Removal of Colloidal Particles from Quartz Collector Surfaces As Stimulated by the Passage of Liquid−Air Interfaces

Suarez, CG; Mei, HC van der; Busscher, Hj

doi:10.1021/la981608c

Cited by 68 publications

(74 citation statements)

References 32 publications

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“…They found that colloid detachment from the solid surface was more at lower interface velocity. A similar observation has been made for particle detachment by air-bubble moving at higher speed (> 8cmh −1 ) [30,31].…”

Section: Attachment At the Liquid-gas Interfacessupporting

confidence: 82%

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Geological Disposal of Nuclear Waste: Fate and Transport of Radioactive Materials

Sharma¹

2012

Nuclear Power- Practical Aspects

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Section: Attachment At the Liquid-gas Interfacessupporting

confidence: 82%

“…These are interception of the particle, attachment or thinning of the liquid film in between the particle and the liquid-gas interface, and stabilization of the particle on the liquid-gas interface [22,30,67,70]. The total detachment probability (P det ) is defined as [22]:…”

Section: Attachment At the Liquid-gas Interfacesmentioning

confidence: 99%

Geological Disposal of Nuclear Waste: Fate and Transport of Radioactive Materials

Sharma¹

2012

Nuclear Power- Practical Aspects

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“…The probability of collision of microbubbles with bacterial cells or entities depends on the cross-sectional area exposed to the flow and is evidently larger for adhering coaggregates than for single bacteria. In the studies by Gómez-Suárez et al (7)(8)(9), the collision efficiency was invariably 1, because air-liquid interfaces fully spanning the width of their parallel plate flow chamber were used. For microbubbles the situation is different, however.…”

Section: Discussionmentioning

confidence: 99%

“…1). A detailed analysis of the surface tension forces causing this detachment was first given in the field of semiconductors (12,13), and later the method was successfully used to detach colloidal particles (7,15) and bacteria (8) from surfaces in a parallel plate flow chamber. Surface tension detachment forces range from 10 Ϫ9 to 10 Ϫ7 N, depending on the surfaces involved, and are several orders of magnitude larger than gravitational, buoyancy, and hydrodynamic forces acting on microorganisms (15).…”

mentioning

confidence: 99%

Influence of Fluid Shear and Microbubbles on Bacterial Detachment from a Surface

Sharma

Gibcus

Mei

et al. 2005

Appl Environ Microbiol

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Prevention of microbial adhesion and detachment of adhering microorganisms from surfaces is important in many environmental, industrial, and medical applications. Fluid shear is an obvious parameter for stimulating microbial detachment from surfaces, but recently it has been pointed out that a passing air-liquid interface also has potential in stimulating microbial detachment. In the present study, the ability of microbubbles to stimulate detachment of bacterial strains from a glass surface is compared with the effects of fluid flow. Adhesion and detachment of Actinomyces naeslundii T14V-J1, Streptococcus oralis J22, and their coadhering aggregates were studied on glass, mounted in a parallel plate flow chamber. High fluid wall shear rates (11,000 to 16,000 s ؊1 ) were established in a laminar flow regime in the absence and presence of microbubbles. Wall shear rates stimulated detachment ranging from 70% to 30% for S. oralis and A. naeslundii, respectively. Coadhering aggregates were detached up to 54%. The presence of microbubbles in the flow increased the detachment of A. naeslundii within 2 min of flow from 40% in the absence of microbubbles to 98%, while detachment of neither S. oralis nor coadhering aggregates was affected by the presence of microbubbles. In summary, extremely high fluid flows can be effective in stimulating microbial detachment, depending on the strain involved. The addition of microbubbles to the flow allows the detachment of tenaciously adhering bacteria not detached by flow alone, but not of adhering coaggregates.

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“…These processes have only recently been fully understood and need to be introduced into microbiology in order to stimulate methodological advances in the field. Detachment of adhering polystyrene particles by the passage of air bubbles has been demonstrated to be more efficient when (i) the velocity of the passing air bubble decreases (19,20), (ii) the air-liquid interfacial tension increases (19,20), (iii) particle size decreases (17), (iv) the substratum surface is more hydrophobic (19), and (v) the substratum surface is negatively charged (18).…”

mentioning

confidence: 99%

Analysis of Bacterial Detachment from Substratum Surfaces by the Passage of Air-Liquid Interfaces

Gómez‐Suárez

Busscher

Mei

2001

Appl Environ Microbiol

187

150

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A theoretical analysis of the detachment of bacteria adhering to substratum surfaces upon the passage of an air-liquid interface is given, together with experimental results for bacterial detachment in the absence and presence of a conditioning film on different substratum surfaces. Bacteria (Streptococcus sobrinus HG1025, Streptococcus oralis J22, Actinomyces naeslundii T14V-J1, Bacteroides fragilis 793E, and Pseudomonas aeruginosa 974K) were first allowed to adhere to hydrophilic glass and hydrophobic dimethyldichlorosilane (DDS)-coated glass in a parallel-plate flow chamber until a density of 4 ؋ 10 6 cells cm ؊2 was reached. For S. sobrinus HG1025, S. oralis J22, and A. naeslundii T14V-J1, the conditioning film consisted of adsorbed salivary components, while for B. fragilis 793E and P. aeruginosa 974K, the film consisted of adsorbed human plasma components. Subsequently, air bubbles were passed through the flow chamber and the bacterial detachment percentages were measured. For some experimental conditions, like with P. aeruginosa 974K adhering to DDS-coated glass and an air bubble moving at high velocity (i.e., 13.6 mm s ؊1 ), no bacteria detached upon passage of an air-liquid interface, while for others, detachment percentages between 80 and 90% were observed. The detachment percentage increased when the velocity of the passing air bubble decreased, regardless of the bacterial strain and substratum surface hydrophobicity involved. However, the variation in percentages of detachment by a passing air bubble depended greatly upon the strain and substratum surface involved. At low air bubble velocities the hydrophobicity of the substratum had no influence on the detachment, but at high air bubble velocities all bacterial strains were more efficiently detached from hydrophilic glass substrata. Furthermore, the presence of a conditioning film could either inhibit or stimulate detachment. The shape of the bacterial cell played a major role in detachment at high air bubble velocities, and spherical strains (i.e., streptococci) detached more efficiently than rod-shaped organisms. The present results demonstrate that methodologies to study bacterial adhesion which include contact with a moving air-liquid interface (i.e., rinsing and dipping) yield detachment of an unpredictable number of adhering microorganisms. Hence, results of studies based on such methodologies should be referred as "bacterial retention" rather than "bacterial adhesion".

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Removal of Colloidal Particles from Quartz Collector Surfaces As Stimulated by the Passage of Liquid−Air Interfaces

Cited by 68 publications

References 32 publications

Geological Disposal of Nuclear Waste: Fate and Transport of Radioactive Materials

Geological Disposal of Nuclear Waste: Fate and Transport of Radioactive Materials

Influence of Fluid Shear and Microbubbles on Bacterial Detachment from a Surface

Analysis of Bacterial Detachment from Substratum Surfaces by the Passage of Air-Liquid Interfaces

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