Polyelectrolyte complex nanofiltration membranes by surface deposition of polyethylenimine on polyanion supports

2022 ◽  
pp. 52137
Author(s):  
Chenwei Li ◽  
Dujuan Hu ◽  
Ling Liu ◽  
Li Zhu ◽  
Man Xu ◽  
...  
Keyword(s):  
Polyelectrolyte Complex ◽  
Nanofiltration Membranes ◽  
Surface Deposition

Nanofiltration membranes consisting of quaternized polyelectrolyte complex nanoparticles for heavy metal removal

2019 ◽  
Vol 359 ◽  
pp. 994-1005 ◽  
Author(s):  
Chun-Chun Ye ◽  
Quan-Fu An ◽  
Jia-Kai Wu ◽  
Feng-Yang Zhao ◽  
Pei-Yao Zheng ◽  
...  
Keyword(s):  
Heavy Metal ◽  
Polyelectrolyte Complex ◽  
Metal Removal ◽  
Heavy Metal Removal ◽  
Nanofiltration Membranes

Polyelectrolyte complex nanofiltration membranes: performance modulation via casting solution pH

RSC Advances ◽  
2014 ◽  
Vol 4 (95) ◽  
pp. 52808-52814 ◽  
Author(s):  
Qiang Zhao ◽  
Yan-Li Ji ◽  
Jia-Kai Wu ◽  
Ling-Ling Shao ◽  
Quan-Fu An ◽  
...  
Keyword(s):  
Carboxymethyl Cellulose ◽  
Polyelectrolyte Complex ◽  
Sodium Carboxymethyl Cellulose ◽  
Trimethylammonium Chloride ◽  
Nanofiltration Membranes ◽  
Solution Ph ◽  
Casting Solution ◽  
Solution Processable

Nanofiltration (NF) membranes were prepared from a solution processable polyelectrolyte complex (PEC) between sodium carboxymethyl cellulose (CMCNa) and poly (2-methacryloyloxy ethyl trimethylammonium chloride) (PDMC).

Multilayered polyelectrolyte complex based solvent resistant nanofiltration membranes prepared from weak polyacids

2012 ◽  
Vol 394-395 ◽  
pp. 98-106 ◽  
Author(s):  
Pejman Ahmadiannamini ◽  
Xianfeng Li ◽  
Ward Goyens ◽  
Nithya Joseph ◽  
Boudewijn Meesschaert ◽  
...  
Keyword(s):  
Polyelectrolyte Complex ◽  
Nanofiltration Membranes

A novel type of polyelectrolyte complex/MWCNT hybrid nanofiltration membranes for water softening

2015 ◽  
Vol 492 ◽  
pp. 412-421 ◽  
Author(s):  
Feng-Yang Zhao ◽  
Quan-Fu An ◽  
Yan-Li Ji ◽  
Cong-Jie Gao
Keyword(s):  
Polyelectrolyte Complex ◽  
Water Softening ◽  
Nanofiltration Membranes

Investigation of the influence of contaminated fuel on turbine vane surface deposition

1980 ◽  
Author(s):  
D. NEALY ◽  
W. TIMMERMAN ◽  
A. COHN
Keyword(s):  
Surface Deposition ◽  
Turbine Vane

In situ Time-Resolved Small-Angle X-ray Scattering Reveals the Formation Kinetics of Polyelectrolyte Complex Micelles

2019 ◽  
Author(s):  
Hao Wu ◽  
Jeffrey Ting ◽  
Siqi Meng ◽  
Matthew Tirrell
Keyword(s):  
Small Angle ◽  
Self Assembly ◽  
Electrostatic Interactions ◽  
Polyelectrolyte Complex ◽  
Time Resolved ◽  
X Ray ◽  
X Ray Scattering ◽  
Kinetics Of ◽  
Ray Scattering

We have directly observed the <i>in situ</i> self-assembly kinetics of polyelectrolyte complex (PEC) micelles by synchrotron time-resolved small-angle X-ray scattering, equipped with a stopped-flow device that provides millisecond temporal resolution. This work has elucidated one general kinetic pathway for the process of PEC micelle formation, which provides useful physical insights for increasing our fundamental understanding of complexation and self-assembly dynamics driven by electrostatic interactions that occur on ultrafast timescales.

Innovative and sustainable concept of regeneration of decolorization ion exchange resins

2012 ◽  
pp. 381-384 ◽  
Author(s):  
M.A. Theoleyre ◽  
Anne Gonin ◽  
Dominique Paillat
Keyword(s):  
Ion Exchange ◽  
Water Requirement ◽  
Ion Exchange Resins ◽  
Salt Solutions ◽  
Nanofiltration Membranes ◽  
Industrial Efficiency ◽  
Salt Consumption ◽  
Multiple Effect ◽  
Exchange Resins

Regeneration of resins used for decolorization of sugar solutions is done with concentrated salt solutions. Nanofiltration membranes have been proven effective, in terms of industrial efficiency in decreasing salt consumption. More than 90% of the salt that is necessary for regeneration can be recycled through a combination of direct recycling of intermediate eluates, the separation of colored compounds by use of very selective nanofiltration membranes and a multiple-effect evaporation of salty permeates. The desalted color compound solution is sent to the molasses, limiting considerably the effluent to be treated. Starting from a liquor of 800 IU, the water requirement is limited to less than 100 L/t of sugar and the amount of wastewater can be reduced to less than 40 L/t of sugar.

Innovative concepts of regeneration of decolorization ion exchange resins in sugar refineries

2016 ◽  
pp. 377-380
Author(s):  
Marc André Théoleyre ◽  
Anne Gonin ◽  
Dominique Paillat
Keyword(s):  
Ion Exchange ◽  
Reverse Osmosis ◽  
Energy Supply ◽  
Ion Exchange Resins ◽  
Salt Solutions ◽  
Nanofiltration Membranes ◽  
Local Conditions ◽  
Salt Consumption ◽  
Multiple Effect ◽  
Exchange Resins

Regeneration of resins used for decolorization of sugar solutions is done with concentrated salt solutions. Nanofiltration membranes have been proven effective, in terms of industrial efficiency in decreasing salt consumption. More than 90% of the salt that is necessary for regeneration can be recycled through a combination of direct recycling of intermediate eluates, the separation of colored compounds by use of very selective nanofiltration membranes and a system to concentrate salty permeates. According to specific local conditions on energy supply and cost, the concentration of salty permeates can be either a multiple effect evaporator or a combination of electrodialysis and reverse osmosis. The desalted color compound solution is sent to the molasses, limiting considerably the effluent to be treated. Starting from a liquor of 800 IU, the water requirement is limited to less than 100 L/t of sugar and the amount of wastewater can be reduced to less than 40 L/t of sugar.

Effect of operating conditions on rejection of anionic pollutants in the water environment by nanofiltration especially in very low pressure range

1996 ◽  
Vol 34 (9) ◽  
pp. 149-156 ◽  
Author(s):  
C. Ratanatamskul ◽  
K. Yamamoto ◽  
T. Urase ◽  
S. Ohgaki
Keyword(s):  
Water Environment ◽  
Chloride Ions ◽  
Operating Conditions ◽  
Transmembrane Pressure ◽  
Operating Pressure ◽  
Nanofiltration Membranes ◽  
Single Solution ◽  
Crossflow Velocity ◽  
Membrane Type ◽  
New Generation

The recent development of new generation LPRO or nanofiltration membranes have received attraction for application in the field of wastewater and water treatment through an increasingly stringent regulation for drinking purpose and water reclamation. In this research, the application on treatment of anionic pollutants (nitrate, nitrite, phosphate, sulfate and chloride ions) have been investigated as functions of transmembrane pressure, crossflow velocity and temperature under very much lower pressure operation range (0.49 to 0.03 MPa) than any other previous research used to do. Negative rejection was also observed under very much low range of operating pressure in the case of membrane type NTR-7250. Moreover, the extended Nernst-Planck model was used for analysis of the experimental data of the rejection of nitrate, nitrite and chloride ions in single solution by considering effective charged density of the membranes.

Ceramic Ultra- and Nanofiltration Membranes for Oilfield Produced Water Treatment: A Mini Review

2007 ◽  
Vol 1 (1) ◽  
pp. 1-8 ◽  
Author(s):  
K. Shams Ashaghi ◽  
M. Ebrahimi ◽  
P. Czermak
Keyword(s):  
Water Treatment ◽  
Produced Water ◽  
Nanofiltration Membranes ◽  
Produced Water Treatment ◽  
Oilfield Produced Water
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