Dialytic transport of carboxylic acids through an anion exchange membrane

“…Diffusion dialysis as an attractive separation technology has been widely applied to recover inorganic or organic acid from waste solutions due to the unique advantages of diffusion dialysis especially the environmental benignity and low energy consumption [5][6][7][8]. Diffusion dialysis separation process utilizing anion exchange membrane (AEM) is driven by concentration gradient, in which the solutes spontaneously pass through AEM from high to low concentration side [9].…”

Section: Introductionmentioning

confidence: 99%

Porous diffusion dialysis membranes for rapid acid recovery

Lin

Shamsaei

Kong

et al. 2016

Journal of Membrane Science

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“…Taking into account, the Donnan dialysis uses the chemical potential differences between the membrane sides to generate ionic transport and maintain the electroneutrality of the two solutions . Donnan dialysis has applications in many areas, such as chemical analysis for preconcentration, extraction processes, hydrometallurgy, separating acids from their salts, radioactive flow deacidification, removing copper and zinc using commercial cationic membranes, and removing inorganic anions such as fluoride, nitrate, bromated, and borates from drinking water . In addition, Donnan dialysis has removed Cr(VI) ions using commercial anion exchange membranes such as SB‐6470, AFN, ACM, and Raipore 1030 .…”

Section: Introductionmentioning

confidence: 99%

Polypropylene membranes modified with interpenetrating polymer networks for the removal of chromium ions

Tapiero

Rivas

Sánchez

et al. 2015

J of Applied Polymer Sci

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Polypropylene (PP) membranes incorporating poly [(ar-vinylbenzyl) trimethylammonium chloride] P(ClVBTA), and poly[sodium (styrene sulfonate)] P(SSNa) were modified via an "in situ" radical polymerization synthesis. Two methods were used for impregnation of the reactive solution: pressure injection and plasma superficial activation with argon gas. The following conditions were varied: the monomer concentrations, number of injections, and cross-linked concentration. The modified polypropylene membranes were then characterized using scanning electron microscopy/energy dispersive X-ray spectroscopy, Fourier transform-infrared spectroscopy, electrokinetic potential, and Donnan dialysis for the chromium ions transport. The modified membranes exhibited a hydrophilic character with a water uptake capacity between 15% and 20% and a percent modification between 2.5% and 4.0%. This was compared with the results of an unmodified polypropylene membrane as the blank and the mentioned polypropylene membrane has not the capacity to uptake water because this kind of material is highly hydrophobic. Hexavalent chromium ions were efficiently transported by the modified membranes containing P(ClVBTA) via a plasma method and it achieved 59.2% extraction at pH 9.0 using a 1-mol L 21 NaCl extraction agent. Therefore, unmodified polypropylene membrane shows an extraction percentage close to 10% from the hexavalent chromium ions at pH 9.0. In the same way, the trivalent chromium transport using membranes modified with P(SSNa) achieved 49.0% extraction at pH 2.0 using 1 3 10 21 mol L 21 HNO 3 and 1 mol L 21 NaCl as the extraction agents. Moreover, the unmodified polypropylene membrane reached a value close to 10% from the trivalent chromium ions using 1 3 10 21 mol L 21 HNO 3 and 1 mol L 21 NaCl.

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Dialytic transport of carboxylic acids through an anion exchange membrane

Cited by 49 publications

References 5 publications

Porous BPPO-based membranes modified by aromatic amine for acid recovery

Porous BPPO-based membranes modified by aromatic amine for acid recovery

Porous diffusion dialysis membranes for rapid acid recovery

Polypropylene membranes modified with interpenetrating polymer networks for the removal of chromium ions

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