Flux-enhanced reduced graphene oxide (rGO)/PVDF nanofibrous membrane distillation membranes for the removal of boron from geothermal water

Eryıldız, Bahriye; Ozbey‐Unal, Bahar; Gezmis-Yavuz, Elifnur; Köseoğlu-İmer, Derya Y.; Keskinler, Bülent; Koyuncu, İsmail

doi:10.1016/j.seppur.2021.119058

Cited by 32 publications

(17 citation statements)

References 34 publications

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“…Table 7 shows the permeate water characterization for P1 and M1 membranes in the AGMD system. Consequently, permeate boron concentrations of less than 2.4 mg/L, the World Health Organization's (WHO) standard value for drinking water, and even less than 1 mg/L, the limit for irrigation water, have been discovered 26 …”

Section: Resultsmentioning

confidence: 99%

“…This real geothermal wastewater contains 60 mg B/L. The detailed characterization can refer to our previous study 26 . All feed solutions contents are given in Table 3.…”

Section: Methodsmentioning

confidence: 99%

“…Superhydrophobic membrane fabrication is carried out on many polymers such as polyvinylidene fluoride (PVDF), polytetrafluoroethylene (PTFE), polypropylene (PP), poly(vinylidene fluoride‐co‐hexafluoropropylene) (PVDF‐HFP) and polysulfone (PS) 18–22 . Furthermore, in order to improve hydrophobicity additives such as titanium dioxide (TiO 2 ), reduced graphene oxide, graphene oxide, and silica nanoparticles, are added in solution 23–26 …”

Section: Introductionmentioning

confidence: 99%

“…They reported that 0.039 wt% rGO had the highest contact angle (124.5°), Young's modulus (143.2 mPa), and LEP value (69.7 kPa). Also, this rGO/PVDF membrane showed the highest permeate water flux, salt rejection, and lowest boron concentration in permeate when compared to neat PVDF membrane 26 . Ozbey‐Unal et al fabricated PVDF nanofibrous electrospun membranes with varied ratios of PTFE micro powder.…”

Section: Introductionmentioning

confidence: 99%

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Development of robust superhydrophobic PFA/TMI/PVDF membrane by electrospinning/electrospraying techniques for air gap membrane distillation

Eryıldız

Ozbey‐Unal

Menceloǵlu

et al. 2023

J of Applied Polymer Sci

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In this present study, the fabrication of electrospun nanofiber membranes with various hydrophobic polymers containing varying ratios of TMI & PFA (a, a-dimethyl meta-isopropenylbenzyl isocyanate-perfluoroalkoxy alkane) and styrene or polyacrylonitrile (PAN) was conducted to enhance air gap membrane distillation (AGMD) performance. Electrospinning and electrospraying were combined to fabricate an electrospun nanofiber membrane. Different membrane properties such as contact angle, thickness, liquid entry pressure (LEP) and mechanical strength were examined for the evaluation of nanofiber membranes. The performance of fabricated electrospun membranes was examined in AGMD application for 2 h using 0.1 wt% NaCl solution. Then, the optimized membrane was further tested for 2 h using synthetic and real geothermal water. Results demonstrated that a fabricated membrane with 20 wt% TMI & PFA and 80 wt% styrene increased the contact angle to 154.8 and the LEP to 77.6 kPa. The salt rejection was 99.7% and permeate water boron concentration was 0.108 mg B/L for modified membrane (M1) compared with 98.01% and 0.305 mg B/L for pure PVDF membrane. These results indicate that this superhydrophobic membrane, fabricated by a combined electrospin/electrospray technique, shows high promise for MD applications.

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Section: Resultsmentioning

confidence: 99%

“…This real geothermal wastewater contains 60 mg B/L. The detailed characterization can refer to our previous study 26 . All feed solutions contents are given in Table 3.…”

Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Development of robust superhydrophobic PFA/TMI/PVDF membrane by electrospinning/electrospraying techniques for air gap membrane distillation

Eryıldız

Ozbey‐Unal

Menceloǵlu

et al. 2023

J of Applied Polymer Sci

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“…18 Upon reviewing the literature, different polymers are used in the fabrication of braid reinforced hollow fiber membranes. These polymers are polyvinylidene fluoride (PVDF), 19,20 polyacrylonitrile (PAN), 9 cellulose acetate (CA), 21 poly (vinyl chloride) (PVC), 7 polysulfone (PSf), 22 polyurethane (PU), 23 and poly (m-phenylene isophthalamide) (PMIA). 24 The PSf polymer was utilized as a polymer to prepare a braid reinforced hollow fiber membrane.…”

Section: Introductionmentioning

confidence: 99%

Development of braid reinforced hollow fiber membranes as both ultrafiltration and nanofiltration membranes: Effect of pore forming additive on structure and performance

Tuncay

Keskin

Türken

et al. 2022

J of Applied Polymer Sci

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Hollow fiber membranes have higher surface area and are easy to be applied in systems. Because of theirs self‐supporting construction, they have limited mechanical durability. By reinforcing these membranes with a braid, the mechanical strength can be improved. In this study, the impact of polyvinyl pyrrolidone (PVP) as a pore‐forming additive with different contents on the fabrication of polysulfone braid reinforced hollow fiber membranes was investigated both as a ultrafiltration membrane and as a support for the fabrication of thin film composite (TFC) nanofiltration membranes. Characterization and filtration studies of all membranes were performed to examine membrane performance. It was discovered that the porosity and hydrophilicity of the ultrafiltration membranes were enhanced by enhancing PVP concentration, thus increasing the pure water flux in the membranes. As regards to results of fabricated TFC membranes, salt rejections were increased with increasing PVP ratios. The rejection efficiency of magnesium sulfate and sodium chloride was found to be approximately 80% and 49%, respectively, when a PVP ratio of 8% was used.

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Hybrid membrane processes equipped with crystallization unit for a simultaneous recovery of freshwater and minerals from saline wastewater

Mpala,

Chimanlal,

Richards

et al. 2024

Development in Wastewater Treatment Research and Processes

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Flux-enhanced reduced graphene oxide (rGO)/PVDF nanofibrous membrane distillation membranes for the removal of boron from geothermal water

Cited by 32 publications

References 34 publications

Development of robust superhydrophobic PFA/TMI/PVDF membrane by electrospinning/electrospraying techniques for air gap membrane distillation

Development of robust superhydrophobic PFA/TMI/PVDF membrane by electrospinning/electrospraying techniques for air gap membrane distillation

Development of braid reinforced hollow fiber membranes as both ultrafiltration and nanofiltration membranes: Effect of pore forming additive on structure and performance

Hybrid membrane processes equipped with crystallization unit for a simultaneous recovery of freshwater and minerals from saline wastewater

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