Modification of properties of ion exchange membranes V. Structure of cationic polyelectrolyte on the surface of cation exchange membranes

Sata, Toshikatsu; Izuo, K.

doi:10.1007/bf01438033

Cited by 23 publications

(2 citation statements)

References 21 publications

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“…Many studies were carried out, in the last years, on the modification of ion exchange resins and membranes [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16].…”

Section: Introductionmentioning

confidence: 99%

Ion Exchange Equilibrium between DOWEX 1X8 Resin Modified by Polyethyleneimine and Electrolyte Solutions

Chérif¹,

Guesmi²,

Missaoui³

et al. 2013

JWARP

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In order to improve the selectivity of anion exchange resin, the surface of gel type anion exchange resin was modified with polyethyleneimine (PEI). In the proposed work an attempt to the utilization of commercial anion exchange resin modified by adsorption of polyethyleneimine was investigated. Many conditions of modification of anion exchange resin surface were studied. The influent parameters on the DOWEX 1X8 resin modification were determined using a factorial experimental design. The ion exchange reactions were studied for modified and unmodified resin and electrolyte solutions containing 2 3 Cl , NO and SO 4    . All experiments were performed at constant ionic strength I = 0.3 mol·L −1 and constant temperature T = 298 K. Ionic exchange isotherms were established for the binary systems: 2 2 3 4 NO SO .   3 4Cl NO , Cl SO andThe obtained results show that nitrate ion was more sorbed than chloride and sulfate. The order of preference for the anions studied in this investigation is:All the results given by this resin were compared with those obtained with the AMX anion exchange membrane. Selectivity coefficients and thermodynamic constants for the three binary systems and for the two resins were determined. The modified resin became more selective towards monovalent anions.

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“…Many studies were carried out, in the last years, on the modification of ion exchange resins and membranes [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16].…”

Section: Introductionmentioning

confidence: 99%

Ion Exchange Equilibrium between DOWEX 1X8 Resin Modified by Polyethyleneimine and Electrolyte Solutions

Chérif¹,

Guesmi²,

Missaoui³

et al. 2013

JWARP

View full text Add to dashboard Cite

show abstract

“…This is due to the penetration of the surfactant agent within the membrane. To avoid this problem, Sata and Izuo () tried to substitute cationic surfactant by polyelectrolytes, which have high molecular weight, in order to limit their migration inside the membrane. It was shown that polyethyleneimine (PEI) is an effective polyelectrolyte to prepare modified ion exchange membrane selective to monovalent ions with low electric resistance (Sata and Mizutani, ; Chapotot et al, ).…”

Section: Introductionmentioning

confidence: 99%

Modification of the AMX membrane surface: Temperature dependence of anion exchange equilibrium

2012

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In order to improve the selectivity of the AMX membrane, a polyethyleneimine (PEI) layer was adsorbed on its surface. Ion exchange isotherms of (Cl−/NO3−), (Cl−/SO42−) and (NO3−/SO42−), using a modified AMX membrane, were established at different temperatures (from 283 to 313 K), with a constant total concentration of 0.3 mol/L and neutral pH. The results obtained with the modified membrane in this range of temperature show that chloride was the most sorbed and the selectivity order was Cl− > NO3− > SO42−. Selectivity coefficients and thermodynamic equilibrium constants, determined for the three binary systems, increased with increasing temperature. These results were compared with those obtained with the unmodified membrane. It was observed that for the modified membrane, the selectivity towards sulphate ion decreased and the modified membrane became more selective towards monovalent anions. Ion exchange equilibrium at temperatures 283, 298 and 313 K of the studied binary systems were found to be endothermic processes.

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Recent Advances in Ion Exchange Membranes for Desalination Applications

Klaysom

Ladewig

et al. 2013

Functional Nanostructured Materials and Membranes for Water Treatment

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Modification of properties of ion exchange membranes V. Structure of cationic polyelectrolyte on the surface of cation exchange membranes

Cited by 23 publications

References 21 publications

Ion Exchange Equilibrium between DOWEX 1X8 Resin Modified by Polyethyleneimine and Electrolyte Solutions

Ion Exchange Equilibrium between DOWEX 1X8 Resin Modified by Polyethyleneimine and Electrolyte Solutions

Modification of the AMX membrane surface: Temperature dependence of anion exchange equilibrium

Recent Advances in Ion Exchange Membranes for Desalination Applications

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