Water desalination by neutralization dialysis with ion-exchange membranes: Flow rate and acid/alkali concentration effects

Chérif, M.; Mkacher, I.; Dammak, L.; Salah, A. Ben; Walha, Khaled; Grande, Daniel; Nikonenko, Victor

doi:10.1016/j.desal.2015.01.024

Cited by 41 publications

(31 citation statements)

References 37 publications

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“…Given the electroneutrality the total counter-ion concentration in the electrode channel is given by (26) where N is the amount (mol) of Na + in the micropores of the carbon particles.…”

Section: Transport In Fcdi and Fcndmentioning

confidence: 99%

“…ND [24] is a membrane desalination process which is based on the simultaneous use of two Donnan dialysis operations, one against the acidic and the other against alkaline solution with cation-and anion-exchange membranes, respectively. Driven by the Donnan potential formed by the salt concentration difference across the membrane, the H + and OH -penetrating into the salt water compartment in exchange for salt ions annihilate in the neutralization reaction [25,26]. Through this process, salt water is traded for clean water.…”

Section: Introductionmentioning

confidence: 97%

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Capacitive neutralization deionization with flow electrodes

Wang

Hou

Liu

et al. 2016

Electrochimica Acta

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“…Given the electroneutrality the total counter-ion concentration in the electrode channel is given by (26) where N is the amount (mol) of Na + in the micropores of the carbon particles.…”

Section: Transport In Fcdi and Fcndmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 97%

Capacitive neutralization deionization with flow electrodes

Wang

Hou

Liu

et al. 2016

Electrochimica Acta

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“…It has been established that the efficiency of ND demineralization increases with a decrease in the intermembrane distance in the desalination compartment as well as with a decrease in the solution flow rate in the case of the direct-flow hydraulic mode [25]. If a batch hydraulic mode is used, on the contrary, it is necessary to increase the solution flow rate in order to reduce the diffusion boundary layer (DBL) thickness near the membrane surface [33,34]. The degree of extraction (or retention) of substances that enter the protolysis reactions depends on the values of the constants of these reactions and on the concentrations of acid and alkali [27,35] in the corresponding compartments of the ND stack.…”

Section: Introductionmentioning

confidence: 99%

Neutralization Dialysis for Phenylalanine and Mineral Salt Separation. Simple Theory and Experiment

et al. 2019

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A simple non-steady state mathematical model is proposed for the process of purification of an amino acid solution from mineral salts by the method of neutralization dialysis (ND), carried out in a circulating hydrodynamic mode. The model takes into account the characteristics of membranes (thickness, exchange capacity and electric conductivity) and solution (concentration and components nature) as well as the solution flow rate in dialyzer compartments. In contrast to the known models, the new model considers a local change in the ion concentration in membranes and the adjacent diffusion layers. In addition, the model takes into consideration the ability of the amino acid to enter the protonation/deprotonation reactions. A comparison of the results of simulations with experimental data allows us to conclude that the model adequately describes the ND of a strong electrolyte (NaCl) and amino acid (phenylalanine) mixture solutions in the case where the diffusion ability of amino acids in membranes is much less, than mineral salts. An example shows the application of the model to predict the fluxes of salt ions through ion exchange membranes as well as pH of the desalination solution at a higher than in experiments flow rate of solutions in ND dialyzer compartments.

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“…The increasing levels of nitrates, sulphates, and chlorides in waters and their harmful effects on health and the environment require us to find technologies that present a solution to this problem . In this context, ion exchange membranes have been used, since their development by Juda in 1949, in various fields particularly in the field of treatment and purification of water …”

Section: Introductionmentioning

confidence: 99%

“…[1][2] In this context, ion exchange membranes have been used, since their development by Juda in 1949, [3] in various fields particularly in the field of treatment and purification of water. [4][5][6][7] Several works have been done to improve the ion exchange membrane selectivity towards monovalent ions. [8][9][10][11][12][13][14][15][16][17][18][19] Sata et al [8][9][10] studied the change of the membrane proprieties by its modification using various methods such as the increase of the cross-linkage of the ion exchange membranes, the forming of tight surface layers on the ion exchange membranes, and the addition of some surfactants to the solutions.…”

Section: Introductionmentioning

confidence: 99%

Modification of the AMX membrane surface by polyethyleneimine: Effect of ionic strength on the membrane ion exchange selectivity

et al. 2016

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In order to improve the selectivity of the AMX membrane, a polyethyleneimine (PEI) layer was adsorbed on its surface by the immersion of the considered membrane in a solution of PEI. The adsorption process of PEI was studied and the results were well correlated with the Langmuir model and with Lagergren's pseudo‐first‐order kinetic model. Equilibrium ion exchange isotherms of (Cl−/normalNO3−), (Cl−/normalSO42−), and (normalNO3−/normalSO42−) systems, using modified AMX membrane, were established at various ionic strengths from 0.1 to 0.5 mol/L and at constant temperature of 298 K. The results obtained with the modified membrane, in this range of ionic strengths, showed that the affinity order was: NnormalO3−>Cl−>SnormalO42− at I = 0.1 mol/L and I = 0.2 mol/L and it was Cl−>NnormalO3−>SnormalO42− for I = 0.3 mol/L and I = 0.5 mol/L. The ion exchange selectivity coefficients normalKnormalAnormalB, thermodynamic ion exchange equilibrium constants normalKnormalA°B, and the standard free enthalpies normalΔrG° of the ion exchange reactions were determined for the three binary systems. These results were compared with those obtained with the unmodified membrane. It was observed that for the modified membrane the ion exchange selectivity towards sulphate ions decreased and increased towards monovalent anions.

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Water desalination by neutralization dialysis with ion-exchange membranes: Flow rate and acid/alkali concentration effects

Cited by 41 publications

References 37 publications

Capacitive neutralization deionization with flow electrodes

Capacitive neutralization deionization with flow electrodes

Neutralization Dialysis for Phenylalanine and Mineral Salt Separation. Simple Theory and Experiment

Modification of the AMX membrane surface by polyethyleneimine: Effect of ionic strength on the membrane ion exchange selectivity

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