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

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.

scholarly journals Fabrication and Assessment of ZnO Modified Polyethersulfone Membranes for Fouling Reduction of Bovine Serum Albumin

2017 ◽  
Vol 2017 ◽  
pp. 1-8 ◽  
Author(s):  
Tshepo Duncan Dipheko ◽  
Kgabo Philemon Matabola ◽  
Kate Kotlhao ◽  
Richard M. Moutloali ◽  
Michael Klink
Keyword(s):  
Bovine Serum Albumin ◽  
Serum Albumin ◽  
Zno Nanoparticles ◽  
Bovine Serum ◽  
Pure Water ◽  
Water Flux ◽  
Composite Membranes ◽  
Optimal Performance ◽  
Fouling Resistance ◽  
Pure Water Flux

ZnO/PES composite membranes were fabricated by phase inversion method using DMAc as a solvent. The structure of ZnO was investigated using TEM, SEM, XRD, and TGA. TEM images of ZnO nanoparticles were well-defined, small, and spherically shaped with agglomerated nanoparticles particles of 50 nm. The SEM and XRD results were an indication that ZnO nanoparticles were present in the prepared ZnO/PES composites membranes. Contact angle measurements were used to investigate surface structures of the composite membranes. The amount of ZnO nanoparticles on PES membranes was varied to obtain the optimal performance of the composite membranes in terms of pure water flux, flux recovery, and fouling resistance using the protein bovine serum albumin (BSA) as a model organic foulant. The results showed that addition of ZnO to PES membranes improved the hydrophilicity, permeation, and fouling resistance properties of the membranes. Pure water flux increased from a low of 250 L/m2h for the neat membrane to a high of 410 L/m2h for the composite membranes. A high flux recovery of 80–94% was obtained for the composite membranes. The optimal performance of the composite membranes was obtained at 1.5 wt% of ZnO.

Fouling Characterization of Polysulfone-Grafted-Methyl Methacrylate Membrane

2013 ◽  
Vol 465-466 ◽  
pp. 819-823 ◽  
Author(s):  
Muhamad Zaini Yunos ◽  
Zawati Harun ◽  
Hatijah Basri ◽  
Hariati Taib ◽  
Ahmad Fauzi Ismail
Keyword(s):  
Bovine Serum Albumin ◽  
Serum Albumin ◽  
Methyl Methacrylate ◽  
Bovine Serum ◽  
Pure Water ◽  
Water Flux ◽  
Optimum Time ◽  
Membrane Performance ◽  
Pure Water Flux

This study investigates the effects of different grafting time on the polysulfone grafted methyl methacrylate (PSf-g-MMA) membrane performance. PSf-g-MMA was successfully prepared via UV radiation method. Methyl methacrylate (MMA) and benzophenon (BP) were used as a monomer and initiator respectively. Membrane performances were measured based on permeation and rejection of bovine serum albumin (BSA). Degree of grafting was found to increase as grafting time increases and the optimum time was found at 100 minutes. The results revealed that the pure water flux and rejection were significantly improved with the addition of grafting time. The present of MMA also were found to improve fouling properties of the membrane.

Effect of pH on Bovine Serum Albumin (BSA) Solution to Polysulfone-based Membrane

2014 ◽  
Vol 70 (2) ◽  
Author(s):  
Nurul Nabilah Aminudin ◽  
Hatijah Basri ◽  
Muhammad Zaini Yunos ◽  
Zawati Harun ◽  
Goh Pei Sean
Keyword(s):  
Bovine Serum Albumin ◽  
Serum Albumin ◽  
Bovine Serum ◽  
Pure Water ◽  
Water Flux ◽  
Membrane Performance ◽  
Phase Inversion Technique ◽  
Decreasing Ph ◽  
Flat Sheet Membrane ◽  
Bsa Rejection

In this work, polysulfone (PSf) flat sheet membrane was prepared via phase inversion technique. The effects of polyethylene glycol (PEG) additive on membrane performance were observed and investigated. The membrane permeation was evaluated in terms of pure water flux (PWF) and solute rejection at different pHs (pH 3, pH 5, pH 7 and pH 9). Bovine serum albumin (BSA) solution was used to study the performance of the prepared membrane. Results showed that the increase of PEG concentration led to higher PWF. This is due to PEG role as a pore forming agent in casting solution. The PWF was found to increase up to 101.85 LMH at 5% PEG. However, the PWF decrease when the PEG concentration is increased up to 7% and 9%. Similarly, flux rate at different pH showed the same plot as PWF. At pH 9, the PWF is high compared to pH 3, pH 5 and pH 7. The BSA rejection data at pH 3 and pH 5 shows the high rejection compared to pH 7 and pH 9. No significant changes were observed when PEG concentration was increased. As a conclusion, the addition of PEG has improved the performance of membrane in terms of PWF at a certain percentage (with the highest was given at 5%) of PSf membrane. It is also evidenced that the % of BSA rejection increased with decreasing pH.

scholarly journals Grafting Thin Layered Graphene Oxide onto the Surface of Nonwoven/PVDF-PAA Composite Membrane for Efficient Dye and Macromolecule Separations

Nanomaterials ◽  
2020 ◽  
Vol 10 (4) ◽  
pp. 792
Author(s):  
Febri Baskoro ◽  
Selvaraj Rajesh Kumar ◽  
Shingjiang Jessie Lue
Keyword(s):  
Graphene Oxide ◽  
Folic Acid ◽  
Methyl Orange ◽  
Bovine Serum Albumin ◽  
Serum Albumin ◽  
Composite Membrane ◽  
Polyacrylic Acid ◽  
Bovine Serum ◽  
Polyvinylidene Fluoride ◽  
Oxide Composite

This study investigates the permeance and rejection efficiencies of different dyes (Rhodamine B and methyl orange), folic acid and a protein (bovine serum albumin) using graphene oxide composite membrane. The ultrathin separation layer of graphene oxide (thickness of 380 nm) was successfully deposited onto porous polyvinylidene fluoride-polyacrylic acid intermediate layer on nonwoven support layer using vacuum filtration. The graphene oxide addition in the composite membrane caused an increased hydrophilicity and negative surface charge than those of the membrane without graphene oxide. In the filtration process using a graphene oxide composite membrane, the permeance values of pure water, dyes, folic acid and bovine serum albumin molecules were more severely decreased (by two orders of magnitude) than those of the nonwoven/polyvinylidene fluoride-polyacrylic acid composite membrane. However, the rejection efficiency of the graphene oxide composite was significantly improved in cationic Rhodamine B (from 9% to 80.3%) and anionic methyl orange (from 28.3% to 86.6%) feed solutions. The folic acid and bovine serum albumin were nearly completely rejected from solutions using either nonwoven/polyvinylidene fluoride-polyacrylic acid or nonwoven/polyvinylidene fluoride-polyacrylic acid/graphene oxide composite membrane, but the latter possessed anti-fouling property against the protein molecules. The separation mechanism in nonwoven/polyvinylidene fluoride-polyacrylic acid membrane includes the Donnan exclusion effect (for smaller-than-pore-size solutes) and sieving mechanism (for larger solutes). The sieving mechanism governs the filtration behavior in the nonwoven/polyvinylidene fluoride-polyacrylic acid/graphene oxide composite membrane.

Adsorption of the Polyvinylidene Fluoride-Based Metal Affinity Membrane towards Bovine Serum Albumin

2015 ◽  
Vol 1083 ◽  
pp. 3-8
Author(s):  
Xiu Li Wang ◽  
Fan Zhang
Keyword(s):  
Bovine Serum Albumin ◽  
Serum Albumin ◽  
Bovine Serum ◽  
Polyvinylidene Fluoride ◽  
Metal Affinity ◽  
Adsorption Performance ◽  
Affinity Membrane ◽  
Affinity Membranes

Three kinds of polyvinylidene fluoride (PVDF)-based immobilized metal affinity membranes (IMAM), namely, Cu (II)-IMAM, Co (II)-IMAM and Ni (II)-IMAM were prepared to recover bovine serum albumin (BSA) from the solutions. Adsorption of the aforementioned membranes towards BSA were studied with the presence of Ca (II) and PO43–. The adsorption performance of the membranes followed the order of Co (II)-IMAM > Cu (II)-IMAM > Ni (II)-IMAM. The existent PO43– exhibited a larger interference on BSA uptake than Ca (II).

Bradykinin-induced elevations of hydraulic conductivity display spatial and temporal variations in frog capillaries

1993 ◽  
Vol 264 (5) ◽  
pp. H1575-H1581 ◽  
Author(s):  
D. A. Williams ◽  
V. H. Huxley
Keyword(s):  
Hydraulic Conductivity ◽  
Bovine Serum Albumin ◽  
Serum Albumin ◽  
Bovine Serum ◽  
Water Flux ◽  
Temporal Variations ◽  
Time Dependent ◽  
Microvascular Networks ◽  
Microvascular Network

Bradykinin, a vasodilator, increases permeability to macromolecules in postcapillary venules. Recent studies indicate that vasodilators elevate water flux from frog mesenteric capillaries. Thus we hypothesized that bradykinin would also increase transcapillary water flux. Arteriolar (ac), true (tc), and venular (vc) capillaries were identified within the microvascular network of frog mesentery. Each capillary was cannulated in situ and perfused with control (frog Ringer and 10 mg/ml bovine serum albumin) and then bradykinin test (10(-7) M) solutions. Hydraulic conductivity (Lp) increased across the network (1.8, 5.3, and 11.0 x 10(-7) cm.s-1.cmH2O-1 for ac, tc, and vc, respectively). Bradykinin test Lp normalized to control (LpBKN/LPC) was elevated threefold (n = 37). Lp for ac (n = 12) was elevated 3.5-fold and oscillated with time. Lp for tc (n = 13) increased fivefold within the first 5 min of exposure and then dropped. Lp for vc (n = 12) was not different from control. Location- and time-dependent responses of Lp indicate that capillaries forming microvascular networks have individual responses to bradykinin.

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