Showing papers by "Reza Fazaeli published in 2013"
TL;DR: In this article, removal of metal ions Pb (II) using nanostructured γ-alumina was investigated in a fixed-bed column, and the experimental data were in good agreement with Thomas and Yoon-Nelson models, but in the case of Adams-Bohart model, low correlation coefficient is observed.
Abstract: In the present study, removal of metal ions Pb (II) using nanostructured γ-alumina was investigated in a fixed-bed column. Comparison of Thomas, Yoon-Nelson, and Adams-Bohart models with experimental kinetic results was done, and model parameters were evaluated by linear regression analysis for Pb2+ adsorption in different bed heights, initial concentrations, and flow rates. The obtained experimental data are in good agreement with Thomas and Yoon-Nelson models, but in the case of Adams-Bohart model, low correlation coefficient is observed.
98 citations
Journal Article•
TL;DR: In this article, PbZrO 3 was prepared as a matrix by the sol-gel process and characterized by XRD and SEM techniques, the particle size of the synthesized nanocomposite is evaluated about 43 nm.
Abstract: In this study PbZrO 3 was prepared as a matrix by the sol-gel process and is characterized by XRD and SEM techniques. The particle size of the synthesized nanocomposite is evaluated about 43 nm. The Lead Zirconate is then doped with Ce 3+ /TiO 2 in different ratios. Nanocomposites are added in the reaction in a photoreactor with a pollutant (an Azo dye) and as a result the degradation percentage is obtained. The degradation was studied by monitoring the change in substrate concentration employing UV spectroscopic analysis technique. Kinetic studies on these nanocomposites are carried out based on the related models and the reaction order is evaluated. Finally, Surface adsorption of the pollutants
6 citations
TL;DR: In this paper, the stability of rotation as function of competing dissociation pathways and also result of natural bond orbital analysis were discussed, and it was determined that the cis to trans barrier height is nearly 5.7-6.3 kcal−1.1.
Abstract: Torsional barrier height of thionitrous acid is analysed with Gaussian-2(G2), quadratic complete basis set (CBS-Q) and DFT-B3LYP/CBS-Q (CBS-QB3) methods. In agreement with purely intuitive arguments, it was determined that the cis to trans barrier height is nearly 5.7–6.3 kcal mol − 1. In addition, the stability of rotation as function of competing dissociation pathways and also result of natural bond orbital analysis are discussed.
3 citations