Showing papers by "Abd El-Aziz A. Said published in 2018"
TL;DR: In this paper, the acidity of the catalysts was studied and correlated with the catalytic activity, and the obtained results clearly revealed that CaMoO4 was an active and selective catalyst towards the formation of anhydrous formaldehyde.
21 citations
TL;DR: In this paper, the effect of different factors on the efficiency of the adsorbent for the diazonium blue (DB) dye removal was investigated, including initial dye concentration, contact time, SCB dosage and SCB particle size.
Abstract: The present study concerns with exploring the possibility of using of tartaric acid pretreated sugarcane bagasse (SCB) for removing diazonium blue (DB) from aqueous solutions. The effect of different factors on the efficiency of the adsorbent for the DB dye removal was investigated, including initial dye concentration, contact time, SCB dosage and SCB particle size. Langmuir, Freundlich, Tempkin and D–R isothermal models have been employed to analyze the adsorption equilibrium data. It was found that the adsorption of the dye fits well with the D–R model. The adsorption kinetics was also done applying four kinetic models. The regression equation coefficients refer to fitting the data to the second-order kinetic equation for removal of the DB dye. It is probable that the rate limiting step is a chemical adsorption between the adsorbent and the dye. This chemisorption process is further confirmed from the energy value of 15.1 kJ mol−1 deduced from the D–R isotherm.
9 citations
TL;DR: In this paper, the FT-IR results revealed that there were different interactions between sulfate and ZrO2, and this had a great effect on the surface area of the samples.
9 citations