Modeling the separation performance of nanofiltration membranes for the mixed salts solution

2006 ◽  
Vol 280 (1-2) ◽  
pp. 734-743 ◽  
Author(s):  
Da-Xin Wang ◽  
Xiao-Lin Wang ◽  
Yasuhiro Tomi ◽  
Masaaki Ando ◽  
Takuji Shintani
Keyword(s):  
Separation Performance ◽  
Nanofiltration Membranes ◽  
Mixed Salts

Modeling the separation performance of nanofiltration membranes for the mixed salts solution with Mg2+ and Ca2+

2006 ◽  
Vol 284 (1-2) ◽  
pp. 384-392 ◽  
Author(s):  
Da-Xin Wang ◽  
Ling Wu ◽  
Zhuo-Dan Liao ◽  
Xiao-Lin Wang ◽  
Yasuhiro Tomi ◽  
...  
Keyword(s):  
Separation Performance ◽  
Nanofiltration Membranes ◽  
Mixed Salts

Preparation and Co (II) Removal of ZnO/Poly-Piperazineamide Nanofiltration Membranes

2017 ◽  
Author(s):  
Xiaoguang Zhang ◽  
Xuexing Chen ◽  
Qingchun Chen ◽  
Zhaolong Deng ◽  
Yan Liu ◽  
...  
Keyword(s):  
Reaction Time ◽  
Monomer Concentration ◽  
Attenuated Total Reflection ◽  
Radioactive Nuclide ◽  
Separation Performance ◽  
Separation Mechanism ◽  
Nanofiltration Membranes ◽  
Terephthaloyl Chloride ◽  
Nano Zno ◽  
Zno Particles

A series of nanofiltration membranes were prepared by interfacial polymerization of piperazine and terephthaloyl chloride on the surface of polyacrylonitrile (PAN) ultrafiltration membranes. ZnO nanoparticles were incorporated in the active separation layer to modify the performances of the membranes. The preparation conditions as the monomer concentration, dosage of nano-ZnO particles and the reaction time on removal of a simulated radioactive nuclide Co (II) were investigated. Fourier transform infrared in attenuated total reflection mode verified the formation of polyamide on the PAN ultrafiltration membrane. The scanning electron microscope images showed that the nano-ZnO particles can homogeneously fixed on the membrane surface. The retention of Co (II) increased with increasing the dosage of nano-ZnO in the range of 0∼0.03 g. Further adding more nano-ZnO, the rejection rate of Co (II) first decreased and then increased. The concentration of piperazine and terephthaloyl chloride showed similar effect on removal of Co (II) ion. 5 minutes polymerization time was sufficient to form an active separation layer on the substrate membrane which changed the separation mechanism from ultrafiltration to nanofiltration. The separation performance of NF3 prepared by the following conditions was optimum: 0.03g nano-ZnO, 0.6 wt% piperazine, 0.5 wt% terephthaloyl chloride, and the reaction time was 15 min. The rejection rates of 1000 mg/L Na2SO4 and Co2+ in CoCl2 solution were 90% and 75% respectively. The Co (II) removal rate can be increased to nearly 90% by using ethylenediaminetetraacetic acid disodium salt. Increasing the operation pressure or the feeding concentration of Co (II) can also improve the performances of the membranes in this experiment.

Separation performance of polyimide nanofiltration membranes for solvent recovery from dewaxed lube oil filtrates

Desalination ◽  
2006 ◽  
Vol 191 (1-3) ◽  
pp. 254-261 ◽  
Author(s):  
Ying Kong ◽  
Deqing Shi ◽  
Hongwei Yu ◽  
Yunfang Wang ◽  
Jinrong Yang ◽  
...  
Keyword(s):  
Separation Performance ◽  
Solvent Recovery ◽  
Nanofiltration Membranes

scholarly journals The Preparation of High-Performance and Stable MXene Nanofiltration Membranes with MXene Embedded in the Organic Phase

Membranes ◽  
2021 ◽  
Vol 12 (1) ◽  
pp. 2
Author(s):  
Qiang Xue ◽  
Kaisong Zhang
Keyword(s):  
Aqueous Phase ◽  
Organic Phase ◽  
Negative Charge ◽  
Interfacial Polymerization ◽  
Water Immersion ◽  
Membrane Surface ◽  
Polymerization Reaction ◽  
Future Research ◽  
Separation Performance ◽  
Nanofiltration Membranes

Nanomaterials embedded in nanofiltration membranes have become a promising modification technology to improve separation performance. As a novel representation of two-dimensional (2D) nanomaterials, MXene has nice features with a strong negative charge and excellent hydrophilicity. Our previous research showed that MXene nanosheets were added in the aqueous phase, which enhanced the permeselectivity of the membrane and achieved persistent desalination performance. Embedding the nanomaterials into the polyamide layer through the organic phase can locate the nanomaterials on the upper surface of the polyamide layer, and also prevent the water layer around the hydrophilic nanomaterials from hindering the interfacial polymerization reaction. We supposed that if MXene nanosheets were added in the organic phase, MXene nanosheets would have more negative contact sites on the membrane surface and the crosslinking degree would increase. In this study, MXene were dispersed in the organic phase with the help of ultrasound, then MXene nanocomposite nanofiltration membranes were achieved. The prepared MXene membranes obtained enhanced negative charge and lower effective pore size. In the 28-day persistent desalination test, the Na2SO4 rejection of MXene membrane could reach 98.6%, which showed higher rejection compared with MXene embedded in aqueous phase. The results of a long-time water immersion test showed that MXene membrane could still maintain a high salt rejection after being soaked in water for up to 105 days, which indicated MXene on the membrane surface was stable. Besides MXene membrane showed high rejection for high-concentration brine and good mono/divalent salt separation performance in mono/divalent mixed salt solutions. As a part of the study of MXene in nanofiltration membranes, we hoped this research could provide a theoretical guidance for future research in screening different addition methods and different properties.

Anti-fouling polyethersulfone nanofiltration membranes aided by amine-functionalized boron nitride nanosheets with improved separation performance

2020 ◽  
Vol 8 (6) ◽  
pp. 104454 ◽  
Author(s):  
Vahid Vatanpour ◽  
Hamid Karimi ◽  
Siamak Imanian Ghazanlou ◽  
Yaghoub Mansourpanah ◽  
Mohammad Reza Ganjali ◽  
...  
Keyword(s):  
Boron Nitride ◽  
Separation Performance ◽  
Nanofiltration Membranes ◽  
Boron Nitride Nanosheets ◽  
Amine Functionalized

Separation performance of polyimide nanofiltration membranes for concentrating spiramycin extract

Desalination ◽  
2006 ◽  
Vol 191 (1-3) ◽  
pp. 309-317 ◽  
Author(s):  
Deqing Shi ◽  
Ying Kong ◽  
Jixian Yu ◽  
Yunfang Wang ◽  
Jinrong Yang
Keyword(s):  
Separation Performance ◽  
Nanofiltration Membranes

Influence of Cross-Linking and Process Parameters on the Separation Performance of Poly(dimethylsiloxane) Nanofiltration Membranes

2005 ◽  
Vol 44 (9) ◽  
pp. 3238-3248 ◽  
Author(s):  
John P. Robinson ◽  
E. Steve Tarleton ◽  
Katrin Ebert ◽  
Chris R. Millington ◽  
Arian Nijmeijer
Keyword(s):  
Process Parameters ◽  
Cross Linking ◽  
Separation Performance ◽  
Nanofiltration Membranes
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