On colloidal particle sorption onto a stagnant air–water interface

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

“…In a direct visualization experiments, it had been found that a significant number of colloids were detached from initially dried solid surfaces by the moving liquid-gas interface and remain attached to the liquid-gas interfaces (Fig 5) [70]. The irreversible nature of colloid attachment from the liquid-gas interface has been observed earlier, which validate the strength of moving liquid-gas interface [1,80].…”

Processes in Pathogenic Biocolloidal Contaminants Transport in Saturated and Unsaturated Porous Media: A Review

“…Although there is a substantial body of published research on biocolloidal transport in the subsurface, much of it focuses on transport in the saturated zone (e. g. Bales et al 1989;Chu et al 2000;Chu et al 2001;Fontes et al 1991;Harvey 1997;Hornberger et al 1992;McCarthy and McKay 2004;McKay et al 1993;Sen and Khilar 2006;Sen and Khilar 2009;Sen et al 2004) rather than on transport in the unsaturated vadoze zone. In the unsaturated porous media, the additional mechanisms (compared with saturated zone) for colloid transport are reported as: colloid captured at the liquid-gas interface (Crist et al 2004;2005;Gao et al 2008;Zevi et al 2005), colloid capture due to straining (Wan and Tokunaga 1997;Bradford et al 2006, colloid captured at solid-liquid-gas interface (Williams and Berg 1992;Abdel-Fattah and El-Genk 1998;Sirivithayapakorn and Keller 2003;Lazouskaya and Jin 2006) and colloid storage in immobile zone (Cherrey et al 2003;Gamerdinger and Kaplan 2001;Gao et al 2006), respectively.…”

“…The irreversible attachment of colloids at AWI is either by capillary or by electrostatic forces (Schafer et al 1998;Wan and Wilson 1994). While the DLVO theory has been successfully used to describe the interactions between colloidal particles, it does not provide a meaningful description of colloid/biocolloid-AWI interactions (Abdel-Fattah and EL-Genk 1998;Sirivithayapakorn and Keller 2003). A range of non-DLVO forces have been considered in the literature in order to describe colloid/biocolloid-AWI interactions more adequately.…”

Automated Video Microscopic Imaging and Data Acquisition System for Colloid Deposition Measurements

“…The air bubble, which is comparable to the cell volume, fills the entire cell except for a thin liquid film that separates the bubble from the inner surfaces of the cell. The colloids deposited at these surfaces detach as they are captured irreversibly by the liquidair interface (17,18). As the bubble traverses the cell sweeping its inner surfaces, all previously deposited colloids are detached and carried away by the bubble.…”