Adhesion forces between humic acid functionalized colloidal probes and polymer membranes to assess fouling potential

Johnson, Daniel J.; Galiano, Francesco; Deowan, Shamim Ahmed; Hoinkis, Jan; Figoli, Alberto; Hilal, Nidal

doi:10.1016/j.memsci.2015.03.018

Cited by 35 publications

(31 citation statements)

References 34 publications

(39 reference statements)

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“…In addition a study of the fouling rejection of humic acid by several formulations of these membranes were reported by Johnson et al [26]. The chemicals used for preparing PBM membrane were: methyl methacrylate (MMA), 2-hydroxyethyl methacrylate (HEMA), acryloyloxyundecyltriethyl ammonium bromide (AUTEAB), ethylene glycol dimethacrylate (EGDMA), ammonium persulfate (APS), N,N,N′N′-tetramethylethylene diamine (TMEDA).…”

Section: Novel Low Fouling Membranementioning

confidence: 99%

Novel low-fouling membrane bioreactor (MBR) for industrial wastewater treatment

Deowan

Galiano

Hoinkis

et al. 2016

Journal of Membrane Science

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a b s t r a c tA novel antifouling coating of ultrafiltration (UF) commercial membranes, based on a polymerisable bicontinuous microemulsion (PBM) technique, was developed and tested for the first time in a membrane bioreactor (MBR) using an artificial model textile dye wastewater and compared with a commercial uncoated UF membrane. The results showed that the commercial MBR module faced severe fouling problems whereas the novel coated PBM MBR module reduced the fouling significantly. The analysis of fouling rate using a resistance model confirms that PBM coated membrane has a higher antifouling effect. The antimicrobial properties of the PBM membrane contributed by polymerisable cationic surfactant acryloyloxyundecyltriethylammonium bromide (AUTEAB) guaranteed an anti-biofouling effect preventing the growth of microorganisms on the membrane surface. In addition, the PBM MBR module showed 10 71% higher blue dye removal efficiency and a similar rate of COD removal efficiency of about 957 1% compared to commercial module. However, water permeability was slightly lower due to extra resistance of the PBM coating. Root mean squared (RMS) roughness measurement and analysis of AFM images confirmed that the stable novel membrane coating still existed and showed antimicrobial effect even after 105 days of operation. The results obtained demonstrated the potential of the low fouling PBM membrane.

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Section: Novel Low Fouling Membranementioning

confidence: 99%

Novel low-fouling membrane bioreactor (MBR) for industrial wastewater treatment

Deowan

Galiano

Hoinkis

et al. 2016

Journal of Membrane Science

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“…For each set of measurements 100 particle -surface interaction events were recorded, with each measurement being part of a 10 x 10 array separated by 1 μm in the x and y directions, to ensure that all measurements were taken from different locations on the sample surface. From features of the force-distance curves, the adhesion force for each interaction was measured and mean values for each surface of interest were calculated [12,13].…”

Section: Characterization Techniquesmentioning

confidence: 99%

Theoretical and Experimental Characterization of Efficient Anti-Dust Coatings under Desert Conditions

Isaifan¹,

Johnson²,

Mansour³

et al. 2018

JTFR

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Transparent titania coatings have self-cleaning and anti-reflection properties (AR) that are of great importance in optical and solar applications. In this work, an efficient and easy to scale up adsorptive self-assembly process is used to coat glass substrates with two TiO2 nanocolloids (TC-1 and TC-2) prepared via polyol method. TEM images of the nanoparticles show an average particle size of 2.6 and 167.7 nm of TC-1 and TC-2, respectively. The theoretical values for the coating thickness as well as for the antireflective index were compared with the experimental values obtained via elipsometer measurements. The self-cleaning properties were investigated by optical microscopy, atomic force microscopy, contact angle, surface tension and UV-vis spectroscopy. The optical images show 56% reduction of dust deposition rate with lower adhesion force over the best performing coated surfaces TC-1 compared with bare glass substrates and TC-2 after 7 days of soiling.

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“…(2016) [1][2][3][4][5][6][7][8][9][10][11][12][13][14] www.deswater.com doi: 10.1080/19443994.2016.1178603 ion separation and water recovery, especially due to ineluctable membrane fouling, are observed.…”

Section: Desalination and Water Treatmentmentioning

confidence: 99%

“…The application of membrane filtration to separate inorganic salt and reject natural organic matter (NOM) has gained momentum in recent years [1][2][3]. Given the relatively high permeate flux, low operation pressure and agents, application fields of nanofiltration (NF) process have become broader.…”

Section: Introductionmentioning

confidence: 99%

The synergistic effect of organic foulants and their fouling behavior on the nanofiltration separation to multivalent ions

Gao

Sheng

Cao

et al. 2016

Desalination and Water Treatment

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A B S T R A C TThis work aimed to determine the effect of organic foulants and fouling behavior on separation of multi-ions for nanofiltration (NF) membrane. Three model organic foulants (bovine serum albumin, lysozyme, and humic acid) were selected and studied in depth. The rejections of mono-and di-anions by virgin membrane varied with different organic foulants because of foulant-enhanced co-ion competition. Subsequent multi-ions separations by fouled membranes were different due to the zeta potential and structure of the fouling cake. In contrast to the single protein system, Cl − and SO 2À 4 rejection was reduced by HA fouled membrane. However, with added proteins in the HA solution, mixed systems experienced decreasing Cl − rejection and increasing SO 2À 4 rejection. In addition, solution chemistry (solution pH, ionic strength, and Ca 2+ ) had marked effect on the cake layer composition, likely due to the changing interaction between foulant and foulant, as well as between foulant and NF membrane. The suitable foulant cake structure could result enhanced in multi-ions separation. The synergistic mechanisms of organic foulants and cake were analyzed by calculated cake hydraulic resistance and zeta potential of fouled membranes.

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Adhesion forces between humic acid functionalized colloidal probes and polymer membranes to assess fouling potential

Cited by 35 publications

References 34 publications

Novel low-fouling membrane bioreactor (MBR) for industrial wastewater treatment

Novel low-fouling membrane bioreactor (MBR) for industrial wastewater treatment

Theoretical and Experimental Characterization of Efficient Anti-Dust Coatings under Desert Conditions

The synergistic effect of organic foulants and their fouling behavior on the nanofiltration separation to multivalent ions

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