Modification of poly(vinylidene fluoride) ultrafiltration membranes with poly(vinyl alcohol) for fouling control in drinking water treatment

Du, Jennifer Runhong; Peldszus, Sigrid; Huck, Peter M.; Feng, Xinbin

doi:10.1016/j.watres.2009.08.008

Cited by 196 publications

(89 citation statements)

References 29 publications

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“…PVA coated polyvinylidene fluoride membrane was cross-linked by glutaraldehyde vapor used for natural water filtration, which showed higher membrane flux and slower fouling rate against BSA solution [73]. Kim et al proposed that the modified NF and RO membranes dramatically reduced fouling in treatment of humic acid solution and wastewater effluent [74].…”

Section: Diminution Of Membrane Fouling By Surface Modificationmentioning

confidence: 99%

Protection of polymeric membranes with antifouling surfacing via surface modifications

Jayalakshmi

Nguyen

Jun

et al. 2016

Colloids and Surfaces A: Physicochemical and Engineering Aspect

137

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Section: Diminution Of Membrane Fouling By Surface Modificationmentioning

confidence: 99%

Protection of polymeric membranes with antifouling surfacing via surface modifications

Jayalakshmi

Nguyen

Jun

et al. 2016

Colloids and Surfaces A: Physicochemical and Engineering Aspect

137

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“…However, this hydrophobicity leads to hydrophobic interactions with, e.g., proteins resulting in a fouling layer precipitated on the membrane surface accompanied by a decreased membrane performance [1,2]. The common way to face this problem is to hydrophilize the hydrophobic membrane material [3][4][5][6][7][8][9][10] with different modification methods like grafting reactions [6,[8][9][10][11][12], electron beam (EB) irradiation [13,14] or plasma treatment [5,[15][16][17][18][19][20]. The hydrophilized membrane surfaces then show an increased fouling resistance due to the buildup of a water film on the membrane surface, which repels hydrophobic fouling reagents [21].…”

Section: Membrane Surface Hydrophilicity and Surface Chargementioning

confidence: 99%

Tailoring Membrane Surface Charges: A Novel Study on Electrostatic Interactions during Membrane Fouling

et al. 2015

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Abstract:In this work we aim to show that the overall surface potential is a key factor to understand and predict anti-fouling characteristics of a polymer membrane. Therefore, polyvinylidene fluoride membranes were modified by electron beam-induced grafting reactions forming neutral, acidic, alkaline or zwitterionic structures on the membrane surface. The differently charged membranes were investigated regarding their surface properties using diverse analytical methods: zeta potential, static and dynamic water contact angle, scanning electron microscopy (SEM) and X-ray photoelectron spectroscopy (XPS). Porosimetry measurements proved that there is no pore blocking due to the modifications. Monodisperse suspensions of differently charged polystyrene beads were synthesized by a radical emulsion polymerization reaction and were used as a model fouling reagent, preventing comparability problems known from current literature. To simulate membrane fouling, different bead suspensions were filtered through the membranes. The fouling characteristics were investigated regarding permeation flux decline and concentration of model fouling reagent in filtrate as well as by SEM. By considering electrostatic interactions equal to hydrophobic interactions we developed a novel fouling test system, which enables the prediction of a membrane's fouling tendency. Electrostatic forces are dominating, especially when charged fouling reagents are present, and can help to explain fouling characteristics that cannot be explained considering the surface wettability.

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“…According to the WHO, per capita water requirements for survival and cooking needs in an emergency have been estimated to be between 5 and 9 L/day, and including hygiene practices it increases to 7.5-15 L/day [37]. A household of 5 family members would therefore need a minimum of 37.5 L to fulfill their daily water demands.…”

Section: Cost Estimation Of a Pou Systemmentioning

confidence: 99%

Fouling in gravity driven Point-of-Use drinking water treatment systems

Chawla

Zwijnenburg²,

Kemperman

et al. 2017

Chemical Engineering Journal

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h i g h l i g h t sFouling in membrane based Point-of-Use drinking water systems was studied. Flux stabilization was observed for hollow fiber membrane configuration. Two different fouling mechanisms evolved in inside/out vs outside/in configuration. Intermittently operated inside/out membrane resulted in lowest hydraulic resistance. a r t i c l e i n f o Intermittent operation resulted in lower overall hydraulic resistances compared to continuously operated systems. This was due to the low organic loading and relaxation of the fouling layer during periods of standstill. In most experiments the fouling layer mainly consisted of diatoms, inorganic particles and few microbial clusters. The PoU systems investigated can be operated for longer duration without the need for strong chemical cleaning.

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Modification of poly(vinylidene fluoride) ultrafiltration membranes with poly(vinyl alcohol) for fouling control in drinking water treatment

Cited by 196 publications

References 29 publications

Protection of polymeric membranes with antifouling surfacing via surface modifications

Protection of polymeric membranes with antifouling surfacing via surface modifications

Tailoring Membrane Surface Charges: A Novel Study on Electrostatic Interactions during Membrane Fouling

Fouling in gravity driven Point-of-Use drinking water treatment systems

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