The aim of this study was to determine the effects of main factors and interactions on the color removal performance from dye solutions using the electrocoagulation process enhanced by adsorption on Granular Activated Carbon (GAC). In this study, a mathematical approach was conducted using a two-level fractional factorial design (FFD) for a given dye solution. Three textile dyes: Acid Blue 74, Basic Red 1, and Reactive Black 5 were used. Experimental

An experimental design methodology was applied for response surface modeling and optimization of diethyl phthalate (DEP) removal from synthetic wastewater by continuous-flow ozonation. The five independent variables considered were the initial concentration of DEP, initial solution pH, liquid flow rate, gas flow rate, and ozone concentration in the inlet gas. Using the Box–Behnken design, two quadratic models were developed as a functional relationship

The paper reports the preparation of two luminescent xerogels through embedding in a silica matrix of Tb(III) and Eu(III) complexes using succinimide (SI) and N-hydroxysuccinimide (NHSI) as ligands. In the first stage, Tb(III) and Eu(III) complexes with N-hydroxysuccinimide and succinimide were prepared at 1:3 metal to ligand ratio. Strong luminescent emission was observed only in case of Eu(III)-SI and Tb(III)-NHSI complexes while the Eu(III)-NHSI

An experimental study on the separation of sulfides from aqueous solution by electrocoagulation is described in this work. Two types of anode materials, aluminum and mild steel, were investigated in relation to anodic dissolution, removal efficiency and energy consumption. Experiments were carried out under galvanostatic regime at different values of current density. During the experiments, the pH was monitored and adjusted in order to maintain near

A study approaching the anodic dissolution of iron and aluminum based electrodes in aqueous solutions containing sulfate or chloride ions is presented in this paper. Beside the influence of the supporting electrolyte, it is experimentally established the influence of the solution pH on the anodic dissolution of the two anodic materials considered. As the anodic dissolution of the anode surface is the first step of electrocoagulation processes, the

The present paper examines the characteristics of some new composite materials synthesized by impregnating activated carbon with CaCl ,solutions ofdifferent concentrations. Water sorption properties of the novel composite materials were studied and it was found that the water amount adsorbed increases remarkably when the CaCl 2 concentration in matrix increases. The structure and sorption properties of the composites were investigated by XRF, XRD,

The present work describes a modified colloidal synthesis route for the preparation of CdSe nanocrystals, which were further embedded in a polystyrene matrix. Used as a reaction medium, glycerin makes it possible to obtain nanocrystals at lower temperatures in all process stages and an easier separation from the reaction mass. The influence of two different cadmium compounds used as primary cadmium sources over the quality of synthesized CdSe nanocrystals

The preparation of two highly luminescent europium(III) and terbium(III) complexes with succinimide (SI) and N-hydroxysuccinimide (NHSI) were reported, which were further investigated through elemental chemical analysis, thermal analysis, FT-IR, powder X-ray diffraction, SEM and fluorescence spectroscopy. Data collected through these analysis revealed the formation of the Eu(III) and Tb(III) complexes with the above mentioned ligands at a metal to

The present work studies the removal of indigo carmine from aqueous solutions by an electrocoagulation (EC)/granular activated carbon (GAC) adsorption coupling process. The kinetics of this coupling process was studied using several GACs and different amounts of adsorbent material in order to identify the most appropriate adsorbent and dosage, respectively, for enhancing wastewater treatment. The influence of current density on the removal efficiency

The experimental design methodology was applied for response surface modelling (RSM) of a packed-bed based pilot-scaled set-up for water vapour adsorption on impregnated alumina grains. Experimental breakthrough cuwes were determined. The variables considered were the ratio between the volume of adsorbent bed and air now rate (residence time), a geometrical parameter, the ratio between adsorption column diameter and the bed height, and air relative