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Showing papers in "Journal of Colloid and Interface Science in 2005"


Journal ArticleDOI
TL;DR: Analysis of sorption data using a Boyd plot confirms that external mass transfer is the rate limiting step in the sorption process.

1,455 citations


Journal ArticleDOI
TL;DR: The intraparticle diffusion was the best applicable model to describe the adsorption of MB onto JFC and it was found to dependent on contact time, MB concentration and pH.

554 citations


Journal ArticleDOI
TL;DR: Adsorption mechanism studies revealed that the process was complex and followed both surface adsorption and particle diffusion and the rate-controlling parameter and effective diffusion coefficient were determined using the Reichenberg plot.

545 citations


Journal ArticleDOI
TL;DR: Analysis of sorption data using a Boyd plot confirms the particle diffusion as the rate-limiting step for the dye concentration ranges studied in the present investigation (20 to 60 mg/L).

539 citations


Journal ArticleDOI
TL;DR: The results obtained in the present study are in agreement with the results observed for the electronic absorption behavior of silica particles, which was measured by UV-vis spectrophotometry.

475 citations


Journal ArticleDOI
TL;DR: Model predictions are in agreement with spectroscopic evidence, which suggest, especially for the case of arsenate, that mainly bidentate inner-sphere complexes are formed at the goethite-water interface.

461 citations


Journal ArticleDOI
TL;DR: Prepared carbonaceous adsorbent exhibits dye removal efficiency that is about 80-90% of that observed with standard activated charcoal samples and is a suitable alternative to standardactivated charcoal in view of its cheaper cost.

456 citations


Journal ArticleDOI
TL;DR: Iron oxide-coated sand is a suitable adsorbent for reducing As(III) concentration to the limit (50 microg/l) recommended by Indian Standards for Drinking Water.

383 citations


Journal ArticleDOI
TL;DR: The results show that the modified pseudo-first-order kinetic model generates the best agreement with the experimental data for the three single-component adsorption systems.

382 citations


Journal ArticleDOI
TL;DR: Electrophoretic mobility data helped to corroborate the above electrical mechanism as responsible for the size changes, and results were in good agreement with the predictions of gel swelling theory by salt in partially ionized networks.

374 citations


Journal ArticleDOI
TL;DR: The results suggested that natural bentonite is suitable as a sorbent material for recovery and adsorption of metal ions from aqueous solutions.

Journal ArticleDOI
TL;DR: It was found that acid treatment had little effect on carbon textural characteristics but significantly changed the surface chemical properties, resulting in an adverse effect on dye adsorption.

Journal ArticleDOI
TL;DR: Adsorption isotherms at pH 6.0 in the multi-element systems showed that there is competition among various metals for adsorption sites on kaolinite, and an extended constant-capacitance surface complexation model assumed an ion-exchange process below pH 7.0 and the formation of inner-sphere surface complexes at higher pH.

Journal ArticleDOI
TL;DR: The pseudo-second-order model was the best choice among all the kinetic models to describe the adsorption behaviour of RB onto MOMD, suggesting that the advertisersorption mechanism might be a chemisorption process.

Journal ArticleDOI
TL;DR: Dispersions of single-walled carbon nanotubes in various solvents and aqueous surfactant emulsions were investigated to correlate the degree of dispersion state with Hansen solubility parameters.

Journal ArticleDOI
TL;DR: The method that is applied for the sorption/separation of some toxic metals from their solutions, and results showed that the adsorption pattern on the resin followed Freundlich isotherms, is reported.

Journal ArticleDOI
TL;DR: In this work, fir woods and pistachio shells were used as source materials to prepare porous carbons, which were activated by physical (steam) and chemical (KOH) methods and the Freundlich equation gave a better fit to all adsorption isotherms than the Langmuir equation.

Journal ArticleDOI
TL;DR: Chitosan was able to remove the color from synthetic reactive dye wastewater (SRDW) under acidic and caustic conditions and the mechanism of SRDW adsorption was probably by chemical Adsorption for a wide range of pH's and at high temperatures.

Journal ArticleDOI
TL;DR: A new route is developed for coating Fe3O4 nanoparticles with noble metals such as gold or silver as shell for resistant to surface poisoning and yields well-defined core-shell structures of size from 18 to 30 nm.

Journal ArticleDOI
TL;DR: The crystallization and prevention of supercooling of the microcapsules are studied using differential scanning calorimetry (DSC) and wide-angle X-ray diffraction and there are multiple peaks on the DSC cooling curves that are attributed to liquid-rotator, rotator-crystal, and liquid- Crystal transitions.

Journal ArticleDOI
TL;DR: The high-surface-area activated carbons were demonstrated to be promising adsorbents for pollution control and for other applications.

Journal ArticleDOI
TL;DR: The results indicate that the PAA oligomers promoted the nucleation and inhibited the growth of the magnetic iron oxide, and the average diameter of each individual Fe3O4 particle was smaller than 10 nm, which presents an efficient way to prepare a stable aqueous nanomagnetite dispersion.

Journal ArticleDOI
TL;DR: Analysis of obtained results shows that the concentration polarization of studied membranes characterized by the potential drop and the rate of water dissociation at the interface is mainly governed by the properties of their surfaces.

Journal ArticleDOI
TL;DR: Drop impacts onto dry walls and liquid films at low impact angles and low normal Weber numbers are experimentally investigated, yielding both qualitative and quantitative information about the impact.

Journal ArticleDOI
TL;DR: Bottom ash, a power plant waste, and de-oiled soya, an agricultural waste material, were employed for the removal and recovery of Quinoline Yellow, a water-soluble dye and Langmuir and Freundlich adsorption isotherm models are used to calculate thermodynamic parameters and also to suggest a plausible mechanism of the ongoing adsorbent processes.

Journal ArticleDOI
TL;DR: The feasibility of electrostatically extracting and accelerating ions from room temperature ionic liquids in a high vacuum environment is investigated using externally wetted emitters similar to those manufactured for liquid metal ion sources, made out of tungsten wire and electrochemical treated to produce a sharp tip and to increase surface wettability.

Journal ArticleDOI
TL;DR: This work presents various procedures to synthesize dodecanethiol-capped silver NPs, all of them based on a two-phase liquid-liquid method.

Journal ArticleDOI
TL;DR: Results suggest that the main driving forces for CMC adsorption on talc are a combination of electrostatic interaction and hydrogen bonding rather than hydrophobic force.

Journal ArticleDOI
TL;DR: This research synthesized and modified the hydroxyapatite nanorod surface with monolayers of surfactants to create specific surface characteristics which will allow the nanorods to self-assemble into an enamel prism-like structure at a water/air interface.

Journal ArticleDOI
TL;DR: A novel type adsorbent prepared by in situ precipitation of Fe(OH)3 on the surface of activated Al2O3 as a support material proved to be appropriate in solutions and low waste technology for removal of arsenic from drinking water can be developed.