Heterogeneous Cation Exchange Membrane: Preparation, Characterization and Comparison of Transport Properties of Mono and Bivalent Cations

Hosseini, S.M.; Madaeni, S.S.; Khodabakhshi, A.R.

doi:10.1080/01496395.2010.497792

Cited by 46 publications

(29 citation statements)

References 27 publications

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“…Also, it is not enough to know the transport characteristics of membranes, but it is also beneficial to predict the behavior of prepared membranes on the basis of their structural properties. Few reports are available on the investigation of electrolyte solutions' effects on IEMs properties in spite of the fact that they have significant influences (1,19,(21)(22)(23)(24). The study of electrochemical properties variation of IEMs with electrolytes concentrations and pH values is necessary due to the occurrence of concentration polarization phenomenon and the formation of boundary layers on the membrane surface and also the difference in membranes functional groups dissociations under different conditions.…”

Section: Introductionmentioning

confidence: 97%

“…In such processes, ions interaction happens in a complex fashion with membrane, water, and with each other. Knowledge of the electrokinetic properties of IEMs is a major contributing factor behind decisions about their applicability in specific processes because of their direct effect on the overall system performance (1,2,13,(18)(19)(20)(21). The behaviors of IEMs depend on their physico-chemical properties in addition to the nature of the used electrolyte solutions.…”

Section: Introductionmentioning

confidence: 99%

“…IEMs are efficient tools in desalting brackish waters, reconcentrating brine from seawater, production of table salt, recovery of valuable metals from effluents industries, and also in food and pharmacy processing like desalination of cheese whey and demineralization of sugarcane juice as well as manufacturing basic chemical products. Moreover, the ion exchange membranes play some important part in environmental protection, treating industrial and biological effluents and many more processes (1)(2)(3)(4)(5)(6)(7)(8)(9)(10)(11)(12)(13)(14). In IEMs, the charged groups attached to the polymer backbone are freely permeable to opposite sign ions under the influence of the electrical field (6,(15)(16)(17).…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

The Electrochemical Characterization of Ion Exchange Membranes in Different Electrolytic Environments: Investigation of Concentration and pH Effects

Hosseini

Madaeni

Khodabakhshi

2012

Separation Science and Technology

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In this research, the effect of electrolyte concentration and environmental pH variations on electrochemical properties of two commercial heterogeneous ion exchange membranes was studied. Membrane structure investigation was carried out using the SEM method. Obtained images showed that the anion-exchange membrane possesses a rough surface while the cation-exchange one has mainly a smooth surface with effect on ions transportation ability. Membrane potential, transport number, and permselectivity were initially improved in cation-exchange membrane with an increase of electrolyte concentration from 0.1 to 0.5 M and then began to decrease with higher concentration increase from 0.5 to 1.0 M. Also, membrane potential, transport number, and permselectivity were decreased in anion-exchange membrane with increase of electrolyte concentration. Results revealed that cation-exchange membrane had higher potential, transport number, and selectivity at pH 7 and the anion-exchange one showed better performance at pH 10 compared to other pH values. Membrane resistance was decreased in both membranes due to increase of electrolyte concentration. Resistance also increased initially with increase of pH value but then began to decrease with higher increase in pH value. Membranes exhibited higher selectivity for monovalent ions compared to bivalent one. The results demonstrate that the anion-exchange membrane has lower selectivity and electrical resistance compared to the cation-exchange membrane.

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Section: Introductionmentioning

confidence: 97%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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The Electrochemical Characterization of Ion Exchange Membranes in Different Electrolytic Environments: Investigation of Concentration and pH Effects

Hosseini

Madaeni

Khodabakhshi

2012

Separation Science and Technology

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“…The wet membrane was weighed (OHAUS, Pioneer TM , readability: 10 −4 gr, OHAUS Corp.) and then dried in oven at 60 o C until constant weight was obtained. Following equation [21][22][23][24][25]: (4) where W wet is the weight of wet membrane and W dry is the weight of dried membrane. To minimize the experimental errors, measurements were carried out three times for each sample, then their average value was reported.…”

Section: Water Contentmentioning

confidence: 99%

Physico-chemical characterization, morphology and performance of polyethersulfone based membrane for glycerol removal from biodiesel produced through trans-esterification of waste cooking oils

Farahani

Halek

Hosseini

2015

Korean J. Chem. Eng.

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In the current research, the biodiesel purification was by use of poly ether sulfone based membrane. The biodiesel was produced from waste cooking oils by trans-esterification. Membranes were fabricated by solution casting through phase inversion method. The effect of PES concentration in the casting solution on physico-chemical characteristics, morphology and performance of membranes in glycerol removal from produced biodiesel was studied. SEM and AFM analysis have been utilized for the membrane morphological characterization. SEM images showed uniform surface for the membranes. AFM analysis revealed that the membrane surface roughness was decreased by increase of polymer concentration. The membrane flux, water content and porosity were also decreased by increase of PES concentration. Moreover, obtained results showed that membrane glycerol rejection and mechanical strength were improved by increase of polymer binder concentration. The prepared membrane with 16%wt PES showed more appropriate performance compared to others.

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“…H + ions in solution were then titrated with 0.01 M NaOH and phenolphthalein indicator. The IEC is calculated from equations were discussed elsewhere [22][23][24][25][26][27][28][29].…”

Section: Determination Of Ionic Exchange Capacity (Iec)mentioning

confidence: 99%

Novelpolyvinyl Chloride-Grafted-Poly (Ethylene Imine) Membranes for Water Treatment Applications: Synthesis and Membrane Characterizations

Eldin¹

2015

AJAC

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Novel polyvinyl chloride grafted poly (ethylene imine), PVC-g-PEI membranes have been successfully synthesized by solvent evaporation technique using THF/ethanol as a solvent mixture. PEI was incorporated into PVC in different portions to increase the weak hydrophilicity of PVC membranes and to enhance physicochemical membranes surface properties. Membranes preparation conditions of PVC-g-PEI and their applications for water desalination process were optimized and discussed in details. PVC-g-PEI membranes were characterized by FTIR, morphologically using SEM, thermally using TGA&DSC, and mechanically using universal testing machine. Poly (ethylene glycol), PEG was then added to PVC-g-PEI membranes as a pore forming additive to increase pores density area and improve efficiency of the permeation flux of membranes. Addition of PEG portions increased permeation flux of PVC-g-PEI membranes2 ) and salt rejection performance for mono membrane (33.5%, 30.8%and 27.4 %) for 3%, 2% and 1% NaCl solutions, respectively. Ion Exchange Capacity (IEC) for (PVC-g-PEI) membrane was 2.3 meq/gm and water uptake was 23%.All filtration experiments results were carried out at a trans-membrane pressure of 0.3 MPa at room temperature. The results showed that the permeate quality and quantity almost stable upon long run, thus PVC-g-PEI membranes can be used effectively for water treatment applications e.g. Nano-filtration and desalination.

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Heterogeneous Cation Exchange Membrane: Preparation, Characterization and Comparison of Transport Properties of Mono and Bivalent Cations

Cited by 46 publications

References 27 publications

The Electrochemical Characterization of Ion Exchange Membranes in Different Electrolytic Environments: Investigation of Concentration and pH Effects

The Electrochemical Characterization of Ion Exchange Membranes in Different Electrolytic Environments: Investigation of Concentration and pH Effects

Physico-chemical characterization, morphology and performance of polyethersulfone based membrane for glycerol removal from biodiesel produced through trans-esterification of waste cooking oils

Novelpolyvinyl Chloride-Grafted-Poly (Ethylene Imine) Membranes for Water Treatment Applications: Synthesis and Membrane Characterizations

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