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The electron work function of the ternary alloys K-Cs-Rb has been studied by means of the photoelectric Fowler method in conditions of the ultra-high vacuum. The electron work function polytherms can be described by the linear equations except for the alloy 72.7 at.% Na + 1.3 at.% Cs + 26.0 at.% Rb for which the shape of the temperature dependence of the electron work function slightly changes between...
In present work a new method for determining an activity of components in metallic alloys by their of electron work function of systems — values is proposed.
This work is dedicated to modeling of adsorption processes in plasmonic sensors. We give a generalization of the Lagergren first order reaction kinetic model to the situations where adsorption takes place in multianalyte environment and every analyte obeys one of the following two rules: either it has a small equilibrium constant or its initial number of particles greatly exceeds the number of corresponding...
The model of pressure swing adsorption separation process for CO2 with zeolite molecular sieve is established in this paper. The pressure swing adsorption system of CO2 is simulated with mass, gas and energy balance equations. The CO2 adsorption isotherm is fitted by Dual-site Langmuir equation. The recovery rate, productive rate and energy of the separation process is designed. Finally, the model...
In different kinds of surface-based chemical and biological micro/nanosensors, interpretation of the experimentally obtained data is performed based on approximate solutions for the sensor response, valid for the case of single-analyte samples. A question arises whether or not the approximate models used for experimental data fitting in the case of a single analyte are also applicable for multianalyte...
The present work is aimed at exploring carbon which was prepared by calcination of Cereal By-Product (CBP) and used as adsorbent for the removal of Chromium (VI) from a surface treating industry. The effect of various parameters such as adsorbent dosage, particle size, pH, contact time and stirring speed was studied. As the adsorption process is pH dependent, it showed maximum removal efficiency of...
The task of obtaining the items highly-relevant to a given set of query items is a basis for various applications, such as recommendation and prediction. A family of path-based relevance metrics, which quantify item relevance based on the paths in a given item graph, have been shown to be effective in capturing the relevance in many applications. Despite their effectiveness, path-based relevance normally...
The kinetics which explained the Copper Super-filling by electrodepostition was investigated since the copper deposition became the standard technique for TSV. A simple numerical model is built to explain the copper deposition process. Consider with the effect of the accelerator, a linear equation is built to explain the relationship between the exchange current density and the coverage of accelerator...
The development of shale gas reserves is the current hotspot of oil and gas exploration and development at home and abroad. Correctly estimated reserves of gas reservoir has become increasingly urgent. The estimated of shale gas reservoir dynamic reserves in the past did not consider the influence of adsorbed phase occupies volume. In order to estimate the shale gas reservoir dynamic reserves exactly,...
Stabilized finite element methods application for the solution of of convection — diffusion problems is investigated. Features of algorithms of SUPG and RFB methods are discussed. Restrictions in application of these methods at the solution of filtration and adsorption problems are analyzed.
Adsorption of Remazol Brilliant Blue R (RBBR) by rambutan peel (RP) was examined. The adsorption experiments were carried out under different conditions of initial concentration (25–500 mg/L), solution pH 2–12 and RP dose (0.05–1.2 g). The influence of these parameters on the adsorption capacity was studied using the batch process. RBBR adsorption uptake was found to increase with increase in initial...
Chitosan resin grafted by quercetin (QCR), the adsorbent, was used as for the separation of flavonoids. The optimum conditions were determined by automatic liquid chromatography system. Moreover, the hydrophobic interaction between the flavonoids and QCR could be useful for the effective adsorption and separation.
Carbonized mulch (CM) was used to remove copper (Cu), zinc (Zn) and cadmium (Cd) in solutions and urban road runoff in this study. Parameters investigated included pH, sorbent amount and reaction time. The removal of all three metals by CM was determined by pH and the peak at pH 5.5. The adsorption kinetics of all three metals by CM could meet the pseudo-first-order equation. The adsorption isotherms...
Adsorption of methylene blue (MB) by NaOH-treated rambutan peel (N-RP) was examined. The adsorption experiments were carried out under different conditions of initial concentration (25–500 mg/L), solution pH 2–12 and N-RP dose (0.05–1.0 g). The influence of these parameters on the adsorption capacity was studied using the batch process. MB adsorption uptake was found to increase with increase in initial...
For unsteady-state diffusion, adsorption and a first-order reaction in a slab, cylinder and sphere catalyst, high-order approximations in the form of coupled ordinary differential equations are developed to substitute the exact partial differential equations. An infinite continued fraction is developed, which unifies the exact transfer functions of the three geometries as a function of the shape factor...
The treatment of chromium containing wastewater using flyash and modified flyash as adsorbents was studied. The effects of time, pH, the dosage of absorbents, initial concentration on the removal of Cr (VI) in wastewater were discussed. The results showed that the modified flyash has a better efficiency on the removal of Cr (VI). The removal rate of Cr (VI) is 97.52% under the conditions of the pH=1...
Recently, the technique of magnetic separation has been used to dispose water, especially the waste water of low concentration. The technique of magnetic separation is that we segregate different materials with the power of magnetic field. In this study, using chitosan — as raw materials, magnetic materials as the Cole, organically-linking technique was applied to produce magnetic microspheres. The...
The treatment of chromium containing wastewater using chitosan and the modified chitosan as adsorbents was studied. Various factors including solution pH, the dosage of absorbents and initial Cr (VI) concentrations were taken into account and promising results obtained. The results showed that the modified chitosan have a better efficiency on the removal of Cr (VI).an initial solution PH of 1.0 was...
The kinetic, equiLibrium and thermodynamics of Cr(VI) adsorption from aqueous solution on cetylpyridinium bromide (CPB) modified zeoLite were investigated. CPB modified zeoLite displayed a good affinity to Cr(VI) in aqueous solution, and its Cr(VI) adsorption capacity decreased with the increase of the temperature. The kinetics of adsorption of Cr(VI) were discussed using the pseudo-first-order and...
Adsorption of anionic azo dye methyl orange (MO) on chitosan/kaolin/ γ-Fe2O3 nanocomposite from aqueous solutions was investigated in a batch system with respect to adsorbent dosage and initial pH. The pseudo-first-order, pseudo-secondorder kinetic models and intra-particle diffusion model were used to evaluate the kinetic data and the rate diffusion model constants were calculated. Results of the...
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