Effect of solution composition on selectivity of reverse osmosis and nanofiltration membranes

Kagramanov, G. G.; Farnosova, E. N.

doi:10.1134/s0965544112080087

Cited by 8 publications

(6 citation statements)

References 1 publication

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“…The chemistry of the active PA layer governs water and ion transport across the membrane, achieving removal of up to >99% of dissolved salts and organic molecules . In water treatment plants or during industrial wastewater treatment, the PA layer is constantly subjected to a range of stresses associated with water transport under high pressure and exposure to a range of complex contaminants . Over the past four decades, improvements via chemical and fabrication routes have led to RO being the global primary desalination technology.…”

Section: Introductionmentioning

confidence: 99%

Amine Enrichment of Thin-Film Composite Membranes via Low Pressure Plasma Polymerization for Antimicrobial Adhesion

Reis

Dumée

et al. 2015

ACS Appl. Mater. Interfaces

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Thin-film composite membranes, primarily based on poly(amide) (PA) semipermeable materials, are nowadays the dominant technology used in pressure driven water desalination systems. Despite offering superior water permeation and salt selectivity, their surface properties, such as their charge and roughness, cannot be extensively tuned due to the intrinsic fabrication process of the membranes by interfacial polymerization. The alteration of these properties would lead to a better control of the materials surface zeta potential, which is critical to finely tune selectivity and enhance the membrane materials stability when exposed to complex industrial waste streams. Low pressure plasma was employed to introduce amine functionalities onto the PA surface of commercially available thin-film composite (TFC) membranes. Morphological changes after plasma polymerization were analyzed by SEM and AFM, and average surface roughness decreased by 29%. Amine enrichment provided isoelectric point changes from pH 3.7 to 5.2 for 5 to 15 min of plasma polymerization time. Synchrotron FTIR mappings of the amine-modified surface indicated the addition of a discrete 60 nm film to the PA layer. Furthermore, metal affinity was confirmed by the enhanced binding of silver to the modified surface, supported by an increased antimicrobial functionality with demonstrable elimination of E. coli growth. Essential salt rejection was shown minimally compromised for faster polymerization processes. Plasma polymerization is therefore a viable route to producing functional amine enriched thin-film composite PA membrane surfaces.

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Section: Introductionmentioning

confidence: 99%

Amine Enrichment of Thin-Film Composite Membranes via Low Pressure Plasma Polymerization for Antimicrobial Adhesion

Reis

Dumée

et al. 2015

ACS Appl. Mater. Interfaces

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“…Pressuredriven membrane processes are used for the purification of waste and process waters in food industry (clarification and preparation of juice concentrates, nonthermal sterilization, and processing of milk whey), pharmaceutical industry, etc. [201][202][203][204].…”

Section: Increasing the Performance Of Pressure-driven Membrane Procementioning

confidence: 99%

Prospects of Membrane Science Development

Apel

Бобрешова

Волков

et al. 2019

Membr. Membr. Technol.

126

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Membranes are widely used in modern technology. The demand for different types of membranes and membrane processes is increasing every year. This review summarizes the current state of the art and prospects of membrane science developments including membrane materials for gas separation, pervaporation, and pressure-driven membrane processes; ion-exchange, hybrid, and track-etched membranes; membranes for electrochemical sensors; and mathematical modeling of membrane separation processes and ion and water transport in membrane systems. Studies aimed at improving the selectivity and performance of membranes and their stability are surveyed. New approaches to the synthesis and modification of membranes as well as their advanced applications are discussed.

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“…Numerous researches are devoted to improving the supply of freshwater through desalination of seawater/brackish water or reuse of wastewater 4–7 . Among the existing technologies, pressure‐driven membrane technologies such as reverse osmosis and nanofiltration are widely used in the fields of reducing environmental pollution and desalination for their low energy consumption, simple process, easy scale, and high rejection of ions 8,9 . Reverse osmosis and nanofiltration membranes prepared based on interfacial polymerization technology have been used in large‐scale and low‐cost water purification applications 10–13 .…”

Section: Introductionmentioning

confidence: 99%

“…[4][5][6][7] Among the existing technologies, pressure-driven membrane technologies such as reverse osmosis and nanofiltration are widely used in the fields of reducing environmental pollution and desalination for their low energy consumption, simple process, easy scale, and high rejection of ions. 8,9 Reverse osmosis and nanofiltration membranes prepared based on interfacial polymerization technology have been used in large-scale and low-cost water purification applications. [10][11][12][13] In the typical fabrication process, the organic amine monomer is dissolved in water and the acid chloride monomer is dissolved in an organic solvent, which the two are not mutually soluble.…”

Section: Introductionmentioning

confidence: 99%

Constructing highly rough skin layer of thin film (nano)composite polyamide membranes to enhance separation performance: A review

Ren

et al. 2022

J of Applied Polymer Sci

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The thin-film (nano)composite (TFC or TFN) polyamide membrane prepared by interfacial polymerization method has a wide range of applications in water treatment. The preparation of TFC or TFN membrane with a highly wrinkled morphology in the selective layer can significantly improve the permeability of the membrane and is an effective way to break the "trade-off" effect. However, the formation mechanism of highly rough skin layer and the membrane fouling performance associated with the rough structure have been underexplored.

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Effect of solution composition on selectivity of reverse osmosis and nanofiltration membranes

Cited by 8 publications

References 1 publication

Amine Enrichment of Thin-Film Composite Membranes via Low Pressure Plasma Polymerization for Antimicrobial Adhesion

Amine Enrichment of Thin-Film Composite Membranes via Low Pressure Plasma Polymerization for Antimicrobial Adhesion

Prospects of Membrane Science Development

Constructing highly rough skin layer of thin film (nano)composite polyamide membranes to enhance separation performance: A review

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