Showing papers in "Journal of Colloid and Interface Science in 2004"

TL;DR: These nontoxic nanomaterials, which can be prepared in a simple and cost-effective manner, may be suitable for the formulation of new types of bactericidal materials.

TL;DR: The rates of reduction of the metal ions by Neem leaf extract are much faster than those observed by us in earlier studies using microorganisms such as fungi, highlighting the possibility that nanoparticle biological synthesis methodologies will achieve rates of synthesis comparable to those of chemical methods.

TL;DR: The results show that natural zeolites hold great potential to remove cationic heavy metal species from industrial wastewater.

TL;DR: An extended Langmuir model has been used to predict the isotherm data for the binary systems using the single component data, and the linear transform model provided the highest R(2) regression coefficient with the Redlich-Peterson model.

TL;DR: An inexpensive and effective adsorbent was developed from bagasse fly ash, obtained from a sugar industry, for the dynamic uptake of lead and chromium, and found to be exothermic in nature.

TL;DR: Quantitative desorption of Pb(II) from CSC was found to be 75% which facilitates the sorption of metal by ion exchange and indicates the spontaneous and endothermic nature of adsorption.

TL;DR: Al3+-exchanged zeolite was found to be superior to La3+ -exchangedZeolite in fluoride uptake within the tested concentration range, and factors from the solution chemistry that affected fluoride removal from water were the solution pH and bicarbonate content.

TL;DR: It was shown that the adsorption of larger molecules such as tannic acid (MW, 1700 g mol(-1)), humic acid, and RR222 from water onto composite beads was better described by the pseudo-first-order kinetic model.

TL;DR: The results indicate that Na-bentonite and DTMA- bentonite could be employed as low-cost alternatives to activated carbon in wastewater treatment for the removal of color which comes from textile dyes.

TL;DR: This paper presents a novel one-step method for preparing of copper nanofluids by reducing CuSO(4).5H(2)O with NaH( 2)PO(2).

TL;DR: The effect of activation temperature on the textural and chemical properties of activated carbons prepared from pistachio-nut shells by potassium hydroxide activation was studied.

TL;DR: The reliability of the method has been demonstrated by the fact that the ideal contact angles of all surfaces, as calculated from the Wenzel equation using the measured apparent contact angles, came out to be practically identical.

TL;DR: It was found that the exchange processes might induce an increase or decrease in the surface area, pore size, pores volume, and surface fractal dimension D of montmorillonite, depending on the size, the molecular arrangement, and the degree of hydration of the exchanged ion in the clay.

TL;DR: An electrical triple-layer model (TLM) to describe the electrochemical properties of clay minerals shows good agreement for a reasonable choice of parameters close to the a priori values determined from quartz and gibbsite.

TL;DR: Comparison of the proton NMR spectroscopic signatures from the tryptophan-protected gold nanoparticles obtained by the two processes indicated that the indole group in tryPTophan is responsible for reduction of the aqueous chloroaurate ions.

TL;DR: A large variety of materials, resulting from a limited coalescence process, were produced in a very wide droplet size range, from micrometers to centimeters, and exhibit original properties compared with surfactant-stabilized emulsions: outstanding stability with respect to coalescence and unusual rheological behavior.

TL;DR: P pH effect and desorption studies showed that adsorption occurred by both ion exchange and chemisorption mechanisms, and was found to be spontaneous and endothermic.

TL;DR: In this paper, the average size of the silver nanoparticles decreases with increasing the amount of polyvinyl pyrrolidone (PVP) in the solution, but increases with increasing its molecular weight.

TL;DR: The herbaceous peat collected from Gavurgolu peatlands was utilized as an adsorbent for the removal of copper (II) ions from aqueous solution and it was determined that adsorption isotherm followed both Freundlich and Langmuir.

TL;DR: Investigating the effect of sonication on the particle size and structure of a well-crystallized (KGa-1) kaolinite from Georgia showed that particle-size reduction can be controlled through different variables such as power of ultrasonic processor, amount of sample, and time of treatment.

TL;DR: The ability of amphiphilic compounds to self-assemble into well-defined structures can be taken advantage of for synthesis of inorganic materials with nanometer dimensions with special attention put on three areas: microemulsion-based synthesis of nanoparticles, preparation of mesoporous materials from surfactant templates, and surfactants-mediated crystallization.

TL;DR: The adsorption behavior of Hg(II, Pb(II), and Cd(II) on Duolite C-433 synthetic resin has been determined at different temperatures by batch process and various thermodynamic parameters have been calculated in order to predict the nature of sorption.

TL;DR: A mechanism of the formation of the nest-like morphology was discussed based on nonaqueous solution reactions, nucleation, and crystal growth during the CBD process.

TL;DR: D dye/chitosan interaction showed favorable enthalpic and entropic processes, reflecting thermodynamic stability of the formed complex, while dye/ chitin interaction showed an exothermicEnthalpic value and a highly nonfavorable entropics effect, resulting in a nonspontaneous thermodynamic system.

TL;DR: The results obtained by controlling the synthesis procedure suggest that different arrangements of DDS molecules in the LDH interlayers can be obtained and optimized for the sorption of specific sorbates.

TL;DR: A self-consistent method is used to derive the Lennard-Jones surface law from the interatomic Lennard -Jones potential, and the equilibrium distance z0 values are obtained for various materials.

TL;DR: The results show the contact-angle variation along the circumference of a drop to be best fit by a third-degree polynomial in the azimuthal angle, which is valuable in modeling drop shape.

TL;DR: Stable CoFe(2)O(4) nanoparticles have been obtained by co-precipitation using a microwave heating system and AC magnetization data indicate the presence of magnetic interactions between the nanoparticles.

TL;DR: It was concluded that it is possible to separate different electrolytes using PANI composite ion-exchange membranes to observe the selectivity of these membranes for different types of counterions.

TL;DR: The adsorption equilibrium of naphthalene on zeolite from water-butanol solution, which is a surfactant-enriched scrubbing liquid, was successfully evaluated by Langmuir, Freundlich, and linear isotherms and the pseudo-second-order equation successfully predicted the adsorptive process.