A mini-review on membrane fouling

Guo, Wenshan; Ngo, Huu Hao; Li, Jianxin

doi:10.1016/j.biortech.2012.04.089

Cited by 1,192 publications

(605 citation statements)

References 71 publications

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“…This ion rejection is fully consistent with the results of a negatively charged nanofiltration membrane, that separates on the basis of Donnan exclusion. Here SO 4 2− is much more strongly rejected than Cl − , explaining the high Na 2 SO 4 rejection compared to NaCl. On the other hand MgSO 4 is much less rejected compared to Na 2 SO 4 , as the divalent cation Mg 2+ tends to accumulate in the negative membrane, drawing its counter ion along.…”

Section: Membrane Performance As Nfmentioning

confidence: 86%

“…At a 1 g l −1 concentration, at the used pH of 7.3 the protein therefore has a net negative charge. The salts NaCl, Na 2 SO 4 and MgSO 4 , and organic compounds Bezafibrate and Naproxen, were used for NF performance tests and were purchased from Sigma Aldrich (The Netherlands). Deionised (DI) water used in all experiments was purified by a commercial water system (Synergy Water Purification System, Millipore) to a water resistivity of 18.2 MΩ cm or greater.…”

Section: Chemicalsmentioning

confidence: 99%

“…S3) in batch mode with recirculation of the retentate in the feed tank. The inorganic salts used for salt retention measurements were NaCl, MgSO 4 and Na 2 SO 4 . Salt retention of the coated hollow fibers was determined by cross flow filtration at 1 bar applied pressure with a crossflow velocity of 4.5 m s −1 (Reynolds number of approximately 3600).…”

Section: Filtration and Nf Performancementioning

confidence: 99%

“…Fouling can lead to lower fluxes and therefore higher operating costs, while frequent physical and chemical cleaning is costly and might shorten the membrane life-time [3,4]. Fouling is affected by many parameters, including the membrane surface chemistry, feed composition, operational parameters, and hydrodynamic conditions [4][5][6].…”

Section: Introductionmentioning

confidence: 99%

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Preparation of multifunctional hollow fiber nanofiltration membranes by dynamic assembly of weak polyelectrolyte multilayers

Ilyas

English

Aimar

et al. 2017

Colloids and Surfaces A: Physicochemical and Engineering Aspect

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A B S T R A C TIn this work, we investigate the effect of preparation conditions for dynamic layer-by-layer (LbL) coating, to prepare multifunctional hollow fiber nanofiltration (NF) membranes. Dynamic coating was performed at constant pressure and at variable cross flow speeds. In this way, polyelectrolyte multilayers (PEMs) were formed of the weak polyelectrolytes poly(acrylic acid) (PAA) and poly(allylamine hydrochloride) (PAH), on a negatively charged polyethersulfone ultrafiltration (UF) support. The resulting membrane performance was investigated and compared to membranes prepared by different methods (dip coating and dead end filtration), and it was found to be comparable. It was shown that PAH/ PAA multilayers can be fabricated reproducibly and homogenously using optimised dynamic LbL deposition conditions on single fiber module (surface area of 6.2 cm 2 ) as well as on a module of 15 fibers (surface area of 67 cm 2 ). Moreover, the approach of dynamic coating could be easily up scaled to coat existing UF modules. The prepared membranes reject the solutes on the basis of size exclusion and Donnan exclusion, retaining small organic solutes and divalent ions. Membranes terminated with PAA exhibit a low fouling tendency compared to membranes terminated with PAH and compared to the UF support membrane. Moreover, if severe membrane fouling would occur after prolonged use, the PEM coating, including any attached foulants can be removed by rinsing with a solution that combines a low pH and a high salinity (pH 3, 3 M). The surface of bovine serum albumin (BSA) fouled membranes were successfully cleaned at least twice, after which a new PEM coating could be re-applied by active coating.

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Section: Membrane Performance As Nfmentioning

confidence: 86%

Section: Chemicalsmentioning

confidence: 99%

Section: Filtration and Nf Performancementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Preparation of multifunctional hollow fiber nanofiltration membranes by dynamic assembly of weak polyelectrolyte multilayers

Ilyas

English

Aimar

et al. 2017

Colloids and Surfaces A: Physicochemical and Engineering Aspect

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“…-and H2O2 accumulation and thereby, a significant loss of membrane permeability might be obscured (27). The loss of membrane permeability might be accounted with an inherent phenomenon of lipid and protein oxidation under submergence (28). The Swarna Sub1A has earlier been nicely characterized with its cellular integrity for growth and development both under submergence as well as de-submergence.…”

Section: Discussionmentioning

confidence: 99%

Physiological characterization of SUB1 trait in rice under subsequent submergence and re-aeration with interaction of chemical elicitors

Sarkar

Adak

2017

Plant Sci. Today

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Abstract:In the present study, the sensitivity of two chemical elicitors: polyamine (PA) and salicylic (SA) acid were exercised for submergence sensitivity in Swarna Sub1A rice variety. Under 5 days of submergence, the antioxidation responses were more distinguished in plants against control. Along with the anti-oxidation modules, significant changes in biomolecule loss were registered through lipid and protein oxidation by 1.91 and 1.46 -fold respectively. PA and SA treated plants were the reliever to recover the membrane potential. Total carbohydrate and reducing sugars were varied under submergence by down regulation of 36.66 and 44.44% as compared to control. This was also supported by regulation of α-amylase activity under submergence that also recovered significantly with PA and SA treatments against submergence. In association with carbohydrate metabolism, Under submergence Swarna Sub1A recorded to be prone with oxidative stress through O 2. -(1.55 fold) and peroxide (1.70-fold) over-accumulation but recovered as PA and SA applied. In both cases, sustenance of non-enzymatic anti-oxidant like total carotenoid and lycopene content were also contributory through down-regulation. The enzymatic anti-oxidation paths like SOD, GPX, CAT and GR were regulated by 11.11, 19.54, 13.65, 10.03% declined respectively and thoroughly discussed with reference to PA and SA interactions.

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Antimicrobial Surfaces

Gratzl

Paulik

Lackner

2014

Kirk-Othmer Encyclopedia of Chemical Technology

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Biofouling, the attachment of biological material onto surfaces, is a pervasive and costly problem affecting marine equipment, membrane‐based systems, medical devices, textiles, food packing, and other systems and devices. The attachment of biological material to surfaces is often attributed to an initial microbial settling and the subsequent formation of a microbial biofilm on a surface. Antimicrobial agents have been used to prevent or reduce biofilm formation and are effective if their concentration is sufficiently high; however, biocides are toxic substances that affect the surrounding environment. This article provides an overview of the most important antimicrobial agents, technologies, and recent developments aimed at preventing biofouling. It focuses on antimicrobial surfaces and their current and prospective use, proposed mechanisms of action, and applications.

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A mini-review on membrane fouling

Cited by 1,192 publications

References 71 publications

Preparation of multifunctional hollow fiber nanofiltration membranes by dynamic assembly of weak polyelectrolyte multilayers

Preparation of multifunctional hollow fiber nanofiltration membranes by dynamic assembly of weak polyelectrolyte multilayers

Physiological characterization of SUB1 trait in rice under subsequent submergence and re-aeration with interaction of chemical elicitors

Antimicrobial Surfaces

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