Magnetic induced asymmetric membrane: Effect of magnetic pattern to phenol removal by adsorption

In this work, effluent wastewater treated by using cyclopentane-water Clathrate system to treat water contaminates with phenols at concentrations (300, 250, 200, 150, 100 and 50) ppm in order to investigate the capability of process performance. Clathrate or hydrate are strong crystal structures including water (host particles) and little particles (guest particles). The experiments were conducted at different cyclopentane-water volume ratios (1: 2 and 1: 4). The work was done in a 250 ml glass cell with an electric mixer at a constant speed of 280 cycles per minute. Phenol was highest removal percent at 300ppm at 1: 4volume ratio was (92.3%), while the lowest concentration at 50 ppm and 1: 2volume ratio was (55%). Yield and Enrich factor had the highest values at the lowest concentration 50ppm and 1:2 volume ratio were (85% and 2.42) respectively. The technique of the Clathrate proved that it has a high capacity in the separation and achieve high removal percentage compared to other methods at standard conditions when the pressure of 1 atmosphere and temperature higher than the degree of freezing water and less economic costs compared to other methods.

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Faculty Opinions recommendation of aPKC-mediated phosphorylation regulates asymmetric membrane localization of the cell fate determinant Numb.

Faculty Opinions – Post-Publication Peer Review of the Biomedical Literature ◽

10.3410/f.1067045.520021 ◽

2007 ◽

Author(s):

Salim Abdelilah-Seyfried

Keyword(s):

Cell Fate ◽

Membrane Localization ◽

Asymmetric Membrane ◽

Cell Fate Determinant

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Shear Loss Characteristics of an Aerobic Biofilm

Water Science & Technology ◽

10.2166/wst.1992.0439 ◽

1992 ◽

Vol 26 (3-4) ◽

pp. 595-600 ◽

Cited By ~ 10

Author(s):

S. M. Rao Bhamidimarri ◽

T. T. See

Keyword(s):

Growth Rate ◽

Shear Stress ◽

Film Thickness ◽

Removal Rate ◽

Surface Growth ◽

Phenol Removal ◽

Concentric Cylinder ◽

Substrate Utilisation ◽

Utilisation Rate ◽

Net Growth Rate

Growth and shear loss characteristics of phenol utilizing biofilm were studied in a concentric cylinder bioreactor. The net accumulation of the biofilm and the substrate utilisation were measured as a function of torque. Uniform biofilms were obtained up to a thickness of around 300 microns, beyond which the surface growth was non-uniform. The substrate utilisation rate, however, reached a constant value beyond film thickness of 50 to 100 microns depending on the operational torque. The maximum phenol removal rate was achieved at a shear stress of 3.5 Nm-2. The effect of shear stress on net growth rate was found to be described byand a zero net growth was obtained at a shear stress of 18.7 Nm-2.

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Accelerated Phenol Removal by Amplifying the Metabolic Pathway with a Recombinant Plasmid Encoding Catechol 2, 3 Oxygenase

Water Science & Technology ◽

10.2166/wst.1992.0694 ◽

1992 ◽

Vol 26 (9-11) ◽

pp. 2191-2194 ◽

Cited By ~ 3

Author(s):

M. Fujita ◽

M. Ike ◽

T. Kamiya

Keyword(s):

Metabolic Pathway ◽

Recombinant Plasmid ◽

Removal Rate ◽

Phenol Degradation ◽

Wild Strain ◽

Phenol Concentration ◽

Phenol Removal

The metabolic pathway of the phenol degradation in Pseudomonasputida BH was amplified by introducing the recombinant plasmid containing catechol 2,3 oxygenase gene isolated fron the chromosome of BH. This strain could degrade phenol and grow much faster than the wild strain at the phenol concentration of 100mg/L. This strain seems to accelerate the phenol removal rate if it is applied to the treatment of wastewater containing phenol.

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Surface Proteins of the Erythrocyte Membrane Effect of Aging

Vox Sanguinis ◽

10.1111/j.1423-0410.1974.tb02660.x ◽

1974 ◽

Vol 26 (1) ◽

pp. 1-13 ◽

Cited By ~ 7

Author(s):

Michael J. Conrad ◽

John T. Penniston

Keyword(s):

Erythrocyte Membrane ◽

Surface Proteins ◽

Membrane Effect

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Influence of Chemical Osmosis on Solute Transport and Fluid Velocity in Clay Soils

Open Chemistry ◽

10.1515/chem-2020-0026 ◽

2020 ◽

Vol 18 (1) ◽

pp. 232-238

Author(s):

Zhihong Zhang ◽

Gailei Tian ◽

Lin Han

Keyword(s):

Solute Transport ◽

Transport Model ◽

Fluid Velocity ◽

Diffusion Mechanism ◽

Clay Material ◽

Chemical Osmosis ◽

Advection Diffusion Equation ◽

Test Study ◽

Proposed Model ◽

Membrane Effect

AbstractSolute transport through the clay liner is a significant process in many waste landfills or unmanaged landfills. At present, researchers mainly focus on the test study about semi-membrane property of clay material, however, the influence of chemical osmosis caused by membrane effect on solute transport and fluid velocity is insufficient. In this investigation, based on the classical advection-diffusion equation, a one-dimensional solute transport model for low-permeable clay material has been proposed, in which the coupled fluid velocity related with hydraulic gradient and concentration gradient is introduced, and the semi-membrane effect is embodied in the diffusion mechanism. The influence of chemical osmosis on fluid velocity and solute transport has been analyzed using COMSOL Multiphysics software. The simulated results show that chemical osmosis has a significant retarded action on fluid velocity and pollutant transport. The proposed model can effectively reveal the change in process of coupled fluid velocity under dual gradient and solute transport, which can provide a theoretical guidance for similar fluid movement in engineering.

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Calixresorcin[4]arene-Mediated Transport of Pb(II) Ions Through Polymer Inclusion Membrane

Membranes ◽

10.3390/membranes11040285 ◽

2021 ◽

Vol 11 (4) ◽

pp. 285

Author(s):

Joanna Konczyk ◽

Wojciech Ciesielski

Keyword(s):

Activation Energy ◽

Transport Process ◽

Optimal Conditions ◽

Inclusion Membrane ◽

Polymer Inclusion Membrane ◽

Membrane Effect ◽

Feed Phase ◽

Ion Carrier ◽

Feed Effect ◽

Nitrate Solutions

A facilitated transport of Pb(II) through polymer inclusion membrane (PIM) containing 1,8,15,22-tetra(1-heptyl)-calixresorcin[4]arene and its tetra- and octasubstituted derivatives containing phosphoryl, thiophosphoryl or ester groups as an ion carrier was investigated. The efficiency of Pb(II) removal from aqueous nitrate solutions was considered as a function of the composition of membrane (effect of polymer, plasticizer, and carrier), feed (effect of initial metal concentration and presence of other metal ions) and stripping phases, and temperature of the process conducting. Two kinetic models were applied for the transport description. The highest Pb(II) ions removal efficiency was obtained for the membrane with tetrathiophosphorylated heptyl-calixresorcin[4]arene as an ion carrier. The activation energy value, found from Eyring plot to be equal 38.7 ± 1.3 kJ/mol, suggests that the transport process is controllable both by diffusion and chemical reaction. The competitive transport of Pb(II) over Zn(II), Cd(II), and Cr(III) ions across PIMs under the optimal conditions was also performed. It was found that the Cr(III) ions’ presence in the feed phase disturb effective re-extraction of Pb(II) ions from membrane to stripping phase. Better stability of PIM-type than SLM-type membrane was found.

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Continued exploration of trifunctional alkyl 4-chloro-2-diazo-3-oxobutanoates: streamlined entry into [1,2,3]triazolo[5,1-c][1,4]benzoxazines and [1,2,3]triazolo[5,1-c][1,4]benzoxazepines

Synthesis ◽

10.1055/a-1348-9031 ◽

2021 ◽

Author(s):

Anton V. Budeev ◽

Grigory Kantin ◽

Dmitrii Viktorovich Dar'in ◽

Mikhail Krasavin

Keyword(s):

Medicinal Chemistry ◽

Phenol Removal ◽

Protecting Group

Further exploration of the trifunctional character of previously introduced alkyl 4-chloro-2-diazo-3-oxobutanoates in reactions with N-protected substituted o-aminophenols followed by deprotection provided a convenient entry into [1,2,3]triazolo[5,1-c][1,4]benzoxazines which are of high medicinal importance as documented in the literature. The same approach applied to N-protected substituted o-(aminomethyl)phenols afforded [1,2,3]triazolo[5,1-c][1,4]benzoxazepines which are practically unexplored from medicinal chemistry perspective. The syntheses start with SN2-type alkylation of the phenol. Removal of the protecting group triggered an imine formation followed by the Wolff 1,2,3-triazole synthesis.

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