Interlaced CNT Electrodes for Bacterial Fouling Reduction of Microfiltration Membranes

2017 ◽  
Vol 51 (16) ◽  
pp. 9176-9183 ◽  
Author(s):  
Qiaoying Zhang ◽  
Paula Arribas ◽  
E. Marielle Remillard ◽  
M. Carmen García-Payo ◽  
Mohamed Khayet ◽  
...  
Keyword(s):  
Microfiltration Membranes ◽  
Fouling Reduction ◽  
Bacterial Fouling

Polyelectrolyte and Silver Nanoparticle Modification of Microfiltration Membranes To Mitigate Organic and Bacterial Fouling

2012 ◽  
Vol 46 (7) ◽  
pp. 4025-4033 ◽  
Author(s):  
Fatou Diagne ◽  
Ramamoorthy Malaisamy ◽  
Vic Boddie ◽  
R. David Holbrook ◽  
Broderick Eribo ◽  
...  
Keyword(s):  
Silver Nanoparticle ◽  
Microfiltration Membranes ◽  
Bacterial Fouling

scholarly journals Groundwater Remediation of Volatile Organic Compounds Using Nanofiltration and Reverse Osmosis Membranes—A Field Study

Membranes ◽  
2021 ◽  
Vol 11 (1) ◽  
pp. 61
Author(s):  
Thomas J. Ainscough ◽  
Darren L. Oatley-Radcliffe ◽  
Andrew R. Barron
Keyword(s):  
Reverse Osmosis ◽  
Groundwater Remediation ◽  
Operating Pressure ◽  
Significant Extent ◽  
Groundwater Samples ◽  
Volatile Organic ◽  
Microfiltration Membranes ◽  
The Subject ◽  
A Site ◽  
Initial Results

Groundwater contamination by chlorinated hydrocarbons represents a particularly difficult separation to achieve and very little is published on the subject. In this paper, we explore the potential for the removal of chlorinated volatile and non-volatile organics from a site in Bedfordshire UK. The compounds of interest include trichloroethylene (TCE), tetrachloroethylene (PCE), cis-1,2-dichloroethylene (DCE), 2,2-dichloropropane (DCP) and vinyl chloride (VC). The separations were first tested in the laboratory. Microfiltration membranes were of no use in this separation. Nanofiltration membranes performed well and rejections of 70–93% were observed for synthetic solutions and up to 100% for real groundwater samples. Site trials were limited by space and power availability, which resulted in a maximum operating pressure of only 3 bar. Under these conditions, the nanofiltration membrane removed organic materials, but failed to remove VOCs to any significant extent. Initial results with a reverse osmosis membrane were positive, with 93% removal of the VOCs. However, subsequent samples taken demonstrated little removal. Several hypotheses were presented to explain this behavior and the most likely cause of the issue was fouling leading to adsorption of the VOCs onto the membrane and allowing passage through the membrane matrix.

scholarly journals Surface Adsorption of the Cancer Biomarker Lysophosphatidic Acid in Serum Studied by Acoustic Wave Biosensor

Materials ◽  
2021 ◽  
Vol 14 (15) ◽  
pp. 4158
Author(s):  
Brian De La Franier ◽  
Michael Thompson
Keyword(s):  
Acoustic Wave ◽  
Lysophosphatidic Acid ◽  
Electrode Surface ◽  
Biological Fluids ◽  
Thiol Group ◽  
Cancer Biomarker ◽  
Specific Adsorption ◽  
Shear Mode ◽  
Serum Samples ◽  
Fouling Reduction

The thickness shear mode acoustic wave device is of interest for the sensing of biomarkers for diseases in various biological fluids, but suffers from the issue of non-specific adsorption of compounds other than those of interest to the electrode surface, thus affecting the device’s output. The aim of this present study was to determine the level of non-specific adsorption on gold electrodes from serum samples with added ovarian cancer biomarker lysophosphatidic acid in the presence of a surface anti-fouling layer. The latter was an oligoethylene molecule with thiol group for attachment to the electrode surface. It was found that the anti-fouling layer had a minimal effect on the level of both adsorption of components from serum and the marker. This result stands in sharp contrast to the analogous monolayer employed for anti-fouling reduction on silica.

scholarly journals Recuperative Amino Acids Separation through Cellulose Derivative Membranes with Microporous Polypropylene Fiber Matrix

Membranes ◽  
2021 ◽  
Vol 11 (6) ◽  
pp. 429
Author(s):  
Aurelia Cristina Nechifor ◽  
Andreia Pîrțac ◽  
Paul Constantin Albu ◽  
Alexandra Raluca Grosu ◽  
Florina Dumitru ◽  
...  
Keyword(s):  
Amino Acids ◽  
Cellulose Acetate ◽  
Polypropylene Fiber ◽  
Point Of View ◽  
Hydroxyethyl Cellulose ◽  
Separation Performance ◽  
Thermal Gravimetric Analyzer ◽  
Microfiltration Membranes ◽  
Ft Ir ◽  
Structural Point

The separation, concentration and transport of the amino acids through membranes have been continuously developed due to the multitude of interest amino acids of interest and the sources from which they must be recovered. At the same time, the types of membranes used in the sepa-ration of the amino acids are the most diverse: liquids, ion exchangers, inorganic, polymeric or composites. This paper addresses the recuperative separation of three amino acids (alanine, phe-nylalanine, and methionine) using membranes from cellulosic derivatives in polypropylene ma-trix. The microfiltration membranes (polypropylene hollow fibers) were impregnated with solu-tions of some cellulosic derivatives: cellulose acetate, 2-hydroxyethyl-cellulose, methyl 2-hydroxyethyl-celluloseand sodium carboxymethyl-cellulose. The obtained membranes were characterized in terms of the separation performance of the amino acids considered (retention, flux, and selectivity) and from a morphological and structural point of view: scanning electron microscopy (SEM), high resolution SEM (HR-SEM), Fourier transform infrared spectroscopy (FT-IR), energy dispersive spectroscopy (EDS) and thermal gravimetric analyzer (TGA). The re-sults obtained show that phenylalanine has the highest fluxes through all four types of mem-branes, followed by methionine and alanine. Of the four kinds of membrane, the most suitable for recuperative separation of the considered amino acids are those based on cellulose acetate and methyl 2-hydroxyethyl-cellulose.

Alginate fouling reduction of functionalized carbon nanotube blended cellulose acetate membrane in forward osmosis

Chemosphere ◽  
2015 ◽  
Vol 136 ◽  
pp. 204-210 ◽  
Author(s):  
Hyeon-gyu Choi ◽  
Moon Son ◽  
SangHyeon Yoon ◽  
Evrim Celik ◽  
Seoktae Kang ◽  
...  
Keyword(s):  
Carbon Nanotube ◽  
Cellulose Acetate ◽  
Forward Osmosis ◽  
Cellulose Acetate Membrane ◽  
Functionalized Carbon Nanotube ◽  
Fouling Reduction

PBAT-based Microfiltration Membranes Using Porogen Saturated Solutions: Architecture, Morphology, and Environmental Profile

2021 ◽  
Author(s):  
Sueli Aparecida de Oliveira ◽  
Paulo Henrique Camani ◽  
Rennan Felix da Silva Barbosa ◽  
Daniel Belchior Rocha ◽  
Sushanta K. Mitra ◽  
...  
Keyword(s):  
Environmental Profile ◽  
Microfiltration Membranes ◽  
Saturated Solutions

scholarly journals Functional Modification of Cellulose Acetate Microfiltration Membranes by Supercritical Solvent Impregnation

Molecules ◽  
2021 ◽  
Vol 26 (2) ◽  
pp. 411
Author(s):  
Irena Zizovic ◽  
Marcin Tyrka ◽  
Konrad Matyja ◽  
Ivana Moric ◽  
Lidija Senerovic ◽  
...  
Keyword(s):  
Cellulose Acetate ◽  
Ion Beam ◽  
Antibacterial Properties ◽  
Cross Flow ◽  
Batch Mode ◽  
Impregnation Process ◽  
Supercritical Solvent ◽  
Cross Flow Filtration ◽  
Microfiltration Membranes ◽  
The Impact

This study investigates the modification of commercial cellulose acetate microfiltration membranes by supercritical solvent impregnation with thymol to provide them with antibacterial properties. The impregnation process was conducted in a batch mode, and the effect of pressure and processing time on thymol loading was followed. The impact of the modification on the membrane’s microstructure was analyzed using scanning electron and ion-beam microscopy, and membranes’ functionality was tested in a cross-flow filtration system. The antibiofilm properties of the obtained materials were studied against Staphyloccocus aureus and Pseudomonas aeruginosa, while membranes’ blocking in contact with bacteria was examined for S. aureus and Escherichia coli. The results revealed a fast impregnation process with high thymol loadings achievable after just 0.5 h at 15 MPa and 20 MPa. The presence of 20% of thymol provided strong antibiofilm properties against the tested strains without affecting the membrane’s functionality. The study showed that these strong antibacterial properties could be implemented to the commercial membranes’ defined polymeric structure in a short and environmentally friendly process.

Sign in / Sign up

Export Citation Format

Share Document