Propagation-of-uncertainty from contact angle and streaming potential measurements to XDLVO model assessments of membrane–colloid interactions

Muthu, Satish; Childress, Amy E.; Brant, Jonathan A.

doi:10.1016/j.jcis.2014.04.052

Cited by 23 publications

(8 citation statements)

References 58 publications

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“…The range of standard deviation observed for all membrane zeta potential measurements was 0.1-1.1 mV. This range of standard deviation is well below that proposed in a recent study (75.0 mV) that investigated the propagation of uncertainty from zeta potential measurements for development of an XDLVO model of membrane-colloid interactions [35].…”

Section: Measurement Of Membrane Zeta Potentialsupporting

confidence: 62%

“…2a) exhibited a very negative zeta potential at low ionic strength (0.001 M KCl), the zeta potential of TFC1 (À 56 mV) is noticeably more negative than that of TFC2 (À 43 mV). It is well documented that the surface functional groups of polyamide TFC membranes are ionizable and that the streaming potential values of these membrane are dependent on the density of surface functional groups and electrolyte pH [35,39,49,51,65]. Although the absolute density of surface functional groups for TFC1 and TFC2 were not quantified in this study, results in Fig.…”

Section: Effects Of High Salinity On Membrane Zeta Potentialmentioning

confidence: 67%

“…Interfacial attraction and adhesion forces are commonly expressed as the sum of electrostatic, acid-base, van der Waals, and hydrophobic forces between the membrane polymer and feed stream contaminants [31]. Surface charge and hydrophobicity are of particular significance in the development Contents lists available at ScienceDirect journal homepage: www.elsevier.com/locate/memsci of interfacial force models such as the extended DerjaguinLandau-Verwey-Overbeek (XDLVO) model, which has been used to explain and predict membrane-foulant interactions [31][32][33][34][35][36]. Electrostatic and hydrophobic interactions are also dominant mechanisms affecting the rejection and transport phenomena of charged and uncharged solutes, respectively, in semipermeable membrane processes [37][38][39][40][41][42][43][44][45].…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Indirect determination of zeta potential at high ionic strength: Specific application to semipermeable polymeric membranes

Coday

Luxbacher

Childress

et al. 2015

Journal of Membrane Science

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a b s t r a c tThe understanding of membrane charge neutralization and diffuse layer compression at environmentally relevant ionic strengths is becoming increasingly important. In this work, the impact of high ionic strengths on membrane zeta potential was determined using a combination of streaming potential measurements and theoretical modeling. Streaming potential measurements were conducted on cellulose triacetate (CTA) and polyamide thin-film composite (TFC) membranes at ionic strengths within the operating limits of an electrokinetic analyzer. Zeta potential calculated from streaming potential was then extrapolated to environmentally relevant ionic strengths (0.05 to 1 M 1:1 electrolyte) using the Debye-Hückel and Helmholtz-Smoluchowski models. Extrapolated zeta potential values revealed that membrane charge neutralization and compression of the diffuse layer are limited by the size of the hydrated counter-ions, and full membrane charge neutralization, or even charge reversal, can not be achieved. The expected zeta potential of CTA membranes was similar to that of TFC membranes at high ionic strength, which has considerable implications in the comparison of membrane performance when treating brackish and saline feed waters. The methodologies developed in this work can help to better understand the contribution of electrostatic forces resulting from zeta potential to the sum of interfacial forces present at the membrane surface.

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Section: Measurement Of Membrane Zeta Potentialsupporting

confidence: 62%

Section: Effects Of High Salinity On Membrane Zeta Potentialmentioning

confidence: 67%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Indirect determination of zeta potential at high ionic strength: Specific application to semipermeable polymeric membranes

Coday

Luxbacher

Childress

et al. 2015

Journal of Membrane Science

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“…However, as discussed in detail later, the crude oil in this study was considered non-polar, so the DLVO model was more applicable. In applying the DLVO model, membrane was treated as a flat surface and oil droplets were approximated as perfect spheres and point charges, consistent with previous studies (Aimar and Bacchin 2010, Bacchin et al 1995, Bacchin et al 2002, Brant and Childress 2002, Hoek et al 2003, Muthu et al 2014. 8…”

Section: The Dlvo Modelmentioning

confidence: 74%

The effects of salt concentration and foulant surface charge on hydrocarbon fouling of a poly(vinylidene fluoride) microfiltration membrane

Kasemset

Kirschner

et al. 2017

Water Research

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The effects of inorganic salts and organic hydrocarbons on membrane fouling are often investigated independently. However, in many cases, these foulants are commonly found together, and such mixtures are rarely the subject of fouling studies. In this study, crude oil-in-water emulsions were formulated at three different added NaCl concentrations, 0, 10 and 10 M. Surface properties, such as surface tension and surface charge, of these emulsions and a poly(vinylidene fluoride) (PVDF) microfiltration (MF) membrane were characterized. The Derjaguin-Landau-Verwey-Overbeek (DLVO) model was utilized to simulate membrane-oil droplet and oil layer-oil droplet surface interactions. The DLVO model qualitatively predicted increasing fouling propensity with increasing emulsion salt concentration. The PVDF MF membrane was challenged with crude oil-in-water emulsions in constant permeate flux crossflow fouling tests to characterize the fouling propensity of the various emulsions, and the results were consistent with the model predictions.

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“…The contact angle of a membrane is related to its hydrophilicity and it depends on membrane material and porosity . The values obtained for UC100 and FORM003Ray were 27.4 ± 12.0° and 62.1 ± 3.1°, respectively.…”

Section: Resultsmentioning

confidence: 93%

Fractionation of secondary effluents of wastewater treatment plants in view of the evaluation of membrane fouling in a further ultrafiltration step

Ferrer‐Polonio

McCabe

Mendoza–Roca

et al. 2018

J of Chemical Tech & Biotech

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BACKGROUND Ultrafiltration is used as tertiary treatment in wastewater treatment plants (WWTP) for wastewater reclamation. However, membrane fouling is the main drawback of the process. In this work a new effluent organic matter fractionation procedure with adsorption resins (XAD‐8, XAD4 and IRA‐958) has been applied without recovering the adsorbed fractions. In this way, strong and weak hydrophobic and charged hydrophilic substances of the dissolved organic matter (DOM) were removed for further ultrafiltration, in order to know the most fouling fraction. For this, secondary effluents of two WWTP and two membranes with different molecular weight cut‐offs (100 kDa and 3 kDa) were used in ultrafiltration experiments in a laboratory plant. RESULTS The hydrophobic substances (especially the strong hydrophobics) predominated over the hydrophilic compounds. Membrane fouling was higher for the membrane with the highest molecular weight cut‐off (100 kDa). Thus, flux decline was around 25–47% higher than that measured for the 3 kDa membrane. The charged hydrophilic substances (CHi) were identified as the most fouling compounds with 100 kDa membrane. Reversible fouling was predominant. CONCLUSIONS The proposed fractionation system enabled determination of the contribution of the different fractions to the DOM. © 2017 Society of Chemical Industry

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Propagation-of-uncertainty from contact angle and streaming potential measurements to XDLVO model assessments of membrane–colloid interactions

Cited by 23 publications

References 58 publications

Indirect determination of zeta potential at high ionic strength: Specific application to semipermeable polymeric membranes

Indirect determination of zeta potential at high ionic strength: Specific application to semipermeable polymeric membranes

The effects of salt concentration and foulant surface charge on hydrocarbon fouling of a poly(vinylidene fluoride) microfiltration membrane

Fractionation of secondary effluents of wastewater treatment plants in view of the evaluation of membrane fouling in a further ultrafiltration step

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