Influence of surface interaction on transfer during colloid ultrafiltration

Bacchin, Patrice; Aimar, Pierre; Sánchez, V.

doi:10.1016/0376-7388(95)00279-0

Cited by 98 publications

(50 citation statements)

References 16 publications

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“…A very important mechanism is the electrical double-layer interaction between membrane and dispersed particles (Bowen et al 1999). Another is the nano-filtration mechanism (Bacchin et al 1996). The work by Doucet et al (2004) showed that CFF fractionation involves other factors besides size.…”

Section: Chemical Analysismentioning

confidence: 99%

Size fractionation and characterization of nanocolloidal particles in soils

Zhi-yun

Luo

et al. 2008

Environ Geochem Health

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A protocol was developed to fractionate soil particles down to the nanocolloid scale by combining sieving, sedimentation, centrifugation, and cross-flow filtration (CFF). The validity of the method and the performance of the CFF system were tested by characterizing fractions using laser granulometry, electron microscopy, and chemical analysis. The 0.1-lm-pore-size membrane CFF system effectively retained nanocolloids (\0.1 lm) as shown by laser granulometry and observed directly by transmission electron microscopy. However, environmental scanning electron microscopy images of freeze-dried colloids were very different from their TEM counterparts, suggesting that sample preparation influenced microscopy imaging. Chemical analysis of Cu, Cd, and organic carbon in each fraction showed that the concentrations of these components increased as particle size decreased, indicating colloids and nanocolloids play an important role in retaining trace metals. Particle-size fractionation combined with chemical analysis and electron microscopy can provide insight into the nature and properties of nanocolloids in soil.

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Section: Chemical Analysismentioning

confidence: 99%

Size fractionation and characterization of nanocolloidal particles in soils

Zhi-yun

Luo

et al. 2008

Environ Geochem Health

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“…While issues such as aggregate restructuring and compression on cake formation must be addressed, this relationship between aggregation conditions and resulting aggregate structure opens the way to design of cake properties through control of suspension conditions. 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).…”

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

144

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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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“…The irst theoretical model that shed light on membrane transport phenomena of colloidal particles was elaborated by the research groups of Field et al [3,32], Bacchin et al [33], and Mäntäri and Nystörm, [34]. The concept of the critical lux, as the lux which can be successfully atained by a given membrane without incurring in fouling formation during operation time, was explained and proven by these scientists for MF membranes.…”

Section: Microiltration and Ultrailtration Membranesmentioning

confidence: 99%