Boron removal by liquid‐phase polymer‐based retention technique using poly(glycidyl methacrylate <i>N</i>‐methyl <scp>D</scp>‐glucamine)

Sánchez, Julio; Rivas, Bernabé L.; Nazar, Eliza; Bryjak, Marek; Kabay, Nalan

doi:10.1002/app.38851

Cited by 23 publications

(21 citation statements)

References 37 publications

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“…Experiments were performed using different concentrations (15,30 and 60 mg/L) of As(V) and Cr(VI) in the feed. This study showed that the removal capacity increased, as the concentration of oxy-anions in the cell was lower (15 mg/L) (see Fig.…”

Section: Effect Of the Concentration Of As(v) And Cr(vi) In Retentionmentioning

confidence: 99%

“…In the system of ultrafiltration, the membrane acts as a barrier of molecular size; however, the pore size is too large to retain metal ions without their being in colloidal form [14]. The formation of polymer-metal species of high molecular weight leads to the retention of metal ions [14,15]. The LiquidPhase Polymer-based Retention (LPR) technique is based on this principle.…”

Section: Introductionmentioning

confidence: 99%

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Water-Soluble Cationic Cellulose Coupled to a Ultrafiltration Membrane for the Removal of Arsenic and Chromium

Sánchez¹,

Toledo²,

Rivas³

et al. 2013

J. Chil. Chem. Soc.

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This article describes the retention properties of arsenic (V) and chromium (VI) using a water-soluble polymer based on cationic hydroxyethylcellulose and combined with an ultrafiltration membrane. The polymer was purchased commercially and was characterized by Fourier transform infrared spectroscopy (FTIR). The study of polymer removal capacity of As(V) and Cr(VI) were performed by liquid-phase polymer-based retention technique (LPR). By means of a washing method studied retention as a function of pH, the amount of polymer, and the concentration of As(V) and Cr(VI).The results showed that the retention capacity of both oxy-anions increases with the solution pH. Due to the presence of quaternary ammonium groups in the polymer structure, the retention of As(V) and Cr(VI) was higher at a pH of 9 than that at acidic pH levels, reaching values of 65% for Cr(VI) and 43% for As(V). The study in function of amount of polymer showed that using 75 mg the retention of As(V) was 65%. In the case of Cr(VI) using 50 mg of polymer, 67% retention was obtained. Using low concentrations for arsenic and chromium, maximum retention was found at 65% and 95%, respectively.The maximum retention capacity (MRC) of the polymer was determined by adding As(V) and Cr(VI) to the polymer solution and concentrating in successive steps. FTIR spectra before and after of retention showed differences by the interaction with oxy-anions.

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Section: Effect Of the Concentration Of As(v) And Cr(vi) In Retentionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Water-Soluble Cationic Cellulose Coupled to a Ultrafiltration Membrane for the Removal of Arsenic and Chromium

Sánchez¹,

Toledo²,

Rivas³

et al. 2013

J. Chil. Chem. Soc.

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“…Recently, the separation of toxic inorganic species has been investigated by a hybrid method using membranes coupled to water-soluble functional polymers [13]. This method is known as the liquid-phase polymer-based retention (LPR) technique [12][13][14][15][16][17][18][19][20][21][22].…”

Section: Introductionmentioning

confidence: 99%

“…This method is known as the liquid-phase polymer-based retention (LPR) technique [12][13][14][15][16][17][18][19][20][21][22]. In the LPR, a water-soluble polymer solution and metal ion solution are contacted on the feed-side in a filtration system.…”

Section: Introductionmentioning

confidence: 99%

“…The great advantage of the LPR method is that it is performed in homogeneous media and largely avoids the phenomenon of mass transfer or diffusion that occurs with heterogeneous methods [16]. Through LPR, it is possible to separate a series of metal cations, as well as toxic inorganic anions such as arsenates and chromates from aqueous solution [13]. However, just few examples related to aluminum removal from aqueous solution by LPR-washing method are described in the literature [21,22].…”

Section: Introductionmentioning

confidence: 99%

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Removal of Metal Ions From Bío Bío River Water by Liquid-Phase Polymer-Based Retention Technique

Pereira

Homper

Sánchez

et al. 2015

J. Chil. Chem. Soc.

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Water-soluble poly(2-acrylamidoglycolic acid) (PAAG) was synthesized by radical polymerization and characterized by FTIR spectroscopy and potentiometric titration. Subsequently, this polymer was used as extracting reagent of metal ions using LPR technique, through washing and enrichment methods. By the washing method, the selective retention (100 %) of Al 3+ was obtained at pH 2.36. The removal of monovalent and divalent ions was maximum for all the metal ions at pH 5. The maximum retention capacity of some metal ions by PAAG was studied by enrichment method using water of Bío Bío river containing metal ions. The higher retention percentage for Al 3+ ion indicates that PAAG could be used as an extracting reagent for Al 3+ ions from Bío Bío river samples.

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Functionalized Porous Aromatic Frameworks as High‐Performance Adsorbents for the Rapid Removal of Boric Acid from Water

et al. 2019

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This study demonstrates that functionalized, highly porous polymers are promising for the adsorptive capture of boric acid, a neutral contaminant that is difficult to remove from seawater using conventional reverse osmosis membranes. Appending N‐methyl‐d‐glucamine (NMDG) to the pore walls of high‐surface‐area porous aromatic frameworks (PAFs) yields the adsorbents PAF‐1‐NMDG and P2‐NMDG in a simple two‐step synthesis. The boron‐selective PAFs demonstrate adsorption capacities that are up to 70% higher than those of a commercial boron‐selective resin, Amberlite IRA743, and markedly faster adsorption rates, owing to their higher NMDG loadings and greater porosities relative to the resin. Remarkably, PAF‐1‐NMDG is able to reduce the boron concentration in synthetic seawater from 2.91 to <0.5 ppm in less than 3 min at an adsorbent loading of only 0.3 mg mL−1. The boron adsorption rate constants of both frameworks, determined via a pseudo‐second‐order rate model, represent the highest values reported in the literature—in most cases orders of magnitude higher than those of other boron‐selective adsorbents. The frameworks can also be readily regenerated via mild acid/base treatment and maintain constant boron adsorption capacities for at least 10 regeneration cycles. These results highlight the numerous advantages of PAFs over traditional porous polymers in water treatment applications.

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Boron removal by liquid‐phase polymer‐based retention technique using poly(glycidyl methacrylate N‐methyl D‐glucamine)

Cited by 23 publications

References 37 publications

Water-Soluble Cationic Cellulose Coupled to a Ultrafiltration Membrane for the Removal of Arsenic and Chromium

Water-Soluble Cationic Cellulose Coupled to a Ultrafiltration Membrane for the Removal of Arsenic and Chromium

Removal of Metal Ions From Bío Bío River Water by Liquid-Phase Polymer-Based Retention Technique

Functionalized Porous Aromatic Frameworks as High‐Performance Adsorbents for the Rapid Removal of Boric Acid from Water

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