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... operating temperatures enhanced the Bz and Cx fluxes, and the activation energy was 50.1 kJ/mol for Bz and 55.1 kJ/mol for Cx. The solution-diffusion model was used to elucidate the mass-transfer mechanism. The sorption isotherms of the liquid mixtures in the membranes were determined. Th ...
Desalination 149 (2002)
Water vapor and gas transport through a poly(butylene terephthalate) poly(ethylene oxide) block copolymer
... has been built to determine the water vapor and nitrogen transport rates from mixed gas experiments at temperatures up to 80°C and 80 bar. The diffusion coefficient of water decreases with activity when determined from sorption and permeation experiments. The water vapor permeability decreases an ...
Desalination 148 (2002)
... < CaC2 and MgAc2 < CaAc2 A very good correlation has been observed between the permeation of electrolytes through the membrane and their overall diffusion coefficient in an infinite dilute solution. This implies that the adsorption of the solute in the membrane dose not play an important role in th ...
Desalination 144 (2002)
Characterization of film transport properties for organic vapors using the time-lag method — interest and limitations
... for permanent gases whereas with volatile organic vapors (VOCs) this routine procedure does not give valuable results, in particular in case of diffusion varying with activity, swelling of the polymer or small time-lag values. Working with VOCs under time-lag conditions, an imperfect pressure ste ...
Desalination 144 (2002)
Identification of the mixing processes in brine discharges carried out in Barranco del Toro Beach, south of Gran Canaria
... great biological importance on the sandy seabeds of the coasts of the Canary Islands. Keywords: Discharge; Outfall; Brine water; Mixing processes; Diffusion; Cymodocea nodosa; Caulerpa prolifera; “Cebadales” *Corresponding author. Presented at the European Conference on Desalination and th ...
Desalination 139 (2001)
Investigations on sorption, diffusion and permeation of chloroalkanes and -alkenes through fluoroelastomeric membranes
Sorption, diffusion and permeation of halogenated liquids such as chloroform, dichloromethane, carbon tetrachloride, 1,2-dichloroethane, 1,1,2,2-tetrachloroethane ...
Desalination 196 (2006)
... brine stream. The moderated performances of the bioreactor were shown. Keywords: Electrodialysis performances; Bioreactor; Recovery rates; Scale; Diffusion 1. Introduction Pollution of ground and surface water by nitrates is a planetary preoccupation. It is a common concern of industrial an ...
Desalination 153 (2002)
... forms and decrease for the potassium form with an electrolyte concentration increase. The obtained data were compared with the results of diffusion permeability, ion-exchange kinetics, 7Li and 35Cl NMR measurements. In all cases permeability increased with electrolyte concentration growth.
Desalination 170 (2004)
New electrokinetics tools for studying ageing of ED and NF membrane processes in contact with highly salted solutions from seawater
... to adapt the commercial membrane material better to very highly salty water resources. Keywords: Electrodialysis; Nanofiltration; Transfer number; Diffusion; Ageing membrane material *Corresponding author. Presented at the EuroMed 2004 conference on Desalination Strategies in South Mediterranea ...
Desalination 167 (2004)
Determination of the electrolyte and osmotic permeability coefficients by conductometric and emf methods
... determining the thickness of the polarisation layer, lp, from the limiting current density using the Nafion 117 membrane, the corrections for the diffusion of electrolytes and volume osmotic flux through that membrane can be omitted; both Eqs. (15) and (20) yield practically the same values of lp.
Desalination 162 (2004)