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In this study, untreated and chemical treated PET recycled fibers were tested for the retention of Pb(II) and Cu(II) from aqueous media. Batch systems were used experimental as a function of initial concentration of metal ions, to highlight the possible utilization of this low-cost material in the wastewater treatment. Two chemical treatments (with Na2S2O3 and NaOH solutions, 4N) were used for the...
This study presents a control strategy of carbon dioxide capture from flue gas by Vacuum Pressure Swing Adsorption (VPSA). The key objective of this work is to control and optimize the purity and recovery of the adsorption product (carbon dioxide) by manipulating the time duration of the VPSA cycle steps. Based on a single fixed-bed 6-step VPSA process simulation using 5A zeolite as adsorbent for...
Simulated moving bed (SMB) chromatography process is often considered to achieve high-purity separation performance in practice. However, conventional SMB process can only be applied to binary mixture system. This can be overcome by adding side-stream to the SMB process. This paper presents modeling and design of SMB process with side streams and its optimal operating condition to maximize the production...
A Multi-Model Predictive Control (M-MPC) algorithm is developed for a novel Rapid Pressure Swing Adsorption (RSPSA) oxygen concentrator system. The RPSA uses a zeolite material to purify oxygen from ambient feed air, and was designed to produce ∼ 90% oxygen for medicinal therapies. A standard MPC algorithm was implement on the RPSA which rejects disturbances and improves set point tracking in the...
Ultrapure water contains several kinds of contaminaminants. In particular, we paid much attention to particles and investigated particles adsorption onto Si wafer. We succeed in making a model through two experiments, that is, one is to study an impact of spin cleaning parameters on particle adsorption, and the other is to study that of such impurities as urea, hydrogen peroxide, and so on.
This study investigated the adsorption of Cd(II) ions in aqueous solutions onto the chitosan flakes cross-linked with glutaraldehyde (Gch), and citric acid (CGch). The optimal conditions for these adsorptions process were found to be at pH 6 with contact time of 400 min for Gch and 350 min for CGch. The Cd(II) adsorption process on Gch and CGch well fitted to the pseudosecond-order model. The data...
Response surface methodology combined with Box-Behnken experimental design were employed to study the adsorption of U(VI) on microwave activated rice husk ash (ARHA) to elucidate the effects of parameters such as pH, adsorbent dose and U(VI) initial concentration on the adsorption process. Experimental data indicated that pH and adsorbent dose positively affected the adsorption process of U(VI) by...
In order to meet the requirements that wall-climbing robot for ship degusting can adsorb on the hull surface and move flexibly, a new track-type permanent magnetic adsorption device is presented. It is made up of a plurality of permanent magnetic adsorption units and chains, using screws to connect. In this paper, the basic structure of the permanent magnetic adsorption unit is designed and the theoretical...
The present study predicts the feasibility for the adsorptive removal of Victoria Blue dye (VB dye) from aqueous solution using a low cost biosorbent Zizyphus Oenoplia seed (ZOS). In this study, a batch mode adsorption experiments were carried out using various parameters such as pH, contact time, concentration of dye, adsorbent dosage and temperature. The feasibility of the process is evaluated with...
The main aim of this work was to explore the potential application of orange peel waste as biosorbents for removing methylene blue (MB) in aqueous solution. We will investigate the effects of different adsorption parameters such as the initial concentration of MB, adsorption time; adsorbent dosage, adsorption temperature and initial pH on MB adsorption. It was found that the adsorption capacity was...
In this paper, a new contrast media diffusion simulation algorithm is proposed for minimally invasive vascular interventions. On the basis of smoothed particle hydrodynamics (SPH), the algorithm could be mainly divided into two parts: fluid-fluid interaction and fluid-solid interaction. In the fluid-fluid interaction, an adsorption model of iodine particles is built, and the adjacent blood flow particles...
In this work we describe a high level Matlab-Simulink model of a sensor system for vapor trace detection of different molecules in the air using array of differently functionalized capacitive sensors and extremely sensitive integrated electronic detection system. The model includes the adsorption/desorption process of differently modified sensors and high-level model of a low noise analog signal processing...
In this work we study equilibrium and kinetic adsorption process of Methylene Blue (MB) and Copper phthalocyanine (CuPhTh) dyes on TiO2 thin films. We synthesized phthalocyanines through Achar method; dyes were characterized by Fourier-Transform Infrared spectroscopy (FTIR) and Diffuse reflectance. TiO2 thin films were fabricated by Doctor Blade method for using Degussa P25 as TiO2 source. We used...
There is growing global interest on bio-methane as a vehicular fuel and Europe Union (EU) has stated that this as a best well-to-wheel fuel. Commercialization of bio-methane under atmospheric conditions is limited due to its requirement of higher storage capacity. Compressed bio-methane systems have been currently commercialized in Europe in order to increase its low energy density however the process...
Since heavy metal pollution is a significant aspect to aquatic ecosystems, the objective of this research work was to investigate adsorption characteristics of chitosan as an alternative adsorbent material. In this study, chitosan, synthesized from locally available shrimp type “penaeus monodon” was used to observe adsorption characteristics of cadmium (Cd) and lead (Pb) heavy metals from aqueous...
The continuous adsorption of Pb (II) in a fixed column was studied in this work. Shea butter husk was treated in a polymeric mixture of calcium alginate to produce beads of approximately 1.56 mm ± 0.14 spherical shapes. Optimum parameters evaluated revealed an effective column performance at flow rate of 0.5 ml/min, bed heights of 12 cm and at initial concentrations of 50 mg/L. The percentage removal...
This paper explores the potential of French green beans (Phaseolus Vulgaris) and Lotus Stem (Nelumbo Nucifera) as potential low-cost adsorbents for the removal of Methylene Blue from wastewater. The studies were conducted with variation in parameters of pH, biomass concentration, contact time and initial dye concentration. The nature of the possible adsorbent and metal ion interactions was examined...
In this work, a two-dimensional model is proposed to predict the electrical response of a generic polymer-based chemiresistor. Three different physical phenomena are modeled: fluid dynamics of the carrier fluid; adsorption of the analyte on the sensitive layer; change of electrical resistance due to adsorption.
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.
We present a case study for iterative set point optimizing control, the control of a ternary chromatographic separation process for which structural and parametric model uncertainty must be taken into account. The process considered here is a continuous switched chromatographic multicolumn separation process with high purity and yield requirements. In each iteration, the optimal cyclic steady state...
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