[PDF] Top 20 Braz. J. Chem. Eng. vol.27 número2

... Investigation also revealed that coated thin film was porous when analyzed after incubation and signs of swelling were observed, which were indicative of initial water absorption resu[r] ... See full document

... In the present work, the biosorption of copper(II) ions onto a lactic acid bacterium, namely Enterococcus faecium , was studied by investigating the influences of different experiment[r] ... See full document

... The production of electricity by “green” energy technologies based on biomass catalytic activity (Biofuel cells), renewable sources such as solar (photovoltaic device) and hydrogen (h[r] ... See full document

... Δ and Δ were determined from the slope and S o the intercept of the plots of plots of log K versus c 1/T (Fig. 6). The Δ G o values were calculated using Equation (3). Adsorption of cadmium on rice husk decreased when ... See full document

... The adsorption was very fast from the beginning to 30 min and the percentage removal decreased from 90 to 80% over the lead concentration range of 100 to 500 mg/l at a contact time o[r] ... See full document

... Many researches have shown that particles exhibiting an enhancement effect for gas absorption should possess two properties (Demmink et al., 1998, Dagaonkar et al., 2003, Vinke et al.[r] ... See full document

... The water activity of aqueous solutions containing a polymer and a salt at concentrations similar to those found in aqueous two-phase systems is evaluated considering different appro[r] ... See full document

... The batch adsorption experiments were conducted at 303 K to study the effect of important parameters like pH, adsorbent dose (m), contact time (t) and initial dye concentration (C o )[r] ... See full document

... Abstract - The adsorption characteristics of cadmium and nickel onto expanded perlite from aqueous solution have been investigated with respect to changes in pH of solution, adsorbent [r] ... See full document

... The experimental data of the dispersed phase overall mass transfer coefficient are compared with theoretical models and the models derived for prediction of the enhancement factor in [r] ... See full document

... The challenge faced by the proposed mathematical model was the reduction in the replacement of felts through the selection of an optimal sequence of the reel production, increasing i[r] ... See full document

... The operation of solid-liquid vessels at steady state in the turbulent flow regime was considered. The vessel was filled with water and particles of uniform size and density. Stirring took place in a vertical cylindrical ... See full document

... The present paper deals with the performance characteristics of a jet loop bubble column, with special emphasis on gas entrainment, gas holdup, bubble sizes, interfacial area and mass[r] ... See full document

... The application of an adsorption operation to remove reactive turquoise blue QG dye with commercial activated carbon therefore required detailed information on kinetics and equilibriu[r] ... See full document

... Although connection weight does not have any physical meaning, as it is a variable from a black box model, using connection weights it is possible to evaluate the influence of each active agent in the biocide for control ... See full document

... A distinct decrease in the velocity function is observed with an increase in the particle concentration parameter, which in all cases decays from a maximum at the cylinder surface (y[r] ... See full document

... The model implemented in this work captures the effect of the fluid velocity associated with the step inclination angle on the phase change process and the conduction heat transfer p[r] ... See full document

... For the nickel sieves, we did not observe any cake formation during the cross-flow filtration, nor did we observe (by SEM) the presence of rutin particles on the sieves after filtrati[r] ... See full document

... A multi-scale model-based approach that combines a CAMD technique based on group contribution plus models for predicting polymer repeat unit properties with atomistic simulations for [r] ... See full document

... Therefore, the present work provides an evaluation of some steps of an alternative process for the recovery of waste lubricant oils based upon extraction by solvents, followed by adso[r] ... See full document