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Articoli di riviste sul tema "Nanofiltration"

Autore: Grafiati

Pubblicato: 4 giugno 2021

Ultima modifica: 25 luglio 2025

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1

khan, Nida tabassum. "Nanofiltration-Concept and Prospects." Pharmaceutics and Pharmacology Research 4, no. 4 (2021): 01–04. http://dx.doi.org/10.31579/2693-7247/047.

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Nanofiltration is a pressure-driven film measure for fluid stage detachments. It is employed in numerous applications due to lower energy utilization and higher motion rates. The properties of nanofiltration membranes lie between those of non-permeable reverse osmosis layers and permeable ultrafiltration layers where partition is typically thought to be because of size rejection and, sometimes, charge impacts. The improvement of nanofiltration development as a practical association over continuous years has provoked a pivotal extension in its application in different endeavours, for instance,

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2

Ramli, Mohd Redzuan, Nik Meriam Nik Sulaiman, Mustafa Ali Mohd, and Mohamad Fairus Rabuni. "Performance of chlorination process during nanofiltration of sulfonamide antibiotic." Water Science and Technology 72, no. 9 (2015): 1611–20. http://dx.doi.org/10.2166/wst.2015.367.

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The effectiveness of combined nanofiltration and disinfection processes was studied by comparing the pre-disinfection and post-disinfection when in combination with nanofiltration. Four types of sulfonamide (sulfanilamide, sulfadiazine, sulfamethoxazole, and sulfadimethoxine) were chosen as substrates, with sodium hypochlorite as a disinfectant. A laboratory-scale nanofiltration system was used to conduct the following sets of experiment: (1) a pre-chlorination system, where the free active chlorine (FAC) was added to the membrane influent; and (2), a post-chlorination system, where the FAC wa

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3

Liu, Xi, and Wei Wang. "The Application of Nanofiltration Technology in Recovery of Ionic Liquids from Spinning Wastewater." Applied Mechanics and Materials 178-181 (May 2012): 499–502. http://dx.doi.org/10.4028/www.scientific.net/amm.178-181.499.

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In this paper, the effects of the concentration, temperature, and run-time of ionic liquids solution, on the rejection capacity of home-made hollow fiber composite nanofiltration membrane were studied. Then the nanofiltration membrane was used to the recover ionic liquids by concentrating spinning wastewater. The results shows that: The rejection rate of the composite nanofiltration membranes and its water fluxes lightly down with the concentration of ionic liquids increase; with running-time and temperature of ionic liquid solution increase, the rejection rate of the composite nanofiltration

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4

Liikanen, R., H. Kiuru, T. Tuhkanen, and M. Nyström. "Nanofiltration membrane fouling by conventionally treated surface water." Water Supply 3, no. 5-6 (2003): 183–90. http://dx.doi.org/10.2166/ws.2003.0165.

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Nanofiltration is a very effective technique for improving the removal of trace organics after a conventional chemical water treatment train. However, the fouling of the membranes decreases the applicability of the process, and thus, an understanding and control of membrane fouling are crucial for a more widespread use of nanofiltration in water treatment. The fouling of different nanofiltration membranes by pre-treated surface waters was investigated in a laboratory-scale filtration unit in this study. The results indicate that the traditional chemical treatment does not remove membrane foula

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5

Weng, Rengui, Guohong Chen, Xin He, et al. "The Performance of Cellulose Composite Membranes and Their Application in Drinking Water Treatment." Polymers 16, no. 2 (2024): 285. http://dx.doi.org/10.3390/polym16020285.

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Water scarcity and water pollution have become increasingly severe, and therefore, the purification of water resources has recently garnered increasing attention. Given its position as a major water resource, the efficient purification of drinking water is of crucial importance. In this study, we adopted a phase transition method to prepare ZrO2/BCM (bamboo cellulose membranes), after which we developed IP-ZrO2/BC-NFM (bamboo cellulose nanofiltration membranes) through interfacial polymerization using piperazine (PIP) and tricarbonyl chloride (TMC). Subsequently, we integrated these two membra

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6

Khramtsov, A. G., and V. N. Sergeev. "Technological breakthrough of the agrarian-and-food innovations in dairy case for example of universal agricultural raw materials. Nanofiltration." Agrarian-And-Food Innovations 12 (December 25, 2020): 7–19. http://dx.doi.org/10.31208/2618-7353-2020-12-7-19.

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Aim. Consideration nanofiltration as a process of membrane technology – directed and controlled filtration of whey through special semipermeable partitions (membrane filters) with a pore size of 1-5 nm, carried out at a pressure of 0.7-4.0 MPa with the release of particles with a molecular weight of 0.5-1.0 kDa. Discussion. Nanofiltration allows you to separate the whey as a system by the size of the components – microparticles and macromolecules. In this case, from pre – separated, processed by microfiltration and ultrafiltration of whey to nanoconcentrate (retentate) pass almost all the comp

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7

Inouye, Masaharu, and Thierry Burnouf. "The Role of Nanofiltration in the Pathogen Safety of Biologicals: An Update." Current Nanoscience 16, no. 3 (2020): 413–24. http://dx.doi.org/10.2174/1573413715666190328223130.

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Nanofiltration technology to remove possible pathogenic viruses during biopharmaceutical manufacturing was introduced in the biopharmaceutical industry in 1989. The very first industrial implementation took place in the early 1990s, through commercial manufacturing processes of plasma- derived medical products. Then it was applied to recombinant protein medical products, including monoclonal antibodies. In the first review published in 2005 in this journal, the technology was already considered promising and was much welcomed by the industry, but it was still a relatively emerging technology a

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8

Chang, F. F., and W. J. Liu. "Arsenate removal using a combination treatment of precipitation and nanofiltration." Water Science and Technology 65, no. 2 (2012): 296–302. http://dx.doi.org/10.2166/wst.2012.833.

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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 hindra

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9

Wang, Xin Miao, and Hai Yan Yang. "The Nanofiltration Technology of Metoprolol in the Water Environment." Advanced Materials Research 955-959 (June 2014): 1013–19. http://dx.doi.org/10.4028/www.scientific.net/amr.955-959.1013.

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Metoprolol (MET) is a common kind of Pharmaceuticals and personal care products (PPCPs), which belongs to a new type of organic micropollutants. And conventional water and wastewater treatment technology cannot remove the MET effectively, so it is necessary to adopt nanofiltration technology for advanced treatment. The influence factors on removal of Metoprolol (MET) in water by nanofiltration are mainly investigated in the study. According to the results, the removal rate of MET by nanofiltration all can reach more than 99% with the initial concentration increasing. Then the removal rate of M

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10

Liu, Qian Ying, Jun Rui Wu, Yi Ming Liu, and Ri Na Wu. "The Desalination Effect Comparison of Two Kinds of Nanofiltration Membrane." Applied Mechanics and Materials 508 (January 2014): 40–43. http://dx.doi.org/10.4028/www.scientific.net/amm.508.40.

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The desalination effect of two kinds of nanofiltration membrane, NF-1812-270 and NF-1812, were compared. Under the conditions of different pressure, made the comparison of the quotas between two different nanometer filtration membranes, including membrane flux, ash content, retention rate of chlorine, conductivity. The test results showed that the effect of desalination of NF-1812 nanofiltration membrane was better than the effect of desalination NF-1812-270 nanofiltration membrane.

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Boudin, Mathieu, Marco Bonafini, Tess van den Brande, and Ina Vanden Berghe. "Cross-Flow Nanofiltration of Contaminated Protein-Containing Material: State of the Art." Radiocarbon 59, no. 6 (2017): 1793–807. http://dx.doi.org/10.1017/rdc.2017.137.

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ABSTRACTRadiocarbon (14C) dating of protein-containing material (collagen, hair/wool, silk, leather) contaminated with extraneous carbon (e.g. humic substances) might result in unreliable dates when pretreated with the conventional but inadequate protocols. In this study cross-flow nanofiltration was applied to pretreated, protein-containing material. This method is able to remove low-molecular and high-molecular weight contaminants as demonstrated in previous studies. The sample quality improvement by cross-flow nanofiltration is verified by measuring the C:N ratio before and after nanofiltra

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12

Zeng, Xinyu, Chunchun Meng, Zihan Xu, Xinwu Li, Haochen Zhu, and Guangming Li. "Recent Advances on the Positively-Charged Nanofiltration Membranes for Mg2+/Li+ Separation Through Interfacial Polymerization." Nanomaterials 15, no. 13 (2025): 967. https://doi.org/10.3390/nano15130967.

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The rapid development of the global energy industry has driven an escalating worldwide demand for lithium resources. As a major lithium source, salt lake brines contain abundant divalent ions that hinder efficient lithium extraction. Compared with conventional lithium recovery technologies, nanofiltration membranes emerge as an energy-efficient and environmentally friendly alternative. Over the past decade, interfacial polymerization has been widely adopted to fabricate nanofiltration membranes for lithium–magnesium separation, with studies confirming the superior performance of positively cha

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13

Rezaei Hosseinabadi, S., K. Wyns, V. Meynen, et al. "Organic solvent nanofiltration with Grignard functionalised ceramic nanofiltration membranes." Journal of Membrane Science 454 (March 2014): 496–504. http://dx.doi.org/10.1016/j.memsci.2013.12.032.

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14

Ozaki, H., K. Sharma, W. Saktaywin, D. Wang, and Y. Yu. "Application of ultra low pressure reverse osmosis (ULPRO) membrane to water and wastewater." Water Science and Technology 42, no. 12 (2000): 123–35. http://dx.doi.org/10.2166/wst.2000.0255.

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There is a worldwide grave concern about water pollution control. To mitigate the water scarcity, in arid zones and in the areas with no other sources but brackish water, reverse osmosis technology has played an important role. In an effort to reduce the cost of energy requirement for RO operation, nanofiltration has been developed. Until recently the nanofiltration has been used in water softening and removal of disinfection byproduct (DBO). Use of nanofiltration to desalinate brackish water has been ruled out due to low rejection of salts. The introduction of ultra-low pressure reverse osmos

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15

dos Santos Cavaleiro, Rosely Maria, Tiago da Silva Arouche, Phelipe Seiichi Martins Tanoue, et al. "Hormones Nanofiltration in Carbon Nanotubes and Boron Nitride Nanotubes Using Uniform External Electric Field Through Molecular Dynamics." Journal of Nanoscience and Nanotechnology 21, no. 11 (2021): 5499–509. http://dx.doi.org/10.1166/jnn.2021.19467.

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Hormones are a dangerous group of molecules that can cause harm to humans. This study based on classical molecular dynamics proposes the nanofiltration of wastewater contaminated by hormones from a computer simulation study, in which the water and the hormone were filtered in two single-walled nanotube compositions. The calculations were carried out by changing the intensities of the electric field that acted as a force exerting pressure on the filtration along the nanotube, in the simulation time of 100 ps. The hormones studied were estrone, estradiol, estriol, progesterone, ethinylestradiol,

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16

Verberk, J. Q. J. C., J. Post, W. G. J. van der Meer, and J. C. van Dijk. "Direct capillary nanofiltration for ground water and surface water treatment." Water Supply 2, no. 5-6 (2002): 277–83. http://dx.doi.org/10.2166/ws.2002.0180.

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Capillary nanofiltration is a new concept in membrane filtration. This technique combines the advantages of the good water quality obtained from nanofiltration membranes with the easy hydraulic cleaning of capillary membranes. Direct capillary nanofiltration can be used to treat ground water or surface water without pre-treatment. At the Delft University of Technology several MSc-thesis projects have been carried out on this subject. This paper will describe some results of these studies. A model based on a mass balance to predict the flux of a capillary nanofiltration installation treating gr

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17

Yang, Qing, Xin Qiu, and Xiang Shen. "Concentration Polarization BP Model of Nanofiltration Separation." Advanced Materials Research 305 (July 2011): 247–50. http://dx.doi.org/10.4028/www.scientific.net/amr.305.247.

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In order to effectively control the influence of Concentration Polarization (CP) during the nanofiltration separating wastewater process, this study applied parameters characterization of membrane flux attenuation coefficient (mwt) and the Back-propagation (BP) neural network algorithm to simulate the development rules of CP and membrane pollution, set up CP BP Model of Nanofiltration Separation, based on the tested data of NF90. The correlation coefficient between simulation and test of the simulation BP model was over 0.99, with the absoluteness error below 1.5%. According to the model’s pre

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18

Porte, Pierre, Jean-Thierry Aubin, Samuel Arrabal, Christine Kimmel-Jehan, Sami Chtourou, and Benoit Flan. "Solvent-Detergent Treatment and Ion-Exchange Chromatography Have No Impact on Prion Removal by 15 nm Nanofiltration in the Manufacture of Factane®." Blood 106, no. 11 (2005): 4177. http://dx.doi.org/10.1182/blood.v106.11.4177.4177.

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Abstract The transmission risk for new variant Creutzfeldt-Jakob Disease by medicinal plasma-derived products (MPP) is considered as very low, even theoretical, as to date no cases associated with these products have been reported. As a precautionary measure, European Regulatory authorities require that manufacturers of MPP perform an assessment of their manufacturing processes capacity to remove transmissible spongiform encephalopathy (TSE) agents. In the absence of scientific data, manufacturers are required to perform specific studies demonstrating their processes efficacy towards prion rem

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19

Mu, Tao, Qiang Wang, Liang Cao, Xiaohang Zhu, and Zhiru Zhao. "Preparation and characterization of a novel emphatically charged strengthened chitosan composite nanofiltration membrane." MATEC Web of Conferences 358 (2022): 01025. http://dx.doi.org/10.1051/matecconf/202235801025.

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In this paper, chitosan was grafted with acrylic acid and positively charged elements, and a series of reinforced nanofiltration membranes were prepared by coating modified chitosan polymer with polysulfone ultrafiltration membrane as support. The structure of chitosan derivatives and polymers was characterized by infrared spectrum, and the membrane structure was characterized by scanning electron microscope and atomic force microscope. The performance of composite nanofiltration membrane was closely related to the structure of polymer and the electrical properties of positively charged elemen

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20

Povarova, N. "Influence of functional feeding of young chickens-browser of meat cross on meat quality and safety." Ukrainian Black Sea region agrarian science 112, no. 4 (2021): 78–88. http://dx.doi.org/10.31521/2313-092x/2021-4(112)-8.

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This article focuses on the study of the membrane concentration process using buttermilk ultrafiltration nanofiltration membranes. Two types of Vladipor OPMN nanofiltration membranes are being investigated in order to identify the main filtration dependencies. For each type, a pressure in the range of 0.5 to 2.0 MPa and a temperature of 20 to 40 ° C are applied. The results indicate that both types of membranes effectively retain lactose at a pressure of 2.0 MPa, a temperature of 40 ° C and a concentration factor. about 2. Varying the flow velocity above the membrane from 0.5 m / s to 1.5 m /

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21

Bondar, S., A. Trubnikova, O. Chabanova, T. Sharachmatova, and T. Nedobiichuk. "Application of nanofiltration for regulation of properties of secondary products of processing of animal raw materials." Ukrainian Black Sea region agrarian science 112, no. 4 (2021): 66–77. http://dx.doi.org/10.31521/2313-092x/2021-4(112)-7.

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This article focuses on the study of the membrane concentration process using buttermilk ultrafiltration nanofiltration membranes. Two types of Vladipor OPMN nanofiltration membranes are being investigated in order to identify the main filtration dependencies. For each type, a pressure in the range of 0.5 to 2.0 MPa and a temperature of 20 to 40 ° C are applied. The results indicate that both types of membranes effectively retain lactose at a pressure of 2.0 MPa, a temperature of 40 ° C and a concentration factor. about 2. Varying the flow velocity above the membrane from 0.5 m / s to 1.5 m /

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22

Wijaya, Hans, Kengo Sasaki, Prihardi Kahar, et al. "Concentration of Lipase from Aspergillus oryzae Expressing Fusarium heterosporum by Nanofiltration to Enhance Transesterification." Processes 8, no. 4 (2020): 450. http://dx.doi.org/10.3390/pr8040450.

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Nanofiltration membrane separation is an energy-saving technology that was used in this study to concentrate extracellular lipase and increase its total activity for biodiesel production. Lipase was produced by recombinant Aspergillus oryzae expressing Fusarium heterosporum lipase (FHL). A sulfonated polyethersulfone nanofiltration membrane, NTR-7410, with a molecular weight cut-off of 3 kDa was used for the separation, because recombinant lipase has a molecular weight of approximately 20 kDa, which differs from commercial lipase at around 30 kDa for CalleraTM Trans L (CalT). After concentrati

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23

Lazarev, Sergei, Dmitrii Protasov, Dmitrii Konovalov, Irina Khorokhorina, and Oleg Abonosimov. "Modeling of the Nanofiltration Process Based on Convective Diffusion Theory." Modelling 5, no. 4 (2024): 1729–44. http://dx.doi.org/10.3390/modelling5040090.

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The article formulates the state of the problem of improving the theoretical calculation of the nanofiltration kinetic characteristics in the time cycle of separation of industrial solutions containing copper(II), iron(III), trisodium phosphate and OP-10 (a wetting agent used in electroplating, a product of treating a mixture of mono- and dialkylphenols with ethylene oxide) using the equations of convective diffusion, hydrodynamics and mass transfer. To calculate the kinetic characteristics of the nanofiltration process, the mathematical model was improved by numerically solving the equations

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24

Mitko, Krzysztof, Ewa Laskowska, Marian Turek, Piotr Dydo, and Krzysztof Piotrowski. "Scaling Risk Assessment in Nanofiltration of Mine Waters." Membranes 10, no. 10 (2020): 288. http://dx.doi.org/10.3390/membranes10100288.

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Nanofiltration can be applied for the treatment of mine waters. One of the main problems is the risk of crystallization of sparingly soluble salts on the membrane surface (scaling). In this work, a series of batch-mode nanofiltration experiments of the mine waters was performed in a dead-end Sterlitech® HP 4750X Stirred Cell. Based on the laboratory results, the concentration profiles of individual ions along the membrane length in a single-pass industrial-scale nanofiltration (NF) unit was calculated, assuming the tanks-in-series flow model inside the membrane module. These calculations also

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Macedo, Antónia, Joana Monteiro, and Elizabeth Duarte. "A Contribution for the Valorisation of Sheep and Goat Cheese Whey through Nanofiltration." Membranes 8, no. 4 (2018): 114. http://dx.doi.org/10.3390/membranes8040114.

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The amount of cheese whey generated from the production of speciality sheep and goat cheese is significantly growing due to the acclaimed nutritional and medicinal benefits of the milk from these species. However, most of the cheese whey generated has no applications, thus giving rise to environmental problems. This work focuses on the study of the performance of the nanofiltration process for recovering the permeates of ultrafiltration from sheep and goat cheese whey. Nanofiltration experiments were carried out with membranes of nanofiltration (NF) in total recirculation and concentration mod

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Cornelissen, E. R., W. G. Siegers, J. Ogier, and E. F. Beerendonk. "Influence of calcium-NOM complexes on fouling of nanofiltration membranes in drinking water production." Water Supply 6, no. 4 (2006): 171–78. http://dx.doi.org/10.2166/ws.2006.765.

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The application of nanofiltration is growing rapidly in drinking water and wastewater treatment. The main problem during the operation of nanofiltration membranes is membrane fouling, part of which is due to the presence of Natural Organic Matter (NOM) in sources for drinking water. In this work the effect of calcium was investigated on the nanofiltration fouling behavior in relation to NOM. From Li and Elimelech (2004) it is known that calcium enhanced membrane fouling significantly due to the formation of calcium-NOM complexes. Two techniques were used in our research to determine the part o

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Chiao, Yu-Hsuan, Tanmoy Patra, Micah Belle Marie Yap Ang, et al. "Zwitterion Co-Polymer PEI-SBMA Nanofiltration Membrane Modified by Fast Second Interfacial Polymerization." Polymers 12, no. 2 (2020): 269. http://dx.doi.org/10.3390/polym12020269.

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Nanofiltration membranes have evolved as a promising solution to tackle the clean water scarcity and wastewater treatment processes with their low energy requirement and environment friendly operating conditions. Thin film composite nanofiltration membranes with high permeability, and excellent antifouling and antibacterial properties are important component for wastewater treatment and clean drinking water production units. In the scope of this study, thin film composite nanofiltration membranes were fabricated using polyacrylonitrile (PAN) support and fast second interfacial polymerization m

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Chugunov, Aleksandr S., and Vadim A. Vinnitskii. "Nanofiltration fractionation of radioactive solution components as a method for reducing the volume of wastes intended for permanent disposal." Nuclear Energy and Technology 5, no. 2 (2019): 123–28. http://dx.doi.org/10.3897/nucet.5.35801.

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Baromembrane purification methods as part of liquid radioactive media processing complexes are increasingly included in the practice of radioactive waste management. The paper presents the results of a comparative study of the performance of commercially available hyper- and nanofiltration elements when a simulated solution is continuously phosphatized. The study revealed the influence of changes in the feed solution salinity on the permeability, working pressure in the brine chamber of the hyper- and nanofiltration apparatus and the permeate salinity. It is shown that, in a closed loop of liq

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Marin Galvin, R., and J. M. Rodriguez Mellado. "Quality Improvement of a Small Water Supply. A Practical Application of a Full System of Nanofiltration." Engineering, Technology & Applied Science Research 3, no. 2 (2013): 381–86. http://dx.doi.org/10.48084/etasr.294.

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The THM level in the Spanish drinking water is limited to less than 0.100 mg/L, due to its potential toxicological effect on humans. This paper investigates the comparison of the results obtained in a small supply of water that historically presented THM contents out of the Spanish normative, versus the results there obtained when the treatment was modified with the inclusion of a nanofiltration system. So, the conventional treatment first applied was that of pre-oxidation with chlorine and/or KMnO4, followed by coagulation with aluminum salts directly on closed sand filter, and disinfection f

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Mänttäri, M., and M. Nyström. "Ultrafiltration and nanofiltration in the pulp and paper industry using cross-rotational (CR) filters." Water Science and Technology 50, no. 3 (2004): 229–38. http://dx.doi.org/10.2166/wst.2004.0200.

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Ultra- and nanofiltration with high shear CR-filters have been utilized for cleaning of clear filtrates and effluents from the pulp and paper industry. The aim was to find out how different nanofiltration membranes operate at high shear conditions. The filtration efficiency of the membranes was evaluated by measuring flux, retention and fouling at various recovery and pH conditions. High fluxes (∼100 L/(m2h)) for nanofiltration membranes were measured when circulation waters from the paper machine were filtered at neutral conditions. In the filtration of discharge of external activated sludge

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Chugunov, Aleksandr S., and Vadim A. Vinnitskii. "Nanofiltration fractionation of radioactive solution components as a method for reducing the volume of wastes intended for permanent disposal." Nuclear Energy and Technology 5, no. (2) (2019): 33–38. https://doi.org/10.3897/nucet.5.35801.

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Abstract (sommario):

Baromembrane purification methods as part of liquid radioactive media processing complexes are increasingly included in the practice of radioactive waste management. The paper presents the results of a comparative study of the performance of commercially available hyper- and nanofiltration elements when a simulated solution is continuously phosphatized. The study revealed the influence of changes in the feed solution salinity on the permeability, working pressure in the brine chamber of the hyper- and nanofiltration apparatus and the permeate salinity. It is shown that, in a closed loop of liq

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Mohammad, Abdul Wahab. "Editorial: Nanofiltration membranes." Desalination 315 (April 2013): 1. http://dx.doi.org/10.1016/j.desal.2013.02.012.

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Sherhan, Bashir Y., Areej D. Abbas, Hussein A. Alabdly, et al. "Preparation of PPSU Hollow Fiber Nanofiltration Membranes for Nanofiltration Application." Iraqi Journal of Chemical and Petroleum Engineering 18, no. 2 (2017): 13–25. http://dx.doi.org/10.31699/ijcpe.2017.2.2.

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PPSU hollow fiber nanofiltration membranes are prepared by applying two concentrations and various extrusion pressures according to the phase inversion method. Cross-sectional area and outer structures were characterized by using scanning electron microscope (SEM) and atomic force microscopy (AFM). In additional to the pore size distribution, either the mean roughness or the mean pore size of the PPSU hollow fiber surfaces was evaluated by AFM. It was found that the morphology of the PPSU fibers had both sponge-like and finger-like structures through different extrusion pressures and PPSU conc

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Chen, Hong Mei, Hong Xia Guo, Yue Ma, Zhen Ping Qin, and Guo Li Xie. "Rejection of Heavy Metal Ions with Polyelectrolyte Composite Nanofiltration Membrane." Applied Mechanics and Materials 529 (June 2014): 87–91. http://dx.doi.org/10.4028/www.scientific.net/amm.529.87.

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Nanofiltration membrane was prepared by static layer-by-layer (LBL) self-assembly of poly (ethyleneimine) (PEI) and poly (sodium 4-styrenesulfonate) (PSS) on the modified poly-arcylonitrile ultra-filtration membrane. Study on self-assembly of polyelectrolyte membranes with changing surface charges and wettability, rejection properties of nanofiltration membrane in different conditions and pH with respect to heavy metal ions, namely Ni2+and Cd2+were investigated. The results show that the PEI/PSS membrane composed of 4 bilayers at operating pressure 0.4MPa, rejection of PAN-PEI/PSS nanofiltrati

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35

Vakili-Nezhaad, G. R., and Z. Akbari. "A Case Study of Nanofiltration Using an Irreversible Thermodynamics-Based Model." ISRN Thermodynamics 2012 (February 2, 2012): 1–4. http://dx.doi.org/10.5402/2012/878279.

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The extended Spiegler-Kedem model that can be solved by using genetic algorithm (GA) has been used for study of the rejection of charged and uncharged solutes in a nanofiltration process. In this work, the accuracy and applicability of this model were tested with the data obtained from the nanofiltration of a real solution. The permeated solution was obtained from the whey ultrafiltration system (ultrafiltered whey). The studied process separates lactose and mineral salts from ultrafiltered whey. Moreover, the ultrafiltered whey nanofiltration system has been simulated with higher precision co

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Oh, J. I., T. Urase, H. Kitawaki, M. M. Rahman, M. H. Rhahman, and K. Yamamoto. "Modeling of arsenic rejection considering affinity and steric hindrance effect in nanofiltration membranes." Water Science and Technology 42, no. 3-4 (2000): 173–80. http://dx.doi.org/10.2166/wst.2000.0376.

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Abstract (sommario):

Rejection characteristics of arsenic compounds such as arsenite, dimethyl arsinic acid, and arsenate were examined regarding the effect of pH change in nanofiltration. Rejection mechanism of arsenic compounds was explained by comparing experimental rejection with calculation of the Extended Nernst-Planck model coupled with steric hindrance model. Nanofiltration membranes of the same material show similar rejection characteristics of arsenic compounds in different species. Steric hindrance and electrostatic effect in the nanofiltration membranes was well described by the model because the rejec

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37

Darbi, Ashref, Thiruvenkatachari Viraraghavan, Yee-Chung Jin, Larry Braul, and Darrell Corkal. "Sulfate Removal from Water." Water Quality Research Journal 38, no. 1 (2003): 169–82. http://dx.doi.org/10.2166/wqrj.2003.011.

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Abstract (sommario):

Abstract Sulfate occurs naturally in groundwater. Concerns regarding the health effects from sulfate in drinking water have been raised because of reports that diarrhea may be associated with water that contains high levels of sulfate. In the livestock production industry, there is a concern that high levels of sulfate in water can adversely affect productivity. Different methods can be used to remove sulfate from water. Proven technologies are ion-exchange, nanofiltration, reverse osmosis, and electrodialysis. A few earlier studies have shown that the use of bentonite/kaolinite for sulfate re

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Zhao, Wenjie, Zhongyu Du, Ning Kuang, et al. "Simulation of the nanofiltration of pulping black liquor by dynamic blade cross-flow with membrane." BioResources 15, no. 3 (2020): 5593–615. http://dx.doi.org/10.15376/biores.15.3.5593-5615.

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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 o

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39

Kukucka, Miroslav, and Nikoleta Kukucka. "Groundwater nanofiltration process efficiency improvement with additional concentrate membrane treatment." Chemical Industry 70, no. 5 (2016): 501–9. http://dx.doi.org/10.2298/hemind150627056k.

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Nanofiltration (NF) of waste water originated from nanofiltration drinking water plant stationed in town of Kikinda (Northern Serbia) was investigated. Experiments on removal characteristics of nanofiltration membranes when exposed to influent rich in arsenic and natural organic matter under different flux and transmembrane pressure (TMP) conditions were conducted in order to obtain drinking water from waste water and reduce total amount of waste water. Applied NF membranes showed remarkable removal characteristic. Also, obtained result for concentrate yield, an indicator of reduced concentrat

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40

Lai, Dat Quoc, An Thanh Ngo, Phung Thi Kim Le, Dung Hoang Nguyen, and Long Quang Nguyen. "TECHNICAL ASSESSMENT OF GAMMA-AMINO BUTYRIC ACID (GABA) PRODUCTION FROM RICE BRAN." Vietnam Journal of Science and Technology 57, no. 3B (2019): 137. http://dx.doi.org/10.15625/2525-2518/57/3b/14499.

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Abstract (sommario):

This research focused on technical assessment of GABA production from rice bran through fermentation by Lactobacillus brevis. Influence of operating pressure on separation of GABA by nanofiltration membrane was investigated and 4 bar was suitable for the nanofiltration process. The purification of GABA by nanofiltration with constant feed volume was carried out and purity of GABA reached 4.8 folds, compared to feed, at 5 volumes of added water. At 40 of concentration factor in concentration of GABA solution by nanofiltration with full recycle of retentate, content of GABA reached 49.8 g/L. The

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Valentukeviciene, Marina, Ramune Zurauskiene, and Youssef Amine Boussouga. "Fluoride Removal from Groundwater by Technological Process Optimization." Ecological Chemistry and Engineering S 26, no. 1 (2019): 133–47. http://dx.doi.org/10.1515/eces-2019-0010.

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Abstract (sommario):

Abstract Fluoride removal from aqueous solutions was studied using nanofiltration and sorption techniques which have always been best key ways to deal with water contaminated by fluoride. In this presented work, we were firstly interested on fluoridated rejected water overcoming the drawback of RO membrane process of groundwater treatment plant in Baltic region (Kretinga, Lithuania). Opoka sorbent has shown effective results of fluoride sorption with efficiency higher than 77 %. In order to understand the sorption phenomenon and to validate the results obtained, we have applied experimental da

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42

Huliienko, Serhii, Yaroslav Kornienko, Svitlana Muzyka, and Kateryna Holubka. "Mathematical Simulation of Nanofiltration Process: State of Art Review." Chemistry & Chemical Technology 18, no. 2 (2024): 187–99. http://dx.doi.org/10.23939/chcht18.02.187.

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Abstract (sommario):

A review of publications devoted to the mathematical simulation of the nanofiltration process was carried out, the advantages, limitations, and areas of application of various modeling approaches were determined. It was found that the most effective approaches are based on the extended Nernst-Planck equation, Donnan equilibrium, as well as methods of computational fluid dynamics and molecular dynamics. The use of software for solving nanofiltration simulation problems was considered.

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Aliyeva, Olga Olegovna, and Xatira Mirzababa Zulfuqarova. "SALT WATER DESALATION BY THE METHOD OF NANOFILTRATION." Annali d'Italia 59 (July 5, 2023): 22–25. https://doi.org/10.5281/zenodo.8116227.

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Abstract (sommario):

This article discusses the issues of preventing sulfate scale formation in desalination systems by using the method of preliminary nanofiltration. As a result of computational experiments on a computer, the process of nanofiltration purification of the Caspian water was studied. High selectivity values of NF-200-400i membranes for scale-forming components have been established. It has been shown that preliminary nanofiltration of Caspian water reliably prevents the precipitation of sulfate deposits at subsequent stages of reverse osmosis and thermal desalination. It becomes possible to increas

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44

Itoh, M., S. Kunikane, and Y. Magara. "Evaluation of nanofiltration for disinfection by-products control in drinking water treatment." Water Supply 1, no. 5-6 (2001): 233–43. http://dx.doi.org/10.2166/ws.2001.0119.

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Abstract (sommario):

DBP control by nanofiltration was studied. Nine DBPs including THMs were selected as target compounds. Reagent DBPs and DBPs formed as a result of chlorination of NOM contained in river water, were applied to nanofiltration to examine DBPs removal. Humic acid was used to investigate DBP precursor control. Nanofiltration was conducted for about one day for each experiment using two 2-inch membrane modules. NF showed high performance for DBP precursor removal but little effect on the removal of DBPs themselves, especially THMs. In the experiment of DBP precursors removal, rejections were 98 to 1

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45

Sawadogo, Boukary, Yacouba Konaté, Seyram Kossi Sossou, Nana Fassouma Ado Saidou, Abdoul Wahab Nouhou Moussa, and Harouna Karambiri. "Removal of Sulphate Ions from Borehole Water Using Nanofiltration and Reverse Osmosis." Water 14, no. 21 (2022): 3422. http://dx.doi.org/10.3390/w14213422.

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Abstract (sommario):

Consumption of contaminated water poses health hazards to humanity and hence increases the need for treatment. An excessive level of sulphate in borehole water was detected in the drinking water supply of Garpéné village in Burkina Faso. This study aimed to evaluate the performance of nanofiltration and reverse osmosis for the removal of sulphate ions from borehole water. A combined nanofiltration and reverse osmosis pilot was used for the treatment of the raw borehole water and some prepared synthetic solutions. Different experimental conditions were used to evaluate the effects of the pressu

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46

Ghazali, Nazlee Faisal, and Lim Ki Min. "Mass Transport Models in Organic Solvent Nanofiltration: A Review." Journal of Advanced Research in Fluid Mechanics and Thermal Sciences 76, no. 3 (2020): 126–38. http://dx.doi.org/10.37934/arfmts.76.3.126138.

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Abstract (sommario):

Membrane technology has been gradually used as an alternative to the conventional separation and purification method in various industries. In recent years, solvent-stable nanofiltration or organic solvent nanofiltration has becoming practicable through the development of solvent-stable commercial polymeric membranes. Organic solvent nanofiltration has a great potential to replace the conventional energy-demanding process such as distillation due to its ability of separating organic solvents and solutes on a molecular level without phase change and operation at relatively mild temperature. Pre

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47

Kuzminova, Anna, Mariia Dmitrenko, Andrey Zolotarev, et al. "Novel Mixed Matrix Membranes Based on Polymer of Intrinsic Microporosity PIM-1 Modified with Metal-Organic Frameworks for Removal of Heavy Metal Ions and Food Dyes by Nanofiltration." Membranes 12, no. 1 (2021): 14. http://dx.doi.org/10.3390/membranes12010014.

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Abstract (sommario):

Nowadays, nanofiltration is widely used for water treatment due to its advantages, such as energy-saving, sustainability, high efficiency, and compact equipment. In the present work, novel nanofiltration membranes based on the polymer of intrinsic microporosity PIM-1 modified by metal-organic frameworks (MOFs)—MIL-140A and MIL-125—were developed to increase nanofiltration efficiency for the removal of heavy metal ions and dyes. The structural and physicochemical properties of the developed PIM-1 and PIM-1/MOFs membranes were studied by the spectroscopic technique (FTIR), microscopic methods (S

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48

Yu, San Chuan, Zhi Wen Chen, Mei Hong Liu, and Jing Wei Zhao. "Comparative Study on the Treatment of Biologically Treated Textile Effluent by Nanofiltration and Reverse Osmosis for Water Reuse." Advanced Materials Research 441 (January 2012): 584–88. http://dx.doi.org/10.4028/www.scientific.net/amr.441.584.

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Abstract (sommario):

In view of the water shortage, the increasingly severe regulations as well as the release thresholds, it is becoming increasingly necessary to reuse the textile effluents. This work concerned the treatment of textile plant effluent after conventional biological processing by membrane technology for water reuse. Desal5 DK nanofiltration (NF) membrane and BW30 reverse osmosis (RO) membrane were investigated in this study in terms of COD and color removal, salinity reduction as well as permeate flux through cross-flow permeation tests. The results showed that the Desal5 DK nanofiltration membrane

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49

Sari, Syifa Aulia Permata, Lesta Lesta, Syarmila Syarmila, et al. "Extra A Review of Nanofiltration Membrane Technology To Treat Water Problems." Stannum : Jurnal Sains dan Terapan Kimia 4, no. 2 (2022): 74–80. http://dx.doi.org/10.33019/jstk.v4i2.2936.

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Abstract (sommario):

One of the most widely used membranes is the nanofiltration membrane, this membrane is formed from various nanomaterials, such as metal nanoparticles and metal oxides, carbon-based nanoparticles, metal organic frameworks, and micro or organic nanoparticles. Membrane separation processes are used to concentrate or fractionate liquids to produce two liquids with different compositions. This makes the nanofiltration process an alternative compared to conventional processes. The potential of nanofiltration membranes can be used in textile industry wastewater treatment, tofu liquid waste, tofu liqu

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50

Liu, Lulu, Weilin Wu, Xiaogang Jin, Xiong Luo, and Lili Wu. "Interfacial Polymerization on Polyethersulfone Ultrafiltration Membrane to Prepare Nanofiltration Layers for Dye Separation." Polymers 15, no. 9 (2023): 2018. http://dx.doi.org/10.3390/polym15092018.

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Abstract (sommario):

Nanofiltration membranes are of great significance to the treatment of dye wastewater. Interfacial polymerization is a widely used method to fabricate nanofiltration membranes. In this study, the interaction of tannic acid-assisted polyethylene polyamine (PEPA) with terephthalaldehyde (TPAL) was performed on PES ultrafiltration membranes using novel nitrogen-rich amine monomers and relatively less reactive aldehyde-based monomers. A new nanofiltration membrane ((T-P-T)/PES) was prepared by interfacial polymerization. Fourier transform infrared spectroscopy, X-ray photoelectron spectroscopy, an

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