A5007941339- Adsorption and biosorption for pollutant removal
- Chemical Synthesis and Characterization
- Membrane-based Ion Separation Techniques
- Membrane Separation and Gas Transport
- Zeolite Catalysis and Synthesis
- Chemical and Physical Properties in Aqueous Solutions
- Electrostatics and Colloid Interactions
- Phase Equilibria and Thermodynamics
- Advanced Control Systems Optimization
- Radioactive element chemistry and processing
- Mercury impact and mitigation studies
- Phosphorus and nutrient management
- Electrokinetic Soil Remediation Techniques
- Field-Flow Fractionation Techniques
- Arsenic contamination and mitigation
- Thermodynamic properties of mixtures
- Metal-Organic Frameworks: Synthesis and Applications
- Diffusion Coefficients in Liquids
- Advanced Control Systems Design
- Adsorption, diffusion, and thermodynamic properties of materials
- Covalent Organic Framework Applications
- Fluoride Effects and Removal
- Crystallization and Solubility Studies
- Ammonia Synthesis and Nitrogen Reduction
- Catalytic Processes in Materials Science
University of Aveiro
2007-2014
The main transport mechanisms involved in pure and multicomponent gas permeation through real microporous membranes are reviewed this article. They include viscous flow, Knudsen diffusion, bulk diffusion (in mixtures), surface activated gaseous diffusion. individual contribution of each mechanism may be discriminated from experiments, can used to detect the occurrence defects membrane structure. In case mixtures, milestone theory Maxwell–Stefan advantageously applied model transfer embodied....
AbstractIn this essay, the Maxwell-Stefan (MS) formalism was adopted to model removal of cadmium(II) and mercury(II) ions from aqueous solutions using microporous titanosilicate ETS-4. The embodied transport mechanism is surface diffusion, since small pore diameters such zeolite-type materials imply that counter never escape force field matrix co-ions, mainly owing strong long range electrostatic interactions. parameters global are MS diffusivities ion–ion ion–solid pairs, a convective mass...
In this Article the ion exchange equilibrium of binary and multicomponent systems was modeled with homogeneous mass action law using activities taking account partial dissociation salts according to Kester Pytkowicz's approach. The activity coefficients in solution were estimated by Pitzer model sorbent Wilson, nonrandom two-liquid (NRTL), universal quasichemical (UNIQUAC) models. Wilson has already been adopted literature, while NRTL UNIQUAC investigated here for first time. modeling...
Two models comprising external and intraparticle mass transfer resistances developed to describe ion exchange in microporous materials are compared. Maxwell-Stefan Nernst-Planck equations account for both concentration electric potential gradients. However, under certain conditions, approach can be more advantageous particularly due taking into ion-ion ion-solid interactions separately. The were tested compared with data available the literature, namely batch experiments on cadmium (II)...
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTPermeation of Adsorbable and Non-Adsorbable Gases in Microporous Zeolite MembranesPatrícia F. Lito , Ana L. Magalhães Carlos M. Silva Daniel A. Fernandes View Author Information CICECO, Departamento de Química, Universidade Aveiro, Campus Santiago, 3810-193 Portugal CESAM, PortugalCite this: J. Chem. Educ. 2009, 86, 8, 976Publication Date (Web):August 1, 2009Publication History Received3 August 2009Published online1 inissue 1...