scholarly journals (Polyphenyl Sulfone - Polyether Sulfone) Blending to Performance Flat Sheet Membrane to Remove Some Heavy and Radioactive Elements from Phosphogypsum Waste

2021 ◽  
Vol 39 (3A) ◽  
pp. 382-393
Author(s):  
Waleed T. Rashid ◽  
Israa A. Alkadir ◽  
Moayyed G. Jalhoom ◽  
Khalid T. Rashid
Keyword(s):  
Membrane Properties ◽  
Inversion Method ◽  
Operating Pressure ◽  
Radioactive Elements ◽  
Flat Sheet ◽  
Polyether Sulfone ◽  
Flat Sheet Membrane ◽  
Phase Inversion Method ◽  
Phosphogypsum Waste ◽  
Sheet Membrane

In this research, the traditional version of the phase inversion method was used to fabricate a flat sheet of a blended membrane. The method was involved using a polymer that blends polyether sulfone (PES) varied proportions (0,3,4 and 5 wt.%), and polyphenyl sulfone (PPSU) was 20wt%. It was found that with the addition of PES, the membrane properties increased, the best properties were with 4%wt. The ratio was chosen PES 4wt% to study the effect of time, temperature, and pressure on the rejection of heavy and radioactive elements.  The increase in the porosity was with the addition of 4% PES. The rejection of heavy and radioactive elements for thUF membrane increases with increasing of the operating pressure and time. While by increasing the temperature, the rejection of heavy and radioactive elements for thUF membrane decreased. The rejection of K, Th, and Pb are higher than other elements, the order of the rejection is K˃Th˃Pb˃U˃Cd˃Zn˃Cu>Ni.

Blood compatibility of two different types of membrane oxygenator during cardiopulmonary bypass in infants

1994 ◽  
Vol 17 (10) ◽  
pp. 543-548 ◽  
Author(s):  
Y.J. Gu ◽  
P.W. Boonstra ◽  
C. Akkerman ◽  
H. Mungroop ◽  
I. Tigchelaar ◽  
...  
Keyword(s):  
Cardiopulmonary Bypass ◽  
Blood Compatibility ◽  
Hollow Fibre ◽  
Membrane Oxygenator ◽  
Hollow Fibre Membrane ◽  
Flat Sheet ◽  
Fibre Membrane ◽  
Membrane Oxygenators ◽  
Flat Sheet Membrane ◽  
Sheet Membrane

The contact of blood with the artificial extracorporeal circuit causes a systemic inflammatory response due to blood activation. In this study, we compared two different paediatric membrane oxygenators used for extracorporeal circulation: a hollow fibre membrane oxygenator (Dideco Masterflo D-701, n=10), and a flat sheet silicone membrane oxygenator (Avecor Kolobow 800-2A, n=10). Blood compatibility was indicated by measuring complement activation as well as leukocyte and platelet activation. In patients perfused with a flat sheet membrane oxygenator, concentrations of complement split products C3a were significantly increased 30 minutes after the start of bypass (p<0.01), whereas only a mild increase of C3a was found in patients perfused with a hollow fibre membrane oxygenator. Leukocyte and platelet counts dropped uniformly in both groups after the start of bypass mainly due to hemodilution. Activation of leukocytes and platelets identified by both plasma β-glucuronidase and β-thromboglobulin was similar in both groups. Infants perfused with a flat sheet membrane oxygenator received significantly more donor blood than those perfused with a hollow fibre oxygenator (p<0.05). These results indicate that when used during paediatric cardiopulmonary bypass, a flat sheet membrane oxygenator has a higher complement activity than a hollow fibre membrane oxygenator, which is probably due to the relatively larger blood-surface contacting area of the oxygenator.

Enzyme-immobilized flat-sheet membrane contactor for green carbon capture

2021 ◽  
pp. 129587
Author(s):  
Hannaneh Rasouli ◽  
Ion Iliuta ◽  
Francis Bougie ◽  
Alain Garnier ◽  
Maria C. Iliuta
Keyword(s):  
Carbon Capture ◽  
Membrane Contactor ◽  
Flat Sheet ◽  
Flat Sheet Membrane ◽  
Sheet Membrane

Hollow Fiber Microfiltration and Ultrafiltration Products for High Purity Water Treatment Applications

2001 ◽  
Author(s):  
Randal M. Wenthold
Keyword(s):  
Water Treatment ◽  
Medical Device ◽  
Hollow Fiber ◽  
High Purity ◽  
Large Scale ◽  
Flat Sheet ◽  
Fiber Technology ◽  
Flat Sheet Membrane ◽  
Sheet Membrane ◽  
Filtration Device

Abstract For years in the semiconductor inductor industry the only choice individuals had for microfiltration or ultrafiltration devices consisted of flat sheet membrane manufactured into spiral wound or pleated filtration products. Polysulfone hollow fiber technology has evolved in the medical device industry for use as the highest purity type filtration device available. This unique technology is now available for use in the semiconductor business segment as well with product offerings that may be used in laboratory to large-scale applications.

scholarly journals Extraction of Glucose by Supported Liquid Membrane using Polyethersulfone Flat Sheet Membrane Support

2017 ◽  
Vol 20 (1) ◽  
Author(s):  
S. S. Teng ◽  
N. Harruddin ◽  
Syed M. Saufi
Keyword(s):  
Aqueous Solution ◽  
Liquid Membrane ◽  
Supported Liquid Membrane ◽  
Biomass Hydrolysis ◽  
Flat Sheet ◽  
Inhibitory Compounds ◽  
Biomass Resources ◽  
Extraction Performance ◽  
Flat Sheet Membrane ◽  
Sheet Membrane

Sugar is released during biomass hydrolysis together with unwanted inhibitory compounds such as acetic acid, furfural and hydromethylfurfural. The extraction of particular sugar prior to fermentation process is needed in order to increase the yield of biofuel generated from biomass resources. In the current study, glucose was extracted from the aqueous solution using supported liquid membrane (SLM) system. Polyethersulfone (PES) flat sheet membrane support was fabricated using 15 wt.% PES, 42.5 wt.% DMAc and 42.5 wt.% PEG 200. Liquid membrane was formulated using 2-ethyl hexanol and methyl cholate as solvent and carrier, respectively. The effect of several parameters involved in SLM system such as type of diluent and flowrate of feed and stripping phase on the extraction performance of glucose were studied. About 52.77% of glucose was successfully extracted from aqueous solution using SLM system with 0.01M of methyl cholate in 2-ethyl hexanol. Using simulated biomass hydrolysate solution, almost 54.55% of glucose and 51.08% of xylose were successfully extracted using the SLM system.

scholarly journals Effect of DEA in Membrane Gas Absorption System Using Polymeric Flat Sheet Membrane

2017 ◽  
Vol 8 (1) ◽  
Author(s):  
A. L. Ahmad ◽  
A. R. Sunarti ◽  
K. T. Lee ◽  
W. J. N. Fernando
Keyword(s):  
Room Temperature ◽  
Liquid Flow Rate ◽  
Polymeric Membranes ◽  
Gas Absorption ◽  
Absorption System ◽  
Flat Sheet ◽  
Flat Sheet Membrane ◽  
Carbon Dioxide Co2 ◽  
Sheet Membrane ◽  
Gas Ratio

The objective of this study was to investigate the potential process of the removal of carbon dioxide (CO2) from flue gases by using developed membrane gas absorption system. The experiments were performed in membrane gas absorption system consisted 0.45 μm pore size microporous polyvinylidenefluoride (PVDF) flat sheet membrane. Diethanolamine (DEA) solution was employed as the liquid absorbent. The operating parameters such as the gas and liquid flow rate were setup at 100 cm3/min and 25 cm3/min and liquid absorbent was at room temperature. The effect of DEA concentration was studied with variation in range 1 M to 5 M. In addition, the experiments were carried out with 20%, 40% and 100% gas ratio CO2 to N2. The results show that hydrophobic polymeric membranes such as PVDF can be efficiently used for gas absorption with optimized concentration of DEA.

Sign in / Sign up

Export Citation Format

Share Document