Reverse osmosis membrane fabrication and modification technologies and future trends: A review

Hailemariam, Ruth Habte; Woo, Yun Chul; Damtie, Mekdimu Mezemir; Kim, Bong-Chul; Park, Kwang-Duck; Choi, June-Seok

doi:10.1016/j.cis.2019.102100

Cited by 184 publications

(57 citation statements)

References 121 publications

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“…Due to the energy need for obtaining fresh water in most cases and the water requirement for power production, the energy and water are interconnected 1 . Among the water treatment process, membrane-based techniques, and mostly reverse osmosis (RO) and forward osmosis (FO) have attracted considerable attention 2 . Unlike RO that works by external pressure, FO is an osmotically-driven membrane process with various applications like power generation, desalination, food and dairy processing, and wastewater treatment 3 , 4 .…”

Section: Introductionmentioning

confidence: 99%

Structural investigation and application of Tween 80-choline chloride self-assemblies as osmotic agent for water desalination

Bide

Fashapoyeh

Shokrollahzadeh

2021

Sci Rep

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Forward osmosis (FO) process has been extensively considered as a potential technology that could minimize the problems of traditional water desalination processes. Finding an appropriate osmotic agent is an important concern in the FO process. For the first time, a nonionic surfactant-based draw solution was introduced using self-assemblies of Tween 80 and choline chloride. The addition of choline chloride to Tween 80 led to micelles formation with an average diameter of 11.03 nm. The 1H NMR spectra exhibited that all groups of Tween 80 were interacted with choline chloride by hydrogen bond and Van der Waals’ force. The influence of adding choline chloride to Tween 80 and the micellization on its osmotic activity was investigated. Despite the less activity of single components, the average water flux of 14.29 L m‒2 h‒1 was obtained using 0.15 M of Tween 80-choline chloride self-assembly as draw solution in the FO process with DI water feed solution. Moreover, various concentrations of NaCl aqueous solutions were examined as feed solution. This report proposed a possible preparation of nonionic surfactant-based draw solutions using choline chloride additive with enhanced osmotic activities that can establish an innovative field of study in water desalination by the FO process.

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Section: Introductionmentioning

confidence: 99%

Structural investigation and application of Tween 80-choline chloride self-assemblies as osmotic agent for water desalination

Bide

Fashapoyeh

Shokrollahzadeh

2021

Sci Rep

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“…Among them, the ultrafiltration and nanofiltration are usually used for early steps to separate and/or purify chitin from raw protein solution. Commonly used membranes in these methods are porous polymeric films or the thin film composites (TFCs) based on them [6][7][8][9][10][11][12][13][14][15][16]. Liquid flows, including semi-finished or finished liquids, washing water, wastewater, are pumped and returned to high pressure in the production line [9][10][11][12].…”

Section: Introductionmentioning

confidence: 99%

“…Multilayered TFN membranes are often casted from nanocomposites or formed directly during the polymerization of the precursors. Nanomaterials are dispersed in thin films to generate or improve mechanical, chemical and special properties combined from different groups of materials (such as hydrophilic properties, creating interactive forces, static electricity, adsorption capacity, specific surface area, … ) [7,10,[13][14][15][16][17][18][19][20][21][22][23][24]. Therefore, multilayered TFN membranes have a diverse range of segregation, according to the purpose of use, and enhanced anti-fouling features.…”

Section: Introductionmentioning

confidence: 99%

Surface functionalization of nylon 66 membrane using para-phenylenediamine and carboxylic functionalized multi-walled carbon nanotubes for removal of calcium ions from aqueous solution

et al. 2021

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Nylon 66, which is an important membrane class used in manufacturing of chitin and chitosan, have a number of features that can be improved by surface functionalizations into a novel composite structure with support of ultrasound and silica gel (SiG) catalyst in a doubled amidation reaction. Firstly, nylon 66/para-phenylenediamine thin film composite (NP-TFC) is prepared from commercial nylon 66 membrane in an ultrasound assisted hydrolysis-amidation reaction. Secondly, carboxylic functionalized multi-walled carbon nanotubes (MWCNT-COOH) are grafted on the NP fiber in an ultrasound assisted/SiG-catalyzed amidation reaction, where para-phenylenediamine (pPD) role is cross-linking. As an excellent result confirmed by either Fourier transform infrared (FTIR), Raman spectrometry or scanning electron microscopic (SEM), bundled MWCNTs bridges are easily built in SiG-catalyzed ethanol media to connect nylon 66 fibers at distances of 0.3-1 lm. The vacuum filtration test confirmed that as-prepared nylon 66/pPD/MWCNTs structure has superior Ca 2þ rejection efficiency to that of original nylon 66.

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“…A typical TFC PA membrane is made by a support of polyester (PET) material over which a porous polysulfone (PSf) substrate is deposited by phase inversion method. Then, an active PA layer is formed on the porous PSf layer by interfacial polymerization technique [ 12 ]. This type of RO membrane was recycled using PA oxidizing agents such as sodium hypochlorite (NaOCl) to fully or partially degrade the PA layer responsible of irreversible fouling [ 8 , 10 , 13 , 14 , 15 , 16 , 17 , 18 , 19 , 20 , 21 , 22 ].…”

Section: Introductionmentioning

confidence: 99%

Electrospun Nanostructured Membrane Engineering Using Reverse Osmosis Recycled Modules: Membrane Distillation Application

2021

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As a consequence of the increase in reverse osmosis (RO) desalination plants, the number of discarded RO modules for 2020 was estimated to be 14.8 million annually. Currently, these discarded modules are disposed of in nearby landfills generating high volumes of waste. In order to extend their useful life, in this research study, we propose recycling and reusing the internal components of the discarded RO modules, membranes and spacers, in membrane engineering for membrane distillation (MD) technology. After passive cleaning with a sodium hypochlorite aqueous solution, these recycled components were reused as support for polyvinylidene fluoride nanofibrous membranes prepared by electrospinning technique. The prepared membranes were characterized by different techniques and, finally, tested in desalination of high saline solutions (brines) by direct contact membrane distillation (DCMD). The effect of the electrospinning time, which is the same as the thickness of the nanofibrous layer, was studied in order to optimize the permeate flux together with the salt rejection factor and to obtain robust membranes with stable DCMD desalination performance. When the recycled RO membrane or the permeate spacer were used as supports with 60 min electrospinning time, good permeate fluxes were achieved, 43.2 and 18.1 kg m−2 h−1, respectively; with very high salt rejection factors, greater than 99.99%. These results are reasonably competitive compared to other supported and unsupported MD nanofibrous membranes. In contrast, when using the feed spacer as support, inhomogeneous structures were observed on the electrospun nanofibrous layer due to the special characteristics of this spacer resulting in low salt rejection factors and mechanical properties of the electrospun nanofibrous membrane.

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Reverse osmosis membrane fabrication and modification technologies and future trends: A review

Cited by 184 publications

References 121 publications

Structural investigation and application of Tween 80-choline chloride self-assemblies as osmotic agent for water desalination

Structural investigation and application of Tween 80-choline chloride self-assemblies as osmotic agent for water desalination

Surface functionalization of nylon 66 membrane using para-phenylenediamine and carboxylic functionalized multi-walled carbon nanotubes for removal of calcium ions from aqueous solution

Electrospun Nanostructured Membrane Engineering Using Reverse Osmosis Recycled Modules: Membrane Distillation Application

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