Removal of metal ions from aqueous solutions by sorption onto microcapsules prepared by copolymerization of ethylene glycol dimethacrylate with styrene

Araneda, Cristián; Fonseca, Carlos.; Sapag, Jaime; Basualto, Carlos; Yazdani‐Pedram, Mehrdad; Kondo, Kazuo; Kamio, Eiji; Valenzuela, Fernando

doi:10.1016/j.seppur.2008.06.010

Cited by 41 publications

(27 citation statements)

References 32 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Table 3 shows the results of applying both kinetic sorption models to the observed experimental values between 293 and 323 K. It is clear that the pseudo-second-order kinetic model fits the experimental data better. Thus, the microcapsules act as granular sorbents where the extractant, the active species in the sorption process, remains in the microspheres in a nearly pure state after the evaporation of the solvent [20]. This fact would explain the good agreement observed in Figure 5 between the experimental data and the values obtained using equation (7) (i.e., the pseudo-second-order kinetic model).…”

Section: Equilibrium Kinetic and Thermodynamic Sorption Experimentssupporting

confidence: 53%

“…In a previous paper, we reported the sorption of Cd(II) and Cu(II) from aqueous solutions using microcapsules containing a non-specific phosphonic extractant in a matrix constituted by poly(ethylene glycol) dimethacrylate and polystyrene [20]. In another communication, we reported the microencapsulation of trioctylamine in a polymeric matrix synthesised from styrene and divinylbenzene for the purpose of taking up Zn(II) and Cu(II) from chloride-containing aqueous solutions [21].…”

Section: Introductionmentioning

confidence: 99%

“…The fundamental knowledge gained in this study will contribute to the understanding of the chemisorption process that governs the extraction of polluting metal ions from aqueous solutions by microencapsulated extractants. [20]. USP-grade benzoyl peroxide supplied by Sigma-Aldrich was used as the polymerisation initiator.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Zn(II) Sorption From Aqueous Solutions Using Polymeric MicrocapsulesContaining 2-Ethylhexylphosphonic Acid Mono-2-Ethylhexyl Ester

Valenzuela

Ide

Narváez

et al. 2014

SERDJ

View full text Add to dashboard Cite

Zn(II) sorption from aqueous solutions was studied on polymeric hydrophobic microcapsules (MCs) containing 2-ethylhexylphosphonic acid mono-2-ethylhexyl ester as the extractant (PC-88A). The microcapsules were synthesised by adding this extractant during in situ radical polymerisation using styrene and ethylene glycol dimethacrylate (EGDMA) as starting monomers and benzoyl peroxide as the polymerisation initiator. SEM analysis of the microcapsules indicated that they had a spherical shape and a rough surface. A set of experiments was designed to study Zn(II) sorption behaviour onto MCs using aqueous solutions containing 100 mg/L of Zn(II) with an initial pH of 4.0. A Langmuir isotherm model fitted the experimentally observed equilibrium sorption data well. Results of kinetics experiments conducted between 293 and 323 K were well explained by a pseudo-second order kinetic model with an activation energy of 43.27 kJ mol -1 .Calculated thermodynamic parameters revealed that the chemisorption process was spontaneous and exothermic. The observed negative entropy change indicated that the metal bound to the extractant on the surface of MCs would generate a moderately ordered structure.

show abstract

Section: Equilibrium Kinetic and Thermodynamic Sorption Experimentssupporting

confidence: 53%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Zn(II) Sorption From Aqueous Solutions Using Polymeric MicrocapsulesContaining 2-Ethylhexylphosphonic Acid Mono-2-Ethylhexyl Ester

Valenzuela

Ide

Narváez

et al. 2014

SERDJ

View full text Add to dashboard Cite

show abstract

“…To solve this problem, an effective extraction and preconcentration method is necessary. Preconcentration techniques including liquid-liquid extraction, cloud point extraction, coprecipitation, membrane filtration and solid phase extraction (SPE) are generally used by the researchers around the world [9][10][11][12][13][14].…”

Section: Introductionmentioning

confidence: 99%

Solid phase extraction of trace amounts of zinc and cadmium ions using perlite as a supper sorbent

Roushani¹,

Baghelani²,

Abbasi³

et al. 2016

Bull. Chem. Soc. Eth.

View full text Add to dashboard Cite

ABSTRACT.A novel method using a packed column with perlite as a new sorbent has been developed for preconcentration of trace amounts of zinc and cadmium prior to their determination by flame atomic absorption spectrometry. Several factors that may be affected on the solid phase extraction (SPE) process, such as pH, sample volume, flow rate, volume and concentration of eluent were studied and optimized. Linearity was maintained between 0.001-0.1 µg mL −1 for zinc, and 0.001-0.3 µg mL −1 for cadmium. Detection limits based on 3Sb for zinc and cadmium were 1.8 and 1.6 ng mL −1 , respectively. The relative standard deviations of eight replicate measurements of 0.02 µg mL −1 of zinc and 0.05 µg mL −1 of cadmium ions were 2.1% and 1.8%, respectively. Finally, the developed method was successfully applied to extraction and determination of the zinc and cadmium ions in the water and food samples and satisfactory results were obtained.

show abstract

“…The same methodology was used by Shiomori et al in an extraction equilibrium study of precious metals from aqueous acidic solutions using microspheres constituted by a divinylbenzene polymeric matrix and a ternary amine-type extractant 13 . In a previous report, we studied the removal of Cd(II) and Cu(II) from aqueous solutions by sorption onto microcapsules prepared by copolymerizing ethylene glycol dimethacrylate and styrene 14 . The microcapsules were prepared by an in situ radical polymerization method by adding the extractant compound, 2-ethylhexy phosphonic acid mono-2-ethylhexyl ester, and the monomers to the continuous aqueous phase.…”

Section: Introductionmentioning

confidence: 99%

MICROENCAPSULATION OF TRIOCTYLAMINE IN POLYMERIC MATRICES FOR REMOVING Zn(II) AND Cu(II) FROM CHLORIDE AQUEOUS SOLUTIONS

Fonseca

Araneda

Yazdani‐Pedram

et al. 2010

J. Chil. Chem. Soc.

View full text Add to dashboard Cite

The microencapsulation of the non-specific basic extractant trioctylamine in polymeric matrices synthesized from styrene and divinylbenzene was studied. The microcapsules were prepared by adding the amine compound during in situ free radical suspension polymerization using benzoyl peroxide as the initiator and using variable proportions of both monomers. SEM analysis shows that the microcapsules have a spherical shape presenting an average surface area of 480 m 2 g -1 and a pore size around 0.5 to 1.8 nm. Synthesis of the microspheres was affected by the amount of extractant used and by the proportion of both monomers during their preparation.The obtained microcapsules were used for the sorptive removal of Zn(II) and Cu(II) ions from chloride aqueous solutions, reaching extraction extents near 90% under the best conditions, following an anion-exchange mechanism between the metallic ions and the extractant immobilized onto the microcapsules. Zn(II) and Cu(II) sorption kinetics experiments were performed and efficient uptake of both metals within a few minutes was measured. The experimental results were explained using a pseudo-second-order rate kinetics model, which fit the results of chemisorption of both metals onto the microcapsules well.

show abstract

Removal of metal ions from aqueous solutions by sorption onto microcapsules prepared by copolymerization of ethylene glycol dimethacrylate with styrene

Cited by 41 publications

References 32 publications

Zn(II) Sorption From Aqueous Solutions Using Polymeric MicrocapsulesContaining 2-Ethylhexylphosphonic Acid Mono-2-Ethylhexyl Ester

Zn(II) Sorption From Aqueous Solutions Using Polymeric MicrocapsulesContaining 2-Ethylhexylphosphonic Acid Mono-2-Ethylhexyl Ester

Solid phase extraction of trace amounts of zinc and cadmium ions using perlite as a supper sorbent

MICROENCAPSULATION OF TRIOCTYLAMINE IN POLYMERIC MATRICES FOR REMOVING Zn(II) AND Cu(II) FROM CHLORIDE AQUEOUS SOLUTIONS

Contact Info

Product

Resources

About