Influence of membrane and colloid characteristics on fouling of nanofiltration membranes

Boussu, Katleen; Belpaire, A.; Volodin, A.; Haesendonck, C. Van; Meeren, Paul Van der; Vandecasteele, Carlo; Bruggen, Bart Van der

doi:10.1016/j.memsci.2006.12.001

Cited by 131 publications

(63 citation statements)

References 37 publications

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“…Indeed, there is a correlation between fouling tendency and the membrane surface roughness and this totally agrees with previous studies (e.g. [19,23,27]). As presented (Table 1) the NF-90 has a significant surface roughness of 63.9 nm whereas the ESPA2 has a slightly smoother membrane surface with a corresponding surface roughness (30.0 nm).…”

Section: Ewb10d At Southlands-botany Baysupporting

confidence: 93%

“…"valley clogging" has taken place ( [19,21]. Nevertheless, the colloids are distributed over the entire membrane surface and formed a dense and uniform cake layer on the membrane surface due to hydrophobic interactions between the foulants and membrane surfaces ( [22,23]. Distribution of elements deposited on the membrane surface which formed the fouling layer was obtained from SEM with additional semi-quantitative energy dispersive spectrometer (EDS) analysis.…”

Section: Sem-eds and Afm Analysismentioning

confidence: 99%

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Removal of volatile organic compounds (VOCs) from groundwater by reverse osmosis and nanofiltration

Altalyan

Jones

Bradd

et al. 2016

Journal of Water Process Engineering

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. (2016). Removal of volatile organic compounds (VOCs) from groundwater by reverse osmosis and nanofiltration. Journal of Water Process Engineering, 9 9-21. Removal of volatile organic compounds (VOCs) from groundwater by reverse osmosis and nanofiltration AbstractA comprehensive study was conducted to examine the removal of volatile organic compounds (VOCs) which exist in groundwater at Southlands-Botany Bay (Sydney region). The ability of nanofiltration (NF) and reverse osmosis (RO) as advanced treatments was investigated using two commercially available NF or RO membranes. Laboratory-scale tests were used with cross-flow; tests were conducted with 16 ubiquitous compounds that represented the significant volatile organic compounds found in the contaminated groundwater. The results reported in this study indicate that the removal efficiency of reverse osmosis (RO) was better than NF in rejecting the VOCs detected in groundwater. This study revealed that the performance of NF and RO membranes in rejecting hydrophilic volatile organic compounds was higher than that for hydrophobic compounds and the highest rejection achieved by NF and RO membranes amounted 98.4% and 100%, respectively. Hydrophilic compounds can be effectively rejected by NF/RO membranes using the size exclusion mechanism (steric hindrance), whereas hydrophobic compounds can be adsorbed into NF/RO membranes and then diffuse through the dense polymeric matrix, resulting in the lower removal for these compounds compared to hydrophilic compounds. Keywords:Volatile organic compounds (VOCs) Reverse osmosis (RO) Nanofiltration (NF) Botany Bay ABSTRACT A comprehensive study was conducted to examine the removal of volatile organic compounds (VOCs) which exist in groundwater at Southlands-Botany Bay (Sydney region).The ability of nanofiltration (NF) and reverse osmosis (RO) as advanced treatments was investigated using two commercially available NF or RO membranes. Laboratory-scale tests were used with cross-flow; tests were conducted with 16 ubiquitous compounds that represented the significant volatile organic compounds found in the contaminated groundwater.The results reported in this study indicate that the removal efficiency of reverse osmosis (RO) was better than NF in rejecting the VOCs detected in groundwater. This study revealed that the performance of NF and RO membranes in rejecting hydrophilic volatile organic compounds was higher than that for hydrophobic compounds and the highest rejection achieved by NF and RO membranes amounted 98.4 % and 100 %, respectively. Hydrophilic compounds can be effectively rejected by NF/RO membranes using the size exclusion mechanism (steric hindrance), whereas hydrophobic compounds can be adsorbed into NF/RO membranes and then diffuse through the dense polymeric matrix, resulting in the lower removal for these compounds compared to hydrophilic compounds.

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Section: Ewb10d At Southlands-botany Baysupporting

confidence: 93%

Section: Sem-eds and Afm Analysismentioning

confidence: 99%

Removal of volatile organic compounds (VOCs) from groundwater by reverse osmosis and nanofiltration

Altalyan

Jones

Bradd

et al. 2016

Journal of Water Process Engineering

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“…Boussu in his Ph.D. thesis indicates "The mean pore size represents the size of a molecule with 50% retention" [81]. From the present work retention measurement, for any pressure over 1 MPa, the true retention would be 0.5 if the solute size was between EG and DEG (as can be seen in Figs.…”

Section: Pore Radiusmentioning

confidence: 52%

“…Once the permeation process had ended the concentrations of the feed solution inside 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 [81,82]. These values are slightly lower than obtained by us but close to them.…”

Section: Retention Measurementsmentioning

confidence: 99%

Pore size analysis from retention of neutral solutes through nanofiltration membranes. The contribution of concentration–polarization

et al. 2014

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Pore size distribution is one of the most important characteristics of a membrane.This can be obtained from the fitting of pore radius calculated from retention versus flux measurements for a set of solute solutions. In this work a set of non-charged similar molecules are chosen as solutes to minimize other interactions apart of those related to size. The hydrodynamic model will be used to characterize the behavior of the membrane to uncharged solutes, assuming that membrane pores are straight and cylindrical.As is known, the phenomenon of concentration polarization must be taken into account because true retention is not experimentally accessible by concentration measurements. Frequently, the film layer model is applied for the dependence of

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“…in the purification of surface water. Effects of fouling for several representative nanofiltration membranes during filtration of several types of colloids in different circumstances (pH, ionic strength) have been studied by Boussu et al [6]. It was shown that not only the membrane, but also the colloid characteristics are crucial to control membrane fouling.…”

mentioning

confidence: 99%

Increasing Prospects for Nanofibers and Nanofiltration

Ugbolue¹

2012

J Textile Sci Eng

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Influence of membrane and colloid characteristics on fouling of nanofiltration membranes

Cited by 131 publications

References 37 publications

Removal of volatile organic compounds (VOCs) from groundwater by reverse osmosis and nanofiltration

Removal of volatile organic compounds (VOCs) from groundwater by reverse osmosis and nanofiltration

Pore size analysis from retention of neutral solutes through nanofiltration membranes. The contribution of concentration–polarization

Increasing Prospects for Nanofibers and Nanofiltration

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