Showing papers in "Journal of Colloid and Interface Science in 2006"

TL;DR: This paper seeks to offer a status report on the current approaches to wetting dynamics, to briefly review each of theCurrent approaches, to illustrate their successes and limitations as revealed by experiment and simulation, and to suggest ways in which the different aspects of wetts dynamics might be investigated in the future.

TL;DR: An "extended DLVO" approach that includes Lifshitz-van der Waals, Lewis acid-base, and electrostatic double layer interactions is used to describe interaction energies between spherical particles and rough surfaces to demonstrate that nanometer scale surface roughness features can produce a distribution of interaction energy profiles.

TL;DR: An attempt has been made here to evaluate the deleterious effect of temperature on shear strength of carbon/epoxy and glass/ep oxygen composites during hygrothermal conditionings and the effectiveness of the relaxation process in the nullification of environmentally-induced damage in the composites.

TL;DR: The adsorption of uranium(VI) from aqueous solutions onto activated carbon using Freundlich, Langmuir, and Dubinin-Radushkevich (D-R) models shows that the sorption is physical in nature and the feasibility of the process is shown.

TL;DR: Delta a values have the prospect for use as another index for the estimation of polarity of micellar interior of the probe (pyrene) from the measurements of UV absorption of pyrene in surfactant solution.

TL;DR: The experimental results on the synthesis of flexible and superhydrophobic silica aerogels using methyltrimethoxysilane (MTMS) precursor by a two-step (acid-base) sol-gel process followed by the supercritical drying, are reported.

TL;DR: The sorption capacity of black liquor lignin is higher than many other adsorbents/carbons/biosorbents utilized for the removal of Cu( II) and Cd(II) from water/wastewater in single and multi-component systems.

TL;DR: Spirogyra can be used as an efficient and economic biosorbent material for the removal and recovery of toxic heavy metals from polluted water with the advantages of high metal biosorption capacity and satisfactory recovery of Cu(II).

TL;DR: Investigation and development of cheap adsorption methods for color removal from wastewater using waste materials activated carbon and activated rice husk-as adsorbents using Safranin-T and Langmuir and Freundlich adsorbent models is aimed.

TL;DR: It is shown that the optimal adsorption condition for all the activated carbons tested corresponds to solution pH values not higher than the pH(pzc) of the adsorbents, which may be interpreted by taking into account the electrostatic forces present.

TL;DR: The removal of methylene blue in water with the superabsorbent hydrogel (SH) formed by modified gum arabic, polyacrylate, andpolyacrylamide was investigated, and the SH exhibited excellent performance in MB absorption.

TL;DR: Paraffin oil-in-water nano-emulsions stabilized by Tween 80/Span 80 were prepared using the emulsion inversion point method at different emulsification temperatures and revealed a negative value of the zeta potential, which was strongly dependent on the pH of the systems.

TL;DR: The continuous column method was used in order to evaluate the feasibility to use the clay in wastewater purification systems and it is possible to conclude that the vermiculite has good potentialities for cost-effective treatments of metal-contaminated wastewaters.

TL;DR: The retentive-force factor relating surface-tension forces to contact-angle hysteresis is reliably determined and the Bond number of a critical drop is found to be constant for a given surface and liquid.

TL;DR: The effect of pH on phosphate adsorption from seawater showed that the uptake of phosphate increased with an increase in pH up to 6, and then decreased sharply with a further increase in acidity of the solution.

TL;DR: The CD values calculated with MO/DFT are not particularly sensitive to the precise Fe-octahedral geometry, which suggests that a calculated CD is a reasonable approximation in ion adsorption modeling for ill-defined Fe-oxides like HFO and natural Fe oxide materials of soils.

TL;DR: The results are consistent with a mechanism that involve a fast adsorption followed by a slow diffusion into pores, and are not consistent with surface precipitation of iron phosphate.

TL;DR: It was found that the adsorption capacity of the synthesised adsorbents depends on the preparation conditions such as NaOH:fly-ash ratio and fusion temperature with the optimal conditions being at 1.2:1 weight ratio of Na: fly-ash at 250-350 degrees C.

TL;DR: Kinetics analysis indicates that the photocatalytic decolorization rates of the dye can be approximated by a pseudo-first-order model.

TL;DR: The results from DFT calculations and ab initio molecular-dynamics simulations of formic acid adsorption onto TiO2 are compared and match well with the experimental IR measurements, supporting the bridge-binding geometry of carboxylic-acid adsorb strongly to the surfaces in a bridge-coordinating mode.

TL;DR: The overall findings were that selenite forms a mixture of outer-sphere and inner-spheres bidentate-binuclear (corner-sharing) surface complexes on HAO, selenate forms primarily outer-Sphere surface complex onHAO, and on corundum selenates forms outer- sphere surface complexes at pH 3.5 but inner- Spheres monodentate surface complex at pH 4.5 and above.

TL;DR: This paper investigates adhesion as a geometrical effect taking into account both the particle size and the size of the surface features using blunt model particles on surfaces up to 10 nm root-mean-square (RMS) roughness.

TL;DR: It was concluded that ZFA could be used in simultaneous removal of NH4+ and phosphate at low concentrations with presaturation by an appropriate cation such as Al3+ through salt treatment.

TL;DR: The formation and stability of liquid paraffin-in-water emulsions stabilized solely by positively charged plate-like layered double hydroxides (LDHs) particles were described here and the possible stabilization mechanisms were put forward: the decrease of particle zeta potential leads to particle adsorption at the oil-water interface and the formation of a network of particles at the interface.

TL;DR: XPS and EXAFS analyses clearly show the interactions of the ionic liquid with the metal surface demonstrating the formation of an ionic Liquid protective layer surrounding the iridium nanoparticles.

TL;DR: Retention selectivity sequences indicate that, in most of the soils, Pb is the preferred retained metal, followed by Cr, and the last metals in these sequences are Ni, Cd, and Zn.

TL;DR: It is found that when the area fraction of the topographical features and the intrinsic contact angle for a flat surface are large, the Cassie state is favored, but it can be either the metastable or stable state.

TL;DR: It is shown that such a gel can also form in the absence of asphaltene in the oil phase, and the stability of emulsions was found to increase with both the gel strength and the glass transition temperature of the gel.

TL;DR: It was reached that modification of bentonite and illite with nonylammonium chloride increased the adsorption capacity for boron sorption from aqueous solution.

TL;DR: A pseudo-second order kinetic model was used for analysing the kinetic data, and it was concluded that adsorption of atrazine was controlled by a film diffusion mechanism.