Detection of reverse osmosis membrane fouling with silica, bovine serum albumin and their mixture using in-situ electrical impedance spectroscopy

Poly(2-hydroxyethyl methacrylate)–bovine serum albumin core–corona particles were prepared using in situ activators generated by electron transfer for atom transfer radical polymerizations of HEMA initiated by a BSA macroinitiator.

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Experimental verification on stability analysis of supported-liquid-membrane separation of metal ions by in-situ electrical impedance spectroscopy

Journal of the Taiwan Institute of Chemical Engineers ◽

10.1016/j.jtice.2021.09.011 ◽

2021 ◽

Author(s):

Chi Hieu Nguyen ◽

Thi Tuong Van Tran ◽

Wei-Chin Huang ◽

Ruey-Shin Juang

Keyword(s):

Stability Analysis ◽

Impedance Spectroscopy ◽

Metal Ions ◽

Experimental Verification ◽

Electrical Impedance ◽

Liquid Membrane ◽

Membrane Separation ◽

Electrical Impedance Spectroscopy ◽

Separation Of Metal Ions

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Preparation, characterization and dyeing wastewater treatment of a new PVDF/PMMA five-bore UF membrane with β-cyclodextrin and additive combinations

Water Science & Technology ◽

10.2166/wst.2021.104 ◽

2021 ◽

Author(s):

Xiaozheng Bian ◽

Jianping Huang ◽

Lin Qiu ◽

Chunyan Ma ◽

Danli Xi

Keyword(s):

Wastewater Treatment ◽

Bovine Serum Albumin ◽

Serum Albumin ◽

Membrane Fouling ◽

Bovine Serum ◽

Polyvinylidene Fluoride ◽

Hollow Fiber Membrane ◽

Pure Water ◽

Water Flux ◽

Dyeing Wastewater

Abstract A new type of polyvinylidene fluoride (PVDF)/polymethyl methacrylate (PMMA) hollow fiber membrane (HFM) with five bores was prepared. The effects of Polyvinylpyrrolidone (PVP), β-cyclodextrine (β-CD), Polyethylene Glycol (PEG) and Polysorbate 80 (Tween 80) and their combinations on the PVDF/PMMA five-bore HFMs were investigated. The performance and fouling characteristics of five-bore HFMs for dyeing wastewater treatment were evaluated. Results indicated that adding 5wt.% PVP could increase the porosity and water flux of the membrane but decrease the bovine serum albumin (BSA) rejection rate. Adding 5wt.% β-CD significantly improved the tensile and rejection of the HFMs without showing effect on the increase of water flux. The characteristic of the HFMs with different additives combinations proved that the mixture of 5wt.% PVP and 1wt.% β-CD obtained the best membrane performance, with a pure water flux of 427.9 L/ m2·h, a contact angle of 25°, and a rejection to bovine serum albumin (BSA) of 89.7%. The CODcr and UV254 removal rates of dyeing wastewater treatment were 61.10% and 50.41%, respectively. No breakage or leakage points were found after 120d operation showing the reliable mechanical properties. We set the operating flux to 55 L/m2·h and cross flow rate to 10% which can effectively control membrane fouling.

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Fabrication of a Novel Antifouling Polysulfone Membrane with in Situ Embedment of Mxene Nanosheets

International Journal of Environmental Research and Public Health ◽

10.3390/ijerph16234659 ◽

2019 ◽

Vol 16 (23) ◽

pp. 4659 ◽

Cited By ~ 4

Author(s):

Zhen Shen ◽

Wei Chen ◽

Hang Xu ◽

Wen Yang ◽

Qing Kong ◽

...

Keyword(s):

Contact Angle ◽

Bovine Serum Albumin ◽

Serum Albumin ◽

Water Contact Angle ◽

Bovine Serum ◽

Composite Membranes ◽

Recovery Ratio ◽

Water Contact ◽

Polysulfone Membrane

Membrane fouling is still a critical issue for the application of ultrafiltration, which has been widely used in water treatment due to its efficiency and simplicity. In order to improve the antifouling property, a new 2D material MXene was used to fabricate composite ultrafiltration membrane with the approach of in situ embedment during the phase inversion process in this study. Scanning electron microscopy (SEM), atomic force microscopy (AFM), thermogravimetric analysis (TGA), energy dispersive spectroscopy (EDS), Fourier transform infrared spectroscopy (FTIR), water contact angle, bovine serum albumin rejection and porosity measurements were utilized to characterize the prepared membranes. Due to the hydrophilicity of the MXene, the composite membranes obtained higher hydrophilicity, confirmed by the decreased water contact angle. All the modified membranes had a high bovine serum albumin rejection above 90% while that of the pristine polysulfone membrane was 77.48%. The flux recovery ratio and the reversible fouling ratio of the membranes were also improved along with the increasing content of the MXene. Furthermore, the highest flux recovery ratio could also reach 76.1%. These indicated the good antifouling properties of MXene composite membranes. The enhanced water permeability and protein rejection and excellent antifouling properties make MXene a promising material for antifouling membrane modification.

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