Newly developed nanofiltration membrane blended with mesoporous silica with low transmembrane pressure and excellent anti-fouling performance

Commercial nanofiltration membranes of different molecular weight cut-offs were tested on a pilot plant for the exploration of permeation nature of Ca, Mg, Mn, Fe, Na and ammonium ions. Correlation of transmembrane pressure and rejection quotient versus volumetric flux efficiency on nanofiltration membrane rejection and permeability behavior toward hydrated divalent and monovalent ions separation from the natural groundwater was observed. Membrane ion rejection affinity (MIRA) dimension was established as normalized TMP with regard to permeate solute moiety representing pressure value necessary for solute rejection change of 1%. Ion rejection coefficient (IRC) was introduced to evaluate the membrane rejection capability, and to indicate the prevailed nanofiltration partitioning mechanism near the membrane surface. Positive values of the IRC indicated satisfactory rejection efficiency of the membrane process and its negative values ensigned very low rejection affinity and high permeability of the membranes for the individual solutes. The TMP quotient and the efficiency of rejection for individual cations showed upward and downward trends along with flux utilization increase. Nanofiltration process was observed as an equilibrium. The higher the Gibbs free energy was, cation rejection was more exothermic and valuably enlarged. Low Gibbs free energy values circumferentially closer to endothermic zone indicated expressed ions permeation.

Download Full-text

Partial dealcoholization of red wine by nanofiltration and its effect on anthocyanin and resveratrol levels

Food Science and Technology International ◽

10.1177/1082013216642331 ◽

2016 ◽

Vol 22 (8) ◽

pp. 677-687 ◽

Cited By ~ 7

Author(s):

Szilvia Banvolgyi ◽

K Savaş Bahçeci ◽

Gyula Vatai ◽

Sandor Bekassy ◽

Erika Bekassy-Molnar

Keyword(s):

Low Temperature ◽

Factorial Design ◽

Red Wine ◽

Sensory Attributes ◽

Transmembrane Pressure ◽

Nanofiltration Membrane ◽

Permeate Flux ◽

Alcohol Content ◽

Membrane Performance ◽

Low Alcohol

The present work studies the use of nanofiltration for the production of red wine concentrate with low alcohol content. Factorial design was applied to measure the influences of transmembrane pressure (10–20 bar) and temperature (20–40 ℃) on the retention of valuable components such as anthocyanins and resveratrol, and on the nanofiltration membrane performance. The highest retention of anthocyanin and resveratrol was achieved at low temperature (20 ℃), while the high transmembrane pressure (20 bar) was found to increase the permeate flux considerably. The experiments demonstrated that nanofiltration appears as a valid technique for the production of low alcohol content red wine concentrate. Reduction of volume by a factor of 4, leads to 2.5–3 times more anthocyanins and resveratrol in the wine concentrates. The final new wine products – obtained by using various forms of reconstitution of the concentrated wine – had low alcohol content (4–6 % by volume) and their sensory attributes were similar to those of the original wine.

Download Full-text

Effects of ordered mesoporous silica on the performances of composite nanofiltration membrane

Desalination ◽

10.1016/j.desal.2013.08.002 ◽

2013 ◽

Vol 327 ◽

pp. 24-31 ◽

Cited By ~ 18

Author(s):

Qiang Li ◽

Zhaokui Li ◽

Hui Yu ◽

Xianhui Pan ◽

Xuliang Wang ◽

...

Keyword(s):

Mesoporous Silica ◽

Nanofiltration Membrane ◽

Ordered Mesoporous Silica ◽

Ordered Mesoporous

Download Full-text

Simulation of the nanofiltration of pulping black liquor by dynamic blade cross-flow with membrane

BioResources ◽

10.15376/biores.15.3.5593-5615 ◽

2020 ◽

Vol 15 (3) ◽

pp. 5593-5615

Author(s):

Wenjie Zhao ◽

Zhongyu Du ◽

Ning Kuang ◽

Hao Wang ◽

Benliang Yu ◽

...

Keyword(s):

Rotation Speed ◽

Lignin Content ◽

Dynamic Pressure ◽

Membrane Surface ◽

Black Liquor ◽

Tangential Velocity ◽

Cross Flow ◽

Transmembrane Pressure ◽

Nanofiltration Membrane ◽

Fluent Software

This paper investigated the filtration of black liquor with blade cross-flow by membrane. The lignin content in black liquid filtered by the nanofiltration membrane (NP010) is high under the transmembrane pressure of 0.5 bar, 1 bar, 1.5 bar, and 2 bar at 300 rpm and 800 rpm. In this regard, the tangential velocity on the nanofiltration membrane surface and the pressure variation on the blade in the process of filtration are simulated and analyzed with Fluent software. The tangential flow velocity on the nanofiltration membrane surface and the dynamic pressure on the blade, as well as the law of change under different rotation speed and transmembrane pressure are obtained. The comparison between experimental and simulated results have validated the numerical model of the filtration of black liquid by the blade dynamic cross-flow. According to the experimental and simulated results, the optimized filtration conditions are obtained when the blade dynamic cross-flow uses 1 kDa nanofiltration membrane to filter black liquor.

Download Full-text

Synthesis and Nanofiltration Membrane Performance of Oriented Mesoporous Silica Thin Films on Macroporous Supports

ACS Applied Materials & Interfaces ◽

10.1021/acsami.6b06765 ◽

2016 ◽

Vol 8 (33) ◽

pp. 21806-21815 ◽

Cited By ~ 21

Author(s):

M. Kaitlyn Clark Wooten ◽

Venkat R. Koganti ◽

Shanshan Zhou ◽

Stephen E. Rankin ◽

Barbara L. Knutson

Keyword(s):

Thin Films ◽

Mesoporous Silica ◽

Nanofiltration Membrane ◽

Membrane Performance ◽

Silica Thin Films

Download Full-text

Fabrication and performance of a polyethersulfone nanofiltration membrane impregnated with a mesoporous silica-poly(1-VInylpyrrolidone) nanocomposite

Polymer Composites ◽

10.1002/pc.23652 ◽

2015 ◽

Vol 38 (5) ◽

pp. 908-917 ◽

Cited By ~ 2

Author(s):

Jian Huang ◽

Zengnian Shu ◽

Yu Zhang

Keyword(s):

Mesoporous Silica ◽

Nanofiltration Membrane ◽

And Performance

Download Full-text

Portfolio of beetroot (Beta vulgaris L.) peel extracts concentrated by nanofiltration membrane

International Journal of Food Studies ◽

10.7455/ijfs/10.2.2021.a5 ◽

2021 ◽

Vol 10 (2) ◽

pp. 334-345

Author(s):

Moh Moh Zin ◽

Szilvia Bánvölgyi

Keyword(s):

Pure Water ◽

Scale Up ◽

Industrial Applications ◽

Spectrophotometric Analysis ◽

Industrial Wastes ◽

Transmembrane Pressure ◽

Nanofiltration Membrane ◽

Recirculation Flow ◽

Concentration Method

Membrane process is an intelligent alternative way of concentration, preferably for organic juices rich in thermolabile natural components. The expectation is to scale up the extraction of desired compounds from agro-industrial wastes through modernized concentration method. Recovery of betalains, phenolic, and antioxidant from beetroot peel extracts was accomplished by nanofiltration membrane (NF 200) at a recirculation flow rate (400 L h-1) and feed temperature (30 ºC) under constant transmembrane pressure (40 bar). Characterization of betaxanthin, betacyanin, phenolic, and antioxidant activity by spectrophotometric analysis revealed that the final samples contain these compounds respectively: 202.25±3.26 mg.L-1, 360.07±8.43 mg.L-1, 987.79±19.18 mg.L-1, 642.06±14.78 mg.L-1 (pure water); 206.62±1.37 mg.L-1, 339.72±2.89 mg.L-1, 972.72±47.49 mg.L-1, 745.97±25.45 mg.L-1 (ethanol-water). Final samples exhibit vivid colour and a considerably large amount of desired compounds compared to crude extracts and could have industrial applications.

Download Full-text

The Ceramic TiO2 Low-Pressure Nano-Filtration Membrane Separation Behavior for Single and Mixed Ion Salt Solutions

JORDANIAN JOURNAL OF ENGINEERING AND CHEMICAL INDUSTRIES (JJECI) ◽

10.48103/jjeci2112019 ◽

2019 ◽

Vol 2 (1) ◽

pp. 86-91

Author(s):

Banan Hudaib

Keyword(s):

Membrane Separation ◽

Transmembrane Pressure ◽

Separation Performance ◽

Nanofiltration Membrane ◽

Salt Solutions ◽

Tio2 Ceramic ◽

Filtration Membrane ◽

Nano Filtration ◽

Low Pressures ◽

Separation Behavior

The objective of this work is to study the separation performance of a tubular TiO2 ceramic nanofiltration membrane operate at low pressures (2 bar), and the parameters that would affect the membrane rejection behavior, such as the ions valences, ions type, transmembrane pressure (TMP) values, and membrane zeta-potential. The membrane was used to desalinate water samples containing NaCl, NaNO3, and Na2SO4 in single and tertiary salts solution. The rejection of ions solutions took the following trend: R of sulphate (SO4 2- ) > R of nitrate (NO3 1- )>R of chloride (Cl1- )>R of sodium (Na1+). The highest SO4 2- rejection was about 62%, the highest NO3 1- rejection was about 51%, the highest Cl1- rejection was about 42%, and highest Na1+ rejection was about 37%.

Download Full-text

Arsenate removal using a combination treatment of precipitation and nanofiltration

Water Science & Technology ◽

10.2166/wst.2012.833 ◽

2012 ◽

Vol 65 (2) ◽

pp. 296-302 ◽

Cited By ~ 2

Author(s):

F. F. Chang ◽

W. J. Liu

Keyword(s):

Isoelectric Point ◽

Combination Treatment ◽

Steric Hindrance ◽

Calcium Ion ◽

Membrane Separation ◽

Membrane Surface ◽

Transmembrane Pressure ◽

Electrostatic Repulsion ◽

Nanofiltration Membrane ◽

High Calcium

A combination treatment of Ca-precipitation and nanofiltration membrane was studied to remove arsenate from water. The selected nanofiltration membrane was an amphoteric charged membrane, proved by the results of ATR-FTIR spectra and zeta potential. The arsenate and calcium removal efficiencies had the lowest values at the isoelectric point of the nanofiltration membrane, attributed to the loosest steric hindrance and the weakest electrostatic repulsion. Above the isoelectric point, arsenate precipitated with calcium ion to form the low solubility compound calcium arsenate, while steric hindrance was the main mechanism of arsenate removal. In contrast, below the isoelectric point, the nanofiltration membrane with positive charges rejected calcium ion by electrostatic repulsion. The high electrostatic shielding of calcium ion prevented arsenate from coming close to the NF membrane. Either high feed arsenate concentration or high calcium oxide dose improved the removal amount of arsenate during the nanofiltration membrane separation process. In addition, the arsenate removal efficiency approached the highest value at 200 μg/L of feed arsenate concentration. The optimal transmembrane pressure was in a range of 0.5–0.7 MPa to restrict the formation of fouling cake on the nanofiltration membrane surface.

Download Full-text