UF membrane fouling by mixtures of humic acids and sodium alginate: Fouling mechanisms and reversibility

Katsoufidou, K.; Sioutopoulos, D.C.; Yiantsios, S.G.; Karabelas, A.J.

doi:10.1016/j.desal.2010.08.017

Cited by 151 publications

(72 citation statements)

References 25 publications

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“…of molecular interactions within and between humics and polysaccharide on UF fouling 58 mechanisms at organic concentration levels relevant for Swiss lakes. A similar study was also 59 conducted by Katsoufidou et al, (2010). Their studies highlighted that when a mixture of two 60 or more fouling species was present in water, interplay between organic foulants (foulant-61 foulant) as well as foulant-membrane interaction were observed.…”

Section: Accepted Manuscript M a mentioning

confidence: 57%

Experimental and computational investigations of the interactions between model organic compounds and subsequent membrane fouling

et al. 2014

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Please cite this article as: Myat, D.T., Stewart, M.B., Mergen, M., Zhao, O., Orbell, J.D., Gray, S., Experimental and Computational investigations of the Interactions between model organic compounds and subsequent membrane fouling, Water Research (2013Research ( ), doi: 10.1016Research ( /j.watres.2013 This is a PDF file of an unedited manuscript that has been accepted for publication. As a service to our customers we are providing this early version of the manuscript. The manuscript will undergo copyediting, typesetting, and review of the resulting proof before it is published in its final form. Please note that during the production process errors may be discovered which could affect the content, and all legal disclaimers that apply to the journal pertain. The formation of aggregates of sodium alginate and bovine serum albumin (BSA) (as 13 representative biopolymers) with humic acid were detected by Liquid Chromatography (LC) 14 UV 254 response in the biopolymer region for mixture solutions. BSA interaction with humic 15 acid showed that aggregation occurred both in the presence and absence of calcium, 16 suggesting that multivalent ions did not play a part in the aggregation process. Similar 17 analyses of the alginate interaction with humic acid also showed a positive interaction, but 18 only in the presence of calcium ions. The fouling characteristics for the BSA-humic acid 19 mixture appeared to be significantly greater than the fouling characteristics of the individual 20 solutions, while for the sodium alginate-humic acid mixture, the fouling rate was similar to 21 that of the sodium alginate alone. The effectiveness of hydraulic backwashing, 10-15% 22 reversibility, was observed for the BSA-humic acid mixture, while the % reversibility was 23 20-40% for the sodium alginate-humic acid mixture. Increased humic acid and DOC 24 rejection were observed for both BSA-humic acid and sodium alginate-humic acid solutions 25 compared to the individual solutions, indicating that the biopolymer filter cakes were able to 26 M A N U S C R I P T A C C E P T E D ACCEPTED MANUSCRIPT2 retain humic acids. When compared with BSA-humic acid mixture solution, greater removal 27 of humic acid was observed for alginate-humic mixture, suggesting that sodium alginate may 28 have a greater capacity for associations with humic acid when in the presence of calcium than 29 BSA. Complementary molecular dynamics simulations were designed to provide insights into 30 the specific mechanisms of interaction between BSA and humic acid, as well as between 31 alginate and humic acid. For the BSA-humic acid system; electrostatic, hydrophobic and 32 hydrogen bonding were the dominant types of interactions predicted, whilst divalent ion-33 mediated bonding was not identified in the simulations, which supported the LC-results. 34Similarly for the alginate-humic acid system, the interactions predicted were divalent ion-35 mediated interactions only and this was also supported the LC results. This work suggests 36 that LC-UV 254 might be used to ...

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Section: Accepted Manuscript M a mentioning

confidence: 57%

Experimental and computational investigations of the interactions between model organic compounds and subsequent membrane fouling

et al. 2014

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“…Previous studies have demonstrated that organic fouling behavior in filtration was dependent on chemical characteristics of feed water, membrane properties, foulant-foulant and foulant-membrane interactions [8,17,32,35]. As discussed in Section 3.1, in HA/ BSA mixtures ultrafiltration experiments, fouling resistance increased slowly compared to other organic mixtures, while HA/ SA mixtures exhibited the highest fouling resistance, regardless of the concentration ratios (Fig.…”

Section: Fouling Mechanismmentioning

confidence: 96%

“…HA can function as a bridge between alginate and membrane, causing a more stable and less reversible fouling layer than the individual alginate cake. However, Katsoufidou et al [17] studied the effect of HA/SA mixtures during UF hollow fibers in dead-end mode in the presence and absence of calcium ions. The experimental results manifested that no significant synergistic effects occurred.…”

Section: Introductionmentioning

confidence: 99%

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Identification of key factors affecting the organic fouling on low-pressure ultrafiltration membranes

Xiao

Zhang

et al. 2013

Journal of Membrane Science

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“…At present, there are several methods used to remove humic substance, especially humic acid as main component from peat water, such as coagulation-flocculation (Uygunera et al 2007), electro coagulation processes (Ghernaout et al 2009), oxidation (Uygunera et al 2007), photocatalysis (Sonea et al 2010), and membrane technology (Katsoufidou et al 2010). All of these alternative processes, however, are high operational cost, especially when applying membrane technology, because humic acid component tends to severely foul the membrane (Katsoufidou et al 2010) and hence, limiting the membrane application in this field. None of them, therefore, is considered by industries to be commercially viable because economically unrealistic.…”

Section: Introductionmentioning

confidence: 99%

Removal of humic acid from peat water using untreated powdered eggshell as a low cost adsorbent

Zulfikar

Novita²,

Hertadi

et al. 2013

Int. J. Environ. Sci. Technol.

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The main objective of this study is to investigate the possibility of powdered eggshell used as an adsorbent material for removal of humic acid from peat water. The influences of contact time, dose of eggshells, pH, and temperature were the factors considered in the removal processes of humic acid from peat water. In addition, adsorption isotherms of humic acid onto the powdered eggshell were also evaluated with the Langmuir and Freundlich approximations. Our results showed that the equilibrium of the process was eventually established after 60 min of the contact time, and also found that using 5 g of the powdered eggshell nearly 95 % of humic acid has been successfully removed from the peat water. The removal of humic acid gave better result when it was conducted at low pH, and it was almost unaffected the temperatures variation. The data was well fitted to Freundlich isotherm with the correlation coefficient of not \0.999, and could uptake the humic acid about 126.58 mg/g at pH 4.01, estimated from the Langmuir model. The kinetic experimental data proportionally correlated with the pseudo-second-order kinetic model with a rate constant in the range of 0.016-0.112 g mg -1 min -1 , while intra-particle-diffusion were the main rate determining step in the humic acid removal process. The powdered eggshell investigated in this study, thus, exhibited as a high potential adsorbent for the removal of humic acid from peat water.

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UF membrane fouling by mixtures of humic acids and sodium alginate: Fouling mechanisms and reversibility

Cited by 151 publications

References 25 publications

Experimental and computational investigations of the interactions between model organic compounds and subsequent membrane fouling

Experimental and computational investigations of the interactions between model organic compounds and subsequent membrane fouling

Identification of key factors affecting the organic fouling on low-pressure ultrafiltration membranes

Removal of humic acid from peat water using untreated powdered eggshell as a low cost adsorbent

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