Removal of polystyrene nanoplastic beads using gravity-driven membrane filtration: Mechanisms and effects of water matrices

Wan, Hongyi; Shi, Ke Ji; Yi, Zhiyuan; Ding, Peng; Zhuang, Linzhou; Mills, Rollie; Bhattacharyya, Dibakar; Li, Zhiheng

doi:10.1016/j.cej.2022.138484

Cited by 42 publications

(22 citation statements)

References 40 publications

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“…The present work reported the maximum water flux of 20-PGT as 8163 L m –2 h –1 at 5 psi pressure, which is much higher than the commercially available Millipore MFs. Moreover, it showed a higher gravity-driven water flux of 793 L m –2 h –1 compared to the recently reported studies . So, the 20-PGT electrospun composite membrane has been chosen for the MNP separation and dye adsorption studies.…”

Section: Resultsmentioning

confidence: 99%

“…20-PGT electrospun fibers were not visible due to the agglomeration of NPs and their strong adsorptive interaction with 20-PGT fibers. Overall, the separation mechanisms identified for ABS, PS, and PMMA MNP separations were size-exclusive interception by the membrane, adsorption, and a combined effect of size-exclusive effect and adsorption phenomena, respectively (Figure g) …”

Section: Resultsmentioning

confidence: 99%

“…Parameters such as percentage rejection, flux recovery ratio (FRR), and relative flux decay (RFD) were utilized to investigate the MNP separation performance. The removal of MNPs was expressed by removal efficiency (%), and it was calculated using the following equation normalR normale normalm normalo normalv normala normall .25em normale normalf normalf normali normalc normali normale normaln normalc normaly ( % ) = C normalf − C normalp C normalf × 100 where C p and C f represent the permeate and feed concentrations (ppm), respectively .…”

Section: Methodsmentioning

confidence: 99%

“…Overall, the separation mechanisms identified for ABS, PS, and PMMA MNP separations were size-exclusive interception by the membrane, adsorption, and a combined effect of size-exclusive effect and adsorption phenomena, respectively (Figure 7g). 24 The stability of the membrane after MNP filtration was investigated. FE-SEM micrographs of 20-PGT after ABS MP filtration and thoroughly cleaned membrane after filtration are shown in Figure S7.…”

Section: Mnp Separation and Mechanismsmentioning

confidence: 99%

“…A self-designed glass apparatus of 5.7 cm 2 crosssectional area was used to investigate the gravity-driven water flux. 24 The electrospun membrane was sandwiched between the upper and lower portions of the glass apparatus without any support. The pressure was calculated as 0.135 psi (931 Pa) during the gravitydriven flux.…”

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confidence: 99%

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Electrospun Polyurethane Nanofiber Membranes for Microplastic and Nanoplastic Separation

Juraij

Ammed

Chinglenthoiba

et al. 2023

ACS Appl. Nano Mater.

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Multifunctional materials for industrial wastewater treatment are in high demand due to the contamination of microand nanoplastics (MNPs) and dyes. Herein, we demonstrate a polyurethane-based (PU) electrospun composite membrane for MNP separation and selective methylene blue (MB) adsorption. The optimized 20 wt % graphene oxide-montmorillonite (GO-Mt)-loaded nanofibrous composite membrane (20-PGT) exhibited its superhydrophilicity with a water contact angle of 0°and high water flux. It displayed a maximum pressure-driven water flow of 8163 L m −2 h −1 and a gravity-driven water flux of 793 L m −2 h −1 . Three model MNPs, such as acrylonitrile butadiene styrene (ABS), polystyrene (PS), and poly(methyl methacrylate) (PMMA) with various sizes, have been demonstrated. The adsorptive separation and size-exclusive interception mechanisms were observed for nanoplastics (NPs) and microplastics (MPs), respectively. Cake formation, intermediate blocking, and standard blocking mechanisms were followed during the filtration of ABS MPs, PMMA NPs, and PS NPs, respectively. Additionally, the composite membrane exhibited selective MB adsorption from the mixture of dyes, with a maximum adsorption capacity of 417 mg g −1 . Langmuir adsorption isotherm and pseudo-second-order kinetics define the adsorption isotherm and adsorption kinetics, respectively. The fabricated, robust fibrous composite membrane opens a wider door for the removal of MNPs and MB from contaminated water.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Section: Mnp Separation and Mechanismsmentioning

confidence: 99%

mentioning

confidence: 99%

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Electrospun Polyurethane Nanofiber Membranes for Microplastic and Nanoplastic Separation

Juraij

Ammed

Chinglenthoiba

et al. 2023

ACS Appl. Nano Mater.

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Remediation Strategies for Micro(Nano)Plastics

Villa,

Rocha,

Flores

et al. 2024

Toxic Effects of Micro‐ and Nanoplastics

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Development of crosslinked polyvinyl alcohol nanofibrous membrane for microplastic removal from water

Gopakumar,

Ccanccapa‐Cartagena,

Bell

et al. 2024

J of Applied Polymer Sci

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This study presents the development of an innovative nanofibrous membrane to remove microplastics (MPs) from drinking water. This membrane exhibits additional functionality in removing lead (Pb), highlighting its promising potential for utilization as a point‐of‐use (POU) device. The polyvinyl alcohol (PVA) nanofibrous membranes are crosslinked using glutaraldehyde, and their efficiencies in the removal of MPs are evaluated. The results show that crosslinking the 7 and 10 wt% PVA nanofibers increases their average diameters to 330 and 581 nm, respectively, and enhances their surface area. The treatment efficiency of crosslinked PVA fibrous media is evaluated using polyethylene (PE) (5 μm ≤d ≤ 25 μm) and polystyrene (PS) MPs (d ≤ 1 μm). The filtration efficiencies of both 7 and 10 wt% c‐PVA nanofibrous media are found to be 99.8% ± 0.1% in the removal of PE MPs at pH 8. Further examination of the filtration efficiency in the removal of PS MPs shows that the highest removal efficiency achieved was 77.3% ± 1.4% at a pH of 6. Additionally, the lead removal efficiency of this fibrous membrane in flow‐through experiments is examined. Results show a pH‐dependent lead removal efficiency, in which the greatest efficiency of 69% is found at pH 6.

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Removal of polystyrene nanoplastic beads using gravity-driven membrane filtration: Mechanisms and effects of water matrices

Cited by 42 publications

References 40 publications

Electrospun Polyurethane Nanofiber Membranes for Microplastic and Nanoplastic Separation

Electrospun Polyurethane Nanofiber Membranes for Microplastic and Nanoplastic Separation

Remediation Strategies for Micro(Nano)Plastics

Development of crosslinked polyvinyl alcohol nanofibrous membrane for microplastic removal from water

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