Sorption Kinetics
Mostrando 13-24 de 44 artigos, teses e dissertações.
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13. The effect of TTNT nanotubes on hydrogen sorption using MgH2
Nanotubes are promising materials to be used with magnesium hydride, as catalysts, in order to enhance hydrogen sorption. A study was performed on the hydrogen absorption/desorption properties of MgH2 with the addition of TTNT (TiTanate NanoTubes). The MgH2-TTNT composite was prepared by ball milling and the influence of the TTNT amount (1.0 and 5.0 wt. (%))
Mat. Res.. Publicado em: 08/03/2013
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14. Bioadsorção e dessorção dos íons Cd POT. 2+ , Cu POT. 2+ , Ni POT. 2+ , Pb POT. 2+ e Zn POT. 2+ pela macrófita aquáica Azolla pinnata / Biosorption and desorption of Cd POT. 2+ , Cu POT. 2+ , Ni POT. 2+ , Pb POT. 2+ e Zn POT. 2+ by the aquatic macrophyte Azolla pinnata
Research in the technology field has been looking for evaluating efficient and economic techniques and/or process for effluents that contains heavy metal. The biodsorption process has been seemed as a good alternative to the existing technology. This work had the aim to investigate the use of Azolla pinnata macrophyte as biosorbent of five metallic ions: Cd2
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 21/11/2012
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15. Estudo teórico e experimental do calor específico e da cinética de sorção em reator fixo / THEORETICAL AND EXPERIMENTAL STUDY OF THE SPECIFIC HEAT AND THE SORPTION KINETICS IN FIXED REACTOR.
O presente trabalho tem como objetivo realizar um estudo teórico e experimental do calor específico e da cinética de sorção em reator fixo. O experimento do calor específico foi realizado no laboratório de materiais da UFPB e a bancada experimental da cinética de sorção em reator fixo foi montada no Laboratório de Energia Solar (LES), ambos, local
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 13/04/2012
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16. Magnesium-Nickel alloy for hydrogen storage produced by melt spinning followed by cold rolling
Severe plastic deformation routes (SPD) have been shown to be attractive for short time preparation of magnesium alloys for hydrogen storage, generating refined microstructures and interesting hydrogen storage properties when compared to the same materials processed by high-energy ball milling (HEBM), but with the benefit of higher air resistance. In this st
Mat. Res.. Publicado em: 09/08/2012
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17. Kinetic of water diffusion and color stability of a resin composite as a function of the curing tip distance
The influence of curing tip distance and storage time in the kinetics of water diffusion (water sorption-W SP, solubility-W SB, and net water uptake) and color stability of a composite were evaluated. Composite samples were polymerized at different distances (5, 10, and 15 mm) and compared to a control group (0 mm). After desiccation, the specimens were stor
Materials Research. Publicado em: 03/07/2012
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18. CARACTERIZAÇÃO DE ESCAMAS DE PEIXE ROBALO (DICENTRARCHUS LABRAX) E SEU ESTUDO DE SORÇÃO DE CORANTES EM MEIO AQUOSO. / CHARACTERIZATION OF FISH SCALES BASS (DICENTRARCHUS LABRAX) AND HIS STUDY OF SORPTION OF DYES IN AQUEOUS.
Dentre os vários processos para a remoção de corantes de efluentes aquosos, o de sorção constitui um dos mais efetivos. O presente trabalho avaliou a utilização de escamas de peixe Robalo (Dicentrarchus labrax) como um novo material adsorvente para a remoção de do corante catiônico azul de metileno (AZM) de soluções aquosas. As escamas foram cara
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 09/09/2011
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19. Thermodynamic and kinetic studies of cadmium adsorption from aqueous solution onto rice husk
The adsorption behavior of rice husk for cadmium ions from aqueous solutions has been investigated as a function of appropriate equilibrium time, adsorbent dose, temperature, adsorbate concentrations and pH in a batch system. Studies showed that the pH of aqueous solutions affected cadmium removal with the result that removal efficiency increased with increa
Brazilian Journal of Chemical Engineering. Publicado em: 2010-06
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20. Kinetics and equilibrium studies of Pb2+ in removal from aqueous solutions by use of nano-silversol-coated activated carbon
The ability of nano-silversol-coated activated carbon (NSSCAC) to adsorb Pb2+ from aqueous solution has been investigated through batch experiments. The adsorption of lead onto NSSCAC has been found to depend on adsorbent dose, initial concentration and contact time. The experiments were carried out at natural solution pH. Equilibrium data fitted well with t
Brazilian Journal of Chemical Engineering. Publicado em: 2010-06
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21. Removal of lead from aqueous solution using waste tire rubber ash as an adsorbent
The purpose of this study was to investigate the possibility of the utilization of waste tire rubber ash (WTRA) as a low cost adsorbent for removal of lead (II) ion from aqueous solution. The effect of different parameters (such as contact time, sorbate concentration, adsorbent dosage, pH of the medium and temperature) were investigated. The sorption process
Brazilian Journal of Chemical Engineering. Publicado em: 2010-03
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22. Development of mg alloys in bulk forms for hydrogen storage / Desenvolvimento de ligas de Mg em formas maciças para armazenagem de hidrogênio
In the present work, bulk magnesium metallic hydrides (MgH2 and Mg2FeH6) were produced. Commercially pure Mg and mixtures of 2Mg-Fe were processed by severe plastic deformation (SPD) by using High Pressure Torsion (HPT) method, and also by hot extrusion. Studies were accomplished with relationship to the possibility of bulk hydrides production from those mat
Publicado em: 2010
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23. Biosorption kinetics of Cd (II), Cr (III) and Pb (II) in aqueous solutions by olive stone
A by-product from olive oil production, olive stone, was investigated for the removal of Cd (II), Cr (III) and Pb (II) from aqueous solutions. The kinetics of biosorption are studied, analyzing the effect of the initial concentration of metal and temperature. Pseudo-first-order, pseudo-second-order, Elovich and intraparticle diffusion models have been used t
Brazilian Journal of Chemical Engineering. Publicado em: 2009-06
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24. Adsorption of nuclease p1 on chitosan nano-particles
The sorption of nuclease P1 onto chitosan nano-particles is studied in this paper. The effect of some adsorption kinetics factors such as nuclease P1 concentration, chitosan nano-particles solution concentration, adsorption temperature, chitosan nano-particles size, solution pH, etc. is investigated. Adsorption of nuclease P1 onto chitosan nano-particles is
Brazilian Journal of Chemical Engineering. Publicado em: 2009-06