Streaming potential for identification of foulants adsorption on PVDF membrane surface

Liu, Jiadong; Xiong, Jingxue; Jü, Xin; Gao, Bo; Wang, L.; Sillanpää, Mika

doi:10.1016/j.memsci.2018.09.024

Cited by 27 publications

(19 citation statements)

References 33 publications

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“…It is worth mentioning that MB as a cationic dye is dissociated in the aqueous solutions as Dye þ Cl À (Liu et al 2010), which can be adsorbed on the membrane surface of negative charge. The pristine PEI membrane and the coated membrane by fluorine compounds present a negative surface charge (Liu et al 2018;Santos et al 2019), which can adsorb MB due to electrostatic attraction. A similar trend of MB adsorption on the surface of the PEI membrane coated by polydimethylsiloxane (PDMS) was reported in our previous work (Mousavi et al 2021).…”

Section: Agmd Of the Mb Solution And Fouling Studymentioning

confidence: 99%

Modification of porous polyetherimide hollow fiber membrane by dip-coating of Zonyl® BA for membrane distillation of dyeing wastewater

Mousavi

Aboosadi

Mansourizadeh

et al. 2021

Water Science and Technology

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Wetting and fouling have significantly affected the application of membrane distillation (MD). In this work, a dip-coating method was used for improving surface hydrophobicity of the polyetherimide (PEI) hollow fiber membrane. An air gap membrane distillation (AGMD) process was applied for treatment of the methylene blue (MB) solution. The porous PEI membrane was fabricated by a dry-wet spinning process and the hydrophobic 2-(Perfluoroalkyl) ethanol (Zonyl® BA) was used as the coating material. From FESEM, the modified PEI-Zonyl membrane showed an open structure with large finger-like cavities. The modified membrane displayed a narrow pore size distribution with mean pore size of 0.028 μm. The outer surface contact angle of the PEI-Zonly membrane increased from 81.3° to 100.4° due to the formation of an ultra-thin coated layer. The pure water flux of the PEI-Zonyl membrane was slightly reduced compared to the pristine PEI membrane. The permeate flux of 6.5 kg/m2 h and MB rejection of 98% was found for the PEI-Zonyl membrane during 76 h of the AGMD operation. Adsorption of MB on the membrane surface was confirmed based on the Langmuir isotherm evaluation, AFM and FESM analysis. The modified PEI-Zonyl membrane can be a favorable alternative for AGMD of dyeing wastewaters.

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Section: Agmd Of the Mb Solution And Fouling Studymentioning

confidence: 99%

Modification of porous polyetherimide hollow fiber membrane by dip-coating of Zonyl® BA for membrane distillation of dyeing wastewater

Mousavi

Aboosadi

Mansourizadeh

et al. 2021

Water Science and Technology

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show abstract

“…The fouled membrane displayed a greater number of positive values, had a pzc at pH 3.6, maintained negative values of -5 mV until pH 7, and became increasingly negative until -20 mV at pH 9.1. The greater number of positive values were due to the adsorption of foulants on the membrane surface [45]. Fouled membranes cleaned with water had zeta potential values similar to those of the fouled membrane until pH 7, and slightly increased negative values towards -11 mV at pH 9.3.…”

Section: Resultsmentioning

confidence: 91%

Tangential streaming potential, transmembrane flux, and chemical cleaning of ultrafiltration membranes

Arkhangelsky

Bazarbayeva

Kamal

et al. 2021

Separation and Purification Technology

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“…The adsorption mechanism mainly including electrostatic attraction, hydrophobic interaction, and hydrogen bonding is elaborated as follows . Generally, PVDF membrane surface shows negative zeta potential . The amide groups of VB12 (Scheme ) molecules easily combine with the surface sites with negative zeta potential.…”

Section: Resultsmentioning

confidence: 99%

Poly(vinylidene fluoride) membranes fabricated by vapor‐induced phase separation (VIPS) for the adsorption removal of VB12 from aqueous solution

Wang

Huang

Chen

et al. 2019

J of Applied Polymer Sci

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Poly(vinylidene fluoride) (PVDF) membranes without any additives were fabricated by a vapor-induced phase separation method and applied to the adsorption separation of vitamin B12 (VB12) from aqueous solution. The effects of preparation conditions including PVDF concentration in dope, vapor humidity, and exposure time on the morphologies, mechanical strength, adsorption, and permeation performances are investigated in detail. The results indicate that the PVDF membranes have a uniform spongy structure without macrovoids. The lower polymer concentration, relatively higher humidity, and longer exposure time easily leads to the formation of larger polymer nodules in the membrane matrix and lower mechanical strength of membranes. The resulted PVDF membranes exhibit superior separation efficiency for both static and dynamic adsorption for VB12. In the ultrafiltration (adsorption)-regeneration cycles, the permeation flux remains above 2500 L m −2 h −1 bar −1 and the VB12 removal ratio is above 92% after six cycles. The prepared PVDF membranes show superior adsorption capacities to other traditional adsorbents (such as activated carbons, nanoclay, etc.) for VB12 removal.

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Streaming potential for identification of foulants adsorption on PVDF membrane surface

Cited by 27 publications

References 33 publications

Modification of porous polyetherimide hollow fiber membrane by dip-coating of Zonyl® BA for membrane distillation of dyeing wastewater

Modification of porous polyetherimide hollow fiber membrane by dip-coating of Zonyl® BA for membrane distillation of dyeing wastewater

Tangential streaming potential, transmembrane flux, and chemical cleaning of ultrafiltration membranes

Poly(vinylidene fluoride) membranes fabricated by vapor‐induced phase separation (VIPS) for the adsorption removal of VB12 from aqueous solution

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