Ion-exchange polyHIPE type membrane for removing nitrate ions: Preparation, characterization, kinetics and adsorption studies

Alikhani, Mahsa; Moghbeli, Mohammad Reza

doi:10.1016/j.cej.2013.11.013

Cited by 73 publications

(33 citation statements)

References 35 publications

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“…Therefore, ion conductivity and alkaline stability gradually decline in alkaline environment. Glycidyl methacrylate monomer, vinylbenzyl chloride monomer, and divinyl benzene monomer have been studied as alternatives to improve chemical stability for anion exchange membrane [10,11]. Glycidyl methacrylate (GMA) monomer contains acrylic and epoxy, and provides good flexibility in polymer structure.…”

Section: Introductionmentioning

confidence: 99%

Characterization of Anion Exchange Membrane Containing Epoxy Ring and C–Cl Bond Quaternized by Various Amine Groups for Application in Fuel Cells

et al. 2015

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Anion exchange membranes were synthesized from different compositions of glycidyl methacrylate (GMA) and vinylbenzyl chloride (VBC), with constant content of divinyl benzene (DVB) by radical polymerization using benzoyl peroxide (BPO) on non-woven polyethylene terephthalate (PET) substrate. Polymerized membranes were then quaternized by soaking in trimethylamine (TMA), triethylamine (TEA), tripropylamine (TPA), and 1,4-diazabicyclo [2.2.2] octane (DABCO). Characteristics of membranes were confirmed by Fourier transform infrared spectroscopy, water uptake, ion exchange capacity, ion conductivity, thermal, and alkaline stability. The results revealed that membranes quaternized by TPA and DABCO showed high affinity when GMA content was 15 wt% and 75 wt%, respectively. IEC and ion conductivity of membranes quaternized by TPA were 1.34 meq·g (at 60 °C), respectively. The results indicate that the membrane containing GMA 15 wt% quaternized by TPA showed the highest thermal stability among membranes and exhibited high ion conductivity compared to existing researches using GMA, VBC, and DVB monomers.

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Section: Introductionmentioning

confidence: 99%

Characterization of Anion Exchange Membrane Containing Epoxy Ring and C–Cl Bond Quaternized by Various Amine Groups for Application in Fuel Cells

et al. 2015

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“…The adsorption isotherm is the equilibrium relationship between the ion concentration in the aqueous solution and the solid phases . The Langmuir and Redlich‐Peterson (R‐P) models were used to analyze experimental data using nonlinear equations given in Table .…”

Section: Resultsmentioning

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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“…The amount of nitrogen fixation per annum on the earth is much more than the amount of nitrogen by denitrification, which can lead to accumulation of nitrate nitrogen in the water (Mischler et al 2014). The limit of nitrate was no more than 50 mg/L in drinking water (Alikhani and Moghbeli 2014). Pouring too much nutrients into the water would lead to eutrophication and even cause health problems to animal and human.…”

Section: Introductionmentioning

confidence: 99%

“…Ammonium functional group adsorbents had been utilized for pollutant removal from aqueous solution in recent years (Alikhani and Moghbeli 2014;Hekmatzadeh et al 2013). Therefore, in this study, a novel pyridinium-functionalized magnetic adsorbent was designed and synthesized by surface modification of Fe 3 O 4 @SiO 2 for nitrate removal.…”

Section: Introductionmentioning

confidence: 99%

Preparation of Pyridinium-Functionalized Magnetic Adsorbent and Its Application for Nitrate Removal from Aqueous Solution

Wang

et al. 2015

Water Air Soil Pollut

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A novel magnetic pyridinium-functionalized mesoporous silica adsorbent (Fe 3 O 4 @SiO 2 @Py-Cl) was synthesized for nitrate removal from aqueous solutions. The adsorption performances were investigated by varying experimental conditions such as pH, contact time, and initial concentration. The adsorbent was characterized by transmission electron microscopy (TEM), X-ray photoelectron spectroscopy (XPS), Fourier transform infrared (FT-IR) spectroscopy, and magnetic hysteresis loops. The results showed that the adsorption equilibrium could be reached within 30 min and the kinetic data were fitted well by pseudo-second-order and intraparticle diffusion model. The adsorbent exhibited a favorable performance, and its maximum adsorption capacity calculated by the Langmuir isotherm model was 1.755 mmol/g. The nitrate adsorption mechanism was mainly controlled by the material through ion exchange of nitrate with chloridion, as determined by XPS. This study indicated that this novel pyridinium-functionalized mesoporous material had excellent adsorption capacity. Meanwhile, compared with other adsorbents, it could remove nitrate fast and easy to be collected by magnetic separation, showing great potential application for nitrate removal from aqueous solution.

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Ion-exchange polyHIPE type membrane for removing nitrate ions: Preparation, characterization, kinetics and adsorption studies

Cited by 73 publications

References 35 publications

Characterization of Anion Exchange Membrane Containing Epoxy Ring and C–Cl Bond Quaternized by Various Amine Groups for Application in Fuel Cells

Characterization of Anion Exchange Membrane Containing Epoxy Ring and C–Cl Bond Quaternized by Various Amine Groups for Application in Fuel Cells

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

Preparation of Pyridinium-Functionalized Magnetic Adsorbent and Its Application for Nitrate Removal from Aqueous Solution

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