Physico-chemical study of fouling mechanisms of ultrafiltration membrane on Biwa lake (Japan)

Khatib, Khalid; Rose, Jérôme; Barrès, Odile; Bottero, Jean‐Yves

doi:10.1016/s0376-7388(96)00353-5

Cited by 40 publications

(16 citation statements)

References 13 publications

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“…That coagulation of colloidal suspensions affects the extent of membrane fouling has been well documented (16)(17)(18)(19)(20)(21)(22)(23)(24) with a variety of factors shown (or proposed) to account for the observed effects of coagulation on membrane flux. Thus, Kim et al (18) found that aggregation of silver particles lowered the extent of fouling of ultrafiltration membranes and concluded that nonaggregated silver particles caused significant flux decline because of pore blocking by the individual particles whereas aggregation retained the particles in a surface cake.…”

Section: Membrane Filtrationmentioning

confidence: 99%

“…Many investigators have recognized the importance of aggregation conditions either in suspension or at the membrane surface to cake properties (13)(14)(15)(16)(17)(18)(19)(20)(21)(22)(23). Indeed, some workers have recently suggested that the fractal properties of aggregates formed may be influencing membrane filtration behavior (24). No studies however have been undertaken where the fractal properties of aggregates formed are carefully controlled and the implications to membrane filtration investigated.…”

Section: Introductionmentioning

confidence: 99%

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Colloidal Fouling of Ultrafiltration Membranes: Impact of Aggregate Structure and Size

Waite

Schäfer

Fane

et al. 1999

Journal of Colloid and Interface Science

145

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A close coupling between the structure and size of hematite flocs formed in suspension and the permeability of the cake that accumulates on ultrafiltration membranes is observed. Specific resistances of cakes formed from flocs generated under diffusion limited aggregation (DLA) conditions are at least an order of magnitude lower than cakes formed from flocs generated under reaction limited aggregation (RLA) conditions. Similar effects are observed whether the aggregation regime is controlled by salt concentration, pH or added organic anions. This dramatic difference in cake resistance is considered to arise from the size and fractal properties of the hematite assemblages. The ease of fluid flow through these assemblages will be influenced both by the fractal dimension of the aggregates and by their size relative to primary particle size (since for fractal aggregates, porosity increases as the size of the aggregate increases). The size and strength of aggregates are also important determinants of the relative effects of permeation drag, shear induced diffusion and inertial lift and result, in the studies reported here, in relatively similar rates of particle deposition for both rapidly and slowly formed aggregates. The results presented here suggest that control of cake permeability (and mass) via control of aggregate size and structure is an area with scope for further development though the nature and extent of compaction effects in modifying the fractal properties of aggregates generated in suspension requires attention.

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Section: Membrane Filtrationmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Colloidal Fouling of Ultrafiltration Membranes: Impact of Aggregate Structure and Size

Waite

Schäfer

Fane

et al. 1999

Journal of Colloid and Interface Science

145

View full text Add to dashboard Cite

show abstract

“…Further, the iron oxide particles can be regenerated by exposure to a base. Some research has been done on using modified clays 79 or powdered ion exchange resins to remove specific compounds, and this area deserves more research as well.…”

Section: Hybrid Membrane Processes–reactorsmentioning

confidence: 99%

Committee Report: Membrane processes

1998

Journal AWWA

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Researchers are tackling issues related to larger modules and plants, pretreatment, permitting, and disposal of residuals. This review focuses on membrane technology research needs in the context of drinking water treatment. It considers practical issues like membrane piloting, scale‐up, residuals discharge, and costs, as well as more fundamental issues like membrane polymers, surface characterization, biofouling, and modeling of the transport of dissolved and particulate species in membrane systems. It is concluded that because the period since this committee's last report has been a fertile one for research, many new questions have arisen on both applied and fundamental issues in the development, use, and understanding of membrane processes in drinking water treatment.

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“…One of the basic targets of membrane engineering is imparting surface hydrophilicity to membrane surface. Hydrophilicity helps adhering a thin film of water to the membrane surface, thereby reducing the extent of organic fouling . Hydrophilicity can be induced to a membrane surface by polymer blending, surface reaction, plasma treatment, addition of inorganic materials, etc.…”

Section: Introductionmentioning

confidence: 99%

Solvent effect and macrovoid formation in cellulose acetate phthalate (CAP)–polyacrylonitrile (PAN) blend hollow fiber membranes

Roy

Bhunia

2016

J of Applied Polymer Sci

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The interactions which govern the morphology of blend hollow fiber membranes is explored in detail in the present work. A hydrophilic (cellulose acetate phthalate) and a relatively hydrophobic polymer (polyacrylonitrile, critical surface tension 47.0 mJ/m 2 ) blend in three solvents, viz., n-methylpyrrolidone (NMP), dimethyl formamide (DMF), and dimethylsulfoxide (DMSO), has been selected as an example to understand the polymeric blend-solvent and nonsolvent interactions. The deviation intrinsic parameter (D h ½ ) is estimated as well as cloud point, linearized cloud point (LCP), and Fourier transform-infrared (FT-IR) analysis have been performed for the blend membranes. The analysis yields that D h ½ is negative for both DMF and NMP indicating miscibility, whereas for DMSO it is positive indicating immiscibility. Cloud point and LCP analysis too reveal DMSO to be the poorest solvent and liquid-liquid demixing is the governing phenomenon for the phase inversion. In depth interaction is conducted with help of FT-IR spectra. The higher red shift of >C@O (1747 to 1665 cm 21 ) after complete phase inversion indicates stronger interaction in DMF and NMP, whereas, no shift in >C@O stretching in DMSO indicates weak or no interaction. This reveals that polymer blend-solvent interaction is weak in case of DMSO than DMF or NMP. These observations manifest in DMSO membranes being most porous, with highest permeability and molecular weight cut off with poor tensile strength. On the other hand, NMP and DMF hollow fiber membranes yields denser structure with better mechanical properties.

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Physico-chemical study of fouling mechanisms of ultrafiltration membrane on Biwa lake (Japan)

Cited by 40 publications

References 13 publications

Colloidal Fouling of Ultrafiltration Membranes: Impact of Aggregate Structure and Size

Colloidal Fouling of Ultrafiltration Membranes: Impact of Aggregate Structure and Size

Committee Report: Membrane processes

Solvent effect and macrovoid formation in cellulose acetate phthalate (CAP)–polyacrylonitrile (PAN) blend hollow fiber membranes

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