Silica is a very interesting system that has been thoroughly studied in the last decades. One of the most outstanding characteristics of silica suspensions is their stability in solutions at high salt concentrations. In addition to that, measurements of direct-interaction forces between silica surfaces, obtained by different authors by means of surface force apparatus or atomic force microscope...

A growing body of experimental evidence suggests that the deposition behavior of microbial particles (e.g., bacteria and viruses) is inconsistent with the classical colloid filtration theory (CFT). Well-controlled laboratory-scale column deposition experiments were conducted with uniform model particles and collectors to obtain insight into the mechanisms that give rise to the diverging deposit...

A realistic statistical-mechanics model is applied to describe the repulsive interaction between charged colloids. The latter, in combination with the long-range van der Waals attraction simulated under excess salt environment, gives rise to a total intercolloidal particle potential showing a clear second potential minimum. Differing from the usual Derjaguin-Landau-Verwey-Overbeek (DLVO) model,...

Little is known about the influence of nanoconfinement on calcium carbonate mineralization. Here, colloidal probe atomic force microscopy is used to confine the calcite-solution interface with a silica microsphere and to measure Derjaguin-Landau-Verwey-Overbeek (DLVO) and non-DLVO forces as a function of the calcium concentration, also after charge reversal of both surfaces occurs. Through the ...

Bulk nanobubbles which are usually observed in pure water have a mean diameter typically around 100 nm. We use combination of physical and chemical techniques to prove the hypothesis that nanoentities stable clusters much smaller nanobubbles. The stability bulk nanobubble is affected by factors such as ionic strength or internal energy system. show on order nm exist cluster form neutral basic m...

The aim of this study was to investigate the importance of surface potential in microbial deposition onto modified granular surfaces. Recent experimental and theoretical work has indicated that surfaces coated with metal oxides and hydroxide rich oxide/hydroxide mixtures ((hydr)oxides) have the potential to increase the capture efficiencies of commercial filtration systems. This study quantitat...

The adhesion of Acidithiobacillus ferrooxidans bacterial cells have been assessed by following the thermodynamic and extended DLVO theoretical approaches. Surface potential, interfacial tension and contact angle parameters that are necessary for the calculation of free energy of adhesion have been determined experimentally. The Hamaker constant involved in the Lifshitz-van der Waals interaction...

We show that the first non-linear correction to the linearised PoissonBoltzman n (or DLVO) theory of effective pair interactions between chargestabilised, co lloidal particles near a charged wall leads to an attractive component of entro pic origin. The position and depth of the potential compare favourably with rec ent experimental measurements 82.70.Dd;64.10th;83.20Di Typeset using REVTEX 1 R...

already been published concerning the use of insoluble polyIn this work, the colloidal stability of a pharmaceutical ethylcelmers as drug vehicles in very different fields, such as ophlulose latex, Aquacoat, is analyzed by means of turbidity measurethalmology (1), immunology (2), or cancer treatment (3, ments. The effects of both electrolyte (KCl, CaCl2 and LaCl3) 4). Although the colloidal beh...