On the influence of salt concentration on the transport properties of reverse osmosis membranes in high pressure and high recovery desalination

Ebrahim, Mahmood Abdulsalam; Karan, Santanu; Livingston, Andrew G.

doi:10.1016/j.memsci.2019.117339

Cited by 18 publications

(5 citation statements)

References 27 publications

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“…Generally, all the membranes exhibited a relatively smooth surface with a R a value < 10 nm, except for the SW30XLE membrane with a significantly rougher surface (R a : 68.86 nm). Our findings agreed with the work of Ebrahim et al [24], in which the researchers also reported a very similar roughness value of the SW30XLE membrane, i.e., 78 nm. From the figure, the SW30XLE and Duracid membranes display typical nodular morphologies with obvious hills and valleys.…”

Section: Surface Chemistry and Surface Morphology Of Membranessupporting

confidence: 93%

Evaluation of Surface Properties and Separation Performance of NF and RO Membranes for Phthalates Removal

et al. 2023

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Many studies indicated that phthalates, a common plasticizer, lurk silently in water bodies and can potentially harm living organisms. Therefore, removing phthalates from water sources prior to consumption is crucial. This study aims to evaluate the performance of several commercial nanofiltrations (NF) (i.e., NF3 and Duracid) and reverse osmosis (RO) membranes (i.e., SW30XLE and BW30) in removing phthalates from simulated solutions and further correlate the intrinsic properties of membranes (e.g., surface chemistry, morphology, and hydrophilicity) with the phthalates removal. Two types of phthalates, i.e., dibutyl phthalate (DBP) and butyl benzyl phthalate (BBP), were used in this work, and the effects of pH (ranging from 3 to 10) on the membrane performance were studied. The experimental findings showed that the NF3 membrane could yield the best DBP (92.5–98.8%) and BBP rejection (88.7–91.7%) regardless of pH, and these excellent results are in good agreement with the surface properties of the membrane, i.e., low water contact angle (hydrophilicity) and appropriate pore size. Moreover, the NF3 membrane with a lower polyamide cross-linking degree also exhibited significantly higher water flux compared to the RO membranes. Further investigation indicated that the surface of the NF3 membrane was severely covered by foulants after 4-h filtration of DBP solution compared to the BBP solution. This could be attributed to the high concentration of DBP presented in the feed solution owing to its high-water solubility (13 ppm) compared to BBP (2.69 ppm). Further research is still needed to study the effect of other compounds (e.g., dissolved ions and organic/inorganic matters that might be present in water) on the performance of membranes in removing phthalates.

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Section: Surface Chemistry and Surface Morphology Of Membranessupporting

confidence: 93%

Evaluation of Surface Properties and Separation Performance of NF and RO Membranes for Phthalates Removal

et al. 2023

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“…The salt rejection study of PANI–PES membranes using a feed (1900 ppm NaCl) was carried out using a dead-end stirred cell at 17 bar. 68,69 This feed concentration represents low-salinity fresh and brackish water feeds. Table 3 shows flux and % salt rejection from PES and PANI–PES membranes.…”

Section: Resultsmentioning

confidence: 99%

Novel polyaniline–polyethersulfone nanofiltration membranes: effect of in situ polymerization time on structure and desalination performance

et al. 2022

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“…As shown in Figure C–E, the O–CO peak disappeared with the introduction of amino groups of APD and TOB to form amide bonds. Moreover, the intensity of the two peaks associated with C–NH x located at 285.8 eV and N–CO located at 288.0 eV increased significantly . This result demonstrated that APD and TOB were successfully grafted on the SW30XLE membrane surface via amidation reaction. , The element compositions on the membrane surfaces are shown in Table S1.…”

Section: Resultsmentioning

confidence: 79%

Surface Modification of Reverse Osmosis Membranes for Enhanced Boron Removal and Fouling Resistance

Wang

Gao

et al. 2021

ACS EST Water

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The trade-off between selectivity and permeability as well as membrane fouling are major obstacles of seawater reverse osmosis (SWRO) membranes. Surface grafting of a functional layer on a thin-film composite (TFC) membrane is one of the most promising and versatile strategies to address the above problems. In this work, 3-amino-1,2-propanediol (APD) and tobramycin (TOB) were grafted on the commercial RO membrane SW30XLE surface to improve the boron removal rate and fouling resistance. The optimized TFC-TOB 2 /APD 10 membrane exhibited a 33.4% increase in permeate flux, while it maintained a high NaCl rejection of 98.0%. Compared with the SW30XLE membrane, the boron rejection of the TFC-TOB 2 /APD 10 membrane enhanced from 84.2 to 92.2%. Besides, the obtained membrane exhibited excellent antifouling properties, including organic fouling resistance, scaling control, and bactericidal capacity. Our work paved a new way for fabrication of high-performance RO membranes with enhanced permselectivity and antifouling properties, which are greatly desired in SWRO desalination.

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On the influence of salt concentration on the transport properties of reverse osmosis membranes in high pressure and high recovery desalination

Cited by 18 publications

References 27 publications

Evaluation of Surface Properties and Separation Performance of NF and RO Membranes for Phthalates Removal

Evaluation of Surface Properties and Separation Performance of NF and RO Membranes for Phthalates Removal

Novel polyaniline–polyethersulfone nanofiltration membranes: effect of in situ polymerization time on structure and desalination performance

Surface Modification of Reverse Osmosis Membranes for Enhanced Boron Removal and Fouling Resistance

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