Continuous dialysis of carboxylic acids. Permeability of Neosepta-AMH membrane

Palatý, Zdeněk; Žáková, Alena; Prchal, Pavel

doi:10.1016/j.desal.2006.09.029

Cited by 20 publications

(6 citation statements)

References 26 publications

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“…Besides, the research of high temperature DD process is quite useful for industry production, because the temperature of spent liquor discharged from factories is generally high, and frictional force from the continuous dialysis process will also increase the temperature of the waste solution. Moreover, higher temperature can accelerate the transport of ions across the membranes and enhance the permeation rate [25]. Until now, literature reports relating the high temperature diffusion are very few and thus our results here will be favorable for the in-depth investigation of the DD process.…”

Section: Introductionmentioning

confidence: 89%

“…The higher W R favors the diffusion of ions, while the lower C R decreases electrostatic repulsion of the membrane to H + or Fe 2+ . These changing trend, in addition to the elevated diffusivity of the H + and Fe 2+ inside the membrane [25], leads to the increasing diffusion of both Fe 2+ and H + . The adsorption of Fe 2+ in the membranes is also enhanced at higher temperature, as discussed above.…”

Section: Dialysis Coefficients (U H and U Fe )mentioning

confidence: 97%

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Diffusion dialysis of hydrochloride acid at different temperatures using PPO–SiO2 hybrid anion exchange membranes

Luo

et al. 2010

Journal of Membrane Science

167

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Section: Introductionmentioning

confidence: 89%

Section: Dialysis Coefficients (U H and U Fe )mentioning

confidence: 97%

Diffusion dialysis of hydrochloride acid at different temperatures using PPO–SiO2 hybrid anion exchange membranes

Luo

et al. 2010

Journal of Membrane Science

167

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“…For that reason, we defined a new criterion, S , as the sum of variances of P A at a constant value of c

_{italicA 0}^{italicI}

, which is plotted versus C in Figure 7. From this dependence, a value of C was used at which the criterion S reached a minimum or a constant value (see refs 37. and42).…”

Section: Resultsmentioning

confidence: 99%

“…The shape and size of the stirrers were designed to ensure ideal mixing of the solution volume in both compartments of the cell. In all experiments, we used an anion‐exchange membrane (Neosepta‐AMH) produced by Tokuyama Soda Co., Inc. (Tokyo, Japan), whose basic properties have already been published 36, 37. It is a strongly basic membrane with NC 7 H 7 + functional groups 38.…”

Section: Methodsmentioning

confidence: 99%

Transport characteristics of some carboxylic acids in the polymeric anion‐exchange membrane Neosepta‐AMH: Batch experiments

Palatý

Stoček

Žáková

et al. 2007

J of Applied Polymer Sci

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This article reports the transport of selected carboxylic acids-citric acid, oxalic acid, and tartaric acidthrough an anion-exchange membrane (Neosepta-AMH) in a two-compartment dialysis cell. These basic data have been completed by measurements of the sorption isotherms. The mass-transfer rate has been quantified by the following transport characteristics: the overall dialysis coefficient, the permeability of the membrane, and the membrane masstransfer coefficient. The sorption experiments have revealed that the Neosepta-AMH membrane exhibits the highest affinity to tartaric acid, whereas the lowest affinity has been found for citric acid. The analysis of the mass-transfer data has shown that the membrane is relatively permeable for oxalic acid: all three transport characteristics for oxalic acid are approximately 1 order of magnitude higher than those for citric or tartaric acid.

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“…The solute of urea (MW = 60.06, Kokusam Chemical Works, Yokohama-City, Kanagawa, Japan) was dissolved in pure water of inlet 2 M concentration flowing into the retentate phase while pure water flowed through the dialysate phase with solute diffusivity D = 8 × 10 −6 cm 2 /s. The density and the viscosity of pure water at 25 • C were ρ = 0.997 g/cm 3 and µ = 8.94 × 10 −3 g/cm•s, respectively, while the density and the viscosity of 2M urea solution at 25 • C were ρ = 1.026 g/cm 3 and µ = 9.75 × 10 −3 g/cm•s, respectively. The retentate phase flow rate (V a = 20, 25, 30, 35, 40 mL/min), dialysate phase flow rate (V b = 300 mL/min), and ultrafiltration rate (V b = 0, 5, 10 mL/min) were the specified operating parameters.…”

Section: Experimental Runsmentioning

confidence: 99%

Two-Dimensional Theoretical Analysis and Experimental Study of Mass Transfer in a Hollow-Fiber Dialysis Module Coupled with Ultrafiltration Operations

Chen

et al. 2023

Membranes

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This research theoretically and experimentally develops a hollow-fiber dialysis module coupled with ultrafiltration operations by introducing a trans-membrane pressure during the membrane dialysis process, which can be applied to the waste metabolic end products in the human body for improving the dialysis efficiency. The solutes were transported by both diffusion and convection from the concentration driving-force gradient between retentate and dialysate phases across the membrane, compared to the traditional dialysis processes by diffusion only. A two-dimensional modeling of such a dialysis-and-ultrafiltration system in the hollow-fiber dialysis module was formulated and solved using the stream function coupled with the perturbation method to obtain the velocity distributions of retentate and dialysate phases, respectively. The purpose of the present work is to investigate the effect of ultrafiltration on the dialysis rate in the hollow-fiber dialyzer with ultrafiltration operations. A highest level of dialysis rate improvement up to about seven times (say 674.65% under Va=20 mL/min) was found in the module with ultrafiltration rate Vw=10 mL/min and membrane sieving coefficient θ=1, compared to that in the system without operating ultrafiltration. Considerable dialysis rate improvements on mass transfer were obtained by implementing a hollow-fiber dialysis-and-ultrafiltration system, instead of using the hollow-fiber dialyzer without ultrafiltration operation. The experimental runs were carried out under the same operating conditions for the hollow-fiber dialyzers of the two experimental runs with and without ultrafiltration operations for comparisons. A very reasonable prediction by the proposed mathematical model was observed.

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Continuous dialysis of carboxylic acids. Permeability of Neosepta-AMH membrane

Cited by 20 publications

References 26 publications

Diffusion dialysis of hydrochloride acid at different temperatures using PPO–SiO2 hybrid anion exchange membranes

Diffusion dialysis of hydrochloride acid at different temperatures using PPO–SiO2 hybrid anion exchange membranes

Transport characteristics of some carboxylic acids in the polymeric anion‐exchange membrane Neosepta‐AMH: Batch experiments

Two-Dimensional Theoretical Analysis and Experimental Study of Mass Transfer in a Hollow-Fiber Dialysis Module Coupled with Ultrafiltration Operations

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