Brine desalination via pervaporation using kaolin-intercalated hydrolyzed polyacrylonitrile membranes

Fareed, Hasan; Qasim, Ghulam Hussain; Jang, Jaewon; Lee, Woojin; Han, Seunghee; Kim, In Soo

doi:10.1016/j.seppur.2021.119874

Cited by 20 publications

(7 citation statements)

References 60 publications

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“…PAN fiber membranes have a porous structure from the cross‐linking of fibers with PA contact at the surface of the fibers. Fiber membranes have significantly increased specific surface area compared to traditional membranes and are extensively used in the ion or dye adsorption 8,20,22–27,29,30,37 …”

Section: Resultsmentioning

confidence: 99%

“…Polyacrylonitrile (PAN) nanofiber membranes have been extensively applied on microfiltration, ultrafiltration, emulsified oil/water separation, and desalination, 20–28 due to its good weather and UV resistance, good acid resistance, high temperature resistance, and organic solvent resistance 29–31 . Multiple solutions of chemical modifications have been designed and tested in the previous studies in order to strengthen the adsorption of heavy metal ions 26,32 .…”

Section: Introductionmentioning

confidence: 99%

“…[7][8][9][10][11][12][13][14][15][16][17][18] The adsorption method, also called chemisorption, is a method that adsorbs heavy metals in wastewater by substantial sharing of electrons between the surface of adsorbent and metal ions to create a covalent or ionic bond, 9,10,17,19 and it is generally preferred compared to the other methods regarding its simplicity, high efficiency, cost effectiveness, and environmental friendliness. 17 Polyacrylonitrile (PAN) nanofiber membranes have been extensively applied on microfiltration, ultrafiltration, emulsified oil/water separation, and desalination, [20][21][22][23][24][25][26][27][28] due to its good weather and UV resistance, good acid resistance, high temperature resistance, and organic solvent resistance. [29][30][31] Multiple solutions of chemical modifications have been designed and tested in the previous studies in order to strengthen the adsorption of heavy metal ions.…”

Section: Introductionmentioning

confidence: 99%

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Phytic acid modified polyacrylonitrile nanofiber membranes: Fabrication, characterization, and optimization for Pb²⁺ adsorption

Li,

Liu,

Chi

et al. 2024

Polymer Engineering & Sci

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Phytic acid (PA) modified polyacrylonitrile (PAN) nanofiber membranes for heavy metal adsorption were fabricated using electrospinning for the first time, and its mechanical properties and heavy metal adsorption under various conditions were tested. The results demonstrated that PA modification improved the mechanical properties of PAN nanofiber membranes at low modification ratio due to increased intermolecular hydrogen bonds and cross‐linking. The highest breaking strength and elongation at break were 70.1% and 31.5% over PAN without modification when the PA:PAN ratio was close to 1:5. The Pb2+ absorption tests in the water solutions demonstrated that the optimal PA:PAN ratio was 1:1, the optimal temperature was 30°C, and the optimal pH was 7. With the optimal parameters, the adsorption capacity reached the maximum and equilibrium after 4 h. The adsorption capacities increased with higher initial Pb2+ concentrations. The highest adsorption capacity in this study was approximately 240.1 mg g−1 at the initial Pb2+ concentration of 750.72 mg L−1. In addition, after de‐adsorption process, the 1:1 PA modified membranes maintained 91.9% re‐adsorption capacities compared to primary adsorption. Consequently, the PA‐modified PAN nanofiber membranes showed promising potentials of metal ion adsorption in wastewater treatment.Highlights Phytic acid modified polyacrylonitrile nanofiber membranes were fabricated. Low ratio modification improved the mechanical properties. The optimal modification ratio for Pb2+ adsorption is 1:1. The maximum Pb2+ adsorption capacity was 240.1 mg g−1 in this study. The membranes maintained 91.9% capacities at re‐adsorption tests.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Phytic acid modified polyacrylonitrile nanofiber membranes: Fabrication, characterization, and optimization for Pb²⁺ adsorption

Li,

Liu,

Chi

et al. 2024

Polymer Engineering & Sci

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“…For the measurement of fiber diameter, as well as the determination of average fiber diameter and average pore area along with standard deviation (SD), ten readings were taken using Image J software ( www.imagej.nih.gov , accessed on 1st May 2021). The pore size is determined using theoretical calculations presented in the form of a pore radius 29 . These calculations rely on equations as described in Eqs.…”

Section: Methodsmentioning

confidence: 99%

Enhancing protein trapping efficiency of graphene oxide-polybutylene succinate nanofiber membrane via molecular imprinting

Sathirapongsasuti,

Panaksri,

Jusain

et al. 2023

Sci Rep

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Filtration of biological liquids has been widely employed in biological, medical, and environmental investigations due to its convenience; many could be performed without energy and on-site, particularly protein separation. However, most available membranes are universal protein absorption or sub-fractionation due to molecule sizes or properties. SPMA, or syringe-push membrane absorption, is a quick and easy way to prepare biofluids for protein evaluation. The idea of initiating SPMA was to filter proteins from human urine for subsequent proteomic analysis. In our previous study, we developed nanofiber membranes made from polybutylene succinate (PBS) composed of graphene oxide (GO) for SPMA. In this study, we combined molecular imprinting with our developed PBS fiber membranes mixed with graphene oxide to improve protein capture selectivity in a lock-and-key fashion and thereby increase the efficacy of protein capture. As a model, we selected albumin from human serum (ABH), a clinically significant urine biomarker, for proteomic application. The nanofibrous membrane was generated utilizing the electrospinning technique with PBS/GO composite. The PBS/GO solution mixed with ABH was injected from a syringe and transformed into nanofibers by an electric voltage, which led the fibers to a rotating collector spinning for fiber collection. The imprinting process was carried out by removing the albumin protein template from the membrane through immersion of the membrane in a 60% acetonitrile solution for 4 h to generate a molecular imprint on the membrane. Protein trapping ability, high surface area, the potential for producing affinity with proteins, and molecular-level memory were all evaluated using the fabricated membrane morphology, protein binding capacity, and quantitative protein measurement. This study revealed that GO is a controlling factor, increasing electrical conductivity and reducing fiber sizes and membrane pore areas in PBS-GO-composites. On the other hand, the molecular imprinting did not influence membrane shape, nanofiber size, or density. Human albumin imprinted membrane could increase the PBS-GO membrane’s ABH binding capacity from 50 to 83%. It can be indicated that applying the imprinting technique in combination with the graphene oxide composite technique resulted in enhanced ABH binding capabilities than using either technique individually in membrane fabrication. The suitable protein elution solution is at 60% acetonitrile with an immersion time of 4 h. Our approach has resulted in the possibility of improving filter membranes for protein enrichment and storage in a variety of biological fluids.

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“…In the literature, mineral clays, such as montmorillonite, laponite, graphite, and LDH, have been used as a filler to produce nanocompositesusing in situ emulsion polymerization [9,[24][25][26]. However, only a few studies deal with kaolinite, and they tend to consider other polymers, such as polyacrylonitrile and polymethylmethacrylate [26,27].…”

Section: Introductionmentioning

confidence: 99%

The Stability and Properties of Polystyrene/Kaolinite Nanocomposites during Synthesis via Emulsion Polymerization

et al. 2023

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The aim of this work was to study the stability and morphological properties of polystyrene latex containing kaolinite as a filler during the process of synthesis of nanocomposites viaemulsion polymerization. Nanocomposites with 1, 3, and 5 wt% of kaolinite were prepared. Latexes with 1 to 3 wt% of kaolinite were stable during the polymerization reaction. Hydrodynamic diameters of 93.68 and 82.11 nm were found for latexes with 1 and 3 wt% of kaolinite, respectively. The quantities of 1 to 3 wt% of kaolinite added during the reaction did not influence the reaction conversion curves or the number of particles. X-ray diffraction (XRD) and unconventional techniques of scanning electron microscopy (SEM) and high-resolution transmission electron microscopy (HRTEM) showed the presence of exfoliated and intercalated structures of the kaolinite.

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Brine desalination via pervaporation using kaolin-intercalated hydrolyzed polyacrylonitrile membranes

Cited by 20 publications

References 60 publications

Phytic acid modified polyacrylonitrile nanofiber membranes: Fabrication, characterization, and optimization for Pb²⁺ adsorption

Phytic acid modified polyacrylonitrile nanofiber membranes: Fabrication, characterization, and optimization for Pb²⁺ adsorption

Enhancing protein trapping efficiency of graphene oxide-polybutylene succinate nanofiber membrane via molecular imprinting

The Stability and Properties of Polystyrene/Kaolinite Nanocomposites during Synthesis via Emulsion Polymerization

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Brine desalination via pervaporation using kaolin-intercalated hydrolyzed polyacrylonitrile membranes

Cited by 20 publications

References 60 publications

Phytic acid modified polyacrylonitrile nanofiber membranes: Fabrication, characterization, and optimization for Pb2+ adsorption

Phytic acid modified polyacrylonitrile nanofiber membranes: Fabrication, characterization, and optimization for Pb2+ adsorption

Enhancing protein trapping efficiency of graphene oxide-polybutylene succinate nanofiber membrane via molecular imprinting

The Stability and Properties of Polystyrene/Kaolinite Nanocomposites during Synthesis via Emulsion Polymerization

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Phytic acid modified polyacrylonitrile nanofiber membranes: Fabrication, characterization, and optimization for Pb²⁺ adsorption

Phytic acid modified polyacrylonitrile nanofiber membranes: Fabrication, characterization, and optimization for Pb²⁺ adsorption