achieves >99.9% removal of various nano-sized organic molecules with water flux 2 orders of magnitude higher than typical pressure-driven membranes of similar rejections. This work confirms the feasibility of microporous polymers for membrane adsorption with unprecedented capacity, and provides the possibility of adsorptive membranes for molecular separation.

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Progress in adsorptive membranes for separation – A review

Cited by 92 publications

References 68 publications

Modification and acidification of polysulfone as effective strategies to enhance adsorptive ability of chromium (VI) and separation properties of ultrafiltration membrane

Modification and acidification of polysulfone as effective strategies to enhance adsorptive ability of chromium (VI) and separation properties of ultrafiltration membrane

Optimization of Polyurethane Membrane Physical Characteristics of Red Seaweed Biomass Using a Box-Behnken Design

Microporous Polymer Adsorptive Membranes with Unprecedented Processing Capacity for Molecular Separation

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