Polyelectrolyte ultrafiltration of multivalent ions. Removal of copper(2+) by sodium poly(styrenesulfonate)

Sasaki, Kazuya; Burnett, Susan L.; Christian, Sherril D.; Tucker, Edwin E.; Scamehorn, John F.

doi:10.1021/la00086a013

Cited by 67 publications

(34 citation statements)

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“…[43]). The SPBs may be used to remove multivalent ions in the treatment of radioactive waste water [45]. However, such applications require the precise control of particle stability.…”

Section: Introductionmentioning

confidence: 99%

Surface potential of spherical polyelectrolyte brushes in the presence of trivalent counterions

Hoffmann

Jusufi

Schneider

et al. 2009

Journal of Colloid and Interface Science

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“…[43]). The SPBs may be used to remove multivalent ions in the treatment of radioactive waste water [45]. However, such applications require the precise control of particle stability.…”

Section: Introductionmentioning

confidence: 99%

Surface potential of spherical polyelectrolyte brushes in the presence of trivalent counterions

Hoffmann

Jusufi

Schneider

et al. 2009

Journal of Colloid and Interface Science

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“…The rejection (Rx) was calculated using equation 1 from permeate and retentate concentrations measured at the midpoint of each run; that is, after 100 mL of permeate was collected. The semi-equilibrium dialysis (SED) method has been used as described previously (8,77,(74)(75)(76)(24)(25)(26)(27)(28)(29). Regenerated cellulose acetate membranes (Fisher) with an average MWCO of 6000 were soaked in deionized water for 24 hours prior to use.…”

Section: Methodsmentioning

confidence: 99%

“…However, we also use the semi-equilibrium dialysis (SED) technique which has been developed in our laboratory as a simple experimental method for investigating both solubilization of organic species in surfactant micelles and the binding or expulsion of ions by micelles. Since MEUF processes are equilibrium-controlled, rather than kinetically-controlled; the results of simple SED experiments can be used to predict the effectiveness of ultrafiltration (UF) purification processes for rejected species (8,(24)(25)(26)(27)(28)(29).…”

Section: Rx (%) = {!-( [Xlper / [Xlret ) } X 100mentioning

confidence: 99%

Use of Ligand-Modified Micellar-Enhanced Ultrafiltration to Selectively Remove Copper from Water

Shadizadeh

Taylor

Schovanec

et al. 1999

ACS Symposium Series

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The effectiveness of the ligand 4-hexadecyloxybenzyliminodiacetic acid (C 16 BIDA) for the selective removal of Cu 2+ from aqueous solutions using Ugand-modified micellar-enhanced ultrafiltration (LM-MEUF) has been investigated. The cationic surfactant N-hexadecylpyridinium chloride (CPC) was used as the added colloid. Stirred cell ultrafiltration (UF) and semi-equilibrium dialysis (SED) methods were used to determine the effects of solution composition on the rejection of copper ions. The parameters studies include the concentrations of Cu 2+ , ligand, Ca 2+ , surfactant, and NaCl in the initial (feed) solution for UF and SED experiments and the applied pressure in the UF experiments. In solutions containing 100 mM CPC at pH 5.5, predominately 1:2 metal-ligand complexes are formed. Rejections of copper of up to 99.8% are observed, with almost no rejection of calcium, demonstrating the excellent selectivity and separation efficiency of C16BIDA in LM-MEUF. SED experiments showed that the ligand can be recovered for recycling by acid-stripping at pH 2.Surfactant-based separation processes are a class of chemical engineering separations that have great potential for removal and/or recovery of heavy metals and organic pollutants from water streams (7,2). Surfactant-based separation processes can require less energy, be less expensive, and have less environmental impact than traditional separation methods.Micellar-enhanced ultrafiltration (MEUF) is a surfactant-based separation technique that can be used to remove metal ions and/or dissolved organics from aqueous streams. In MEUF, the surfactant is present at a concentration well above its critical micelle concentration (CMC), so most of the surfactant is present as micelles. The micelles are roughly spherical aggregates containing about 50 to 150 surfactant molecules (3). The hydrocarbon chains of the surfactant fill the micelle interior making this core hydrophobic, and the hydrophilic portions of the surfactant are situated at the micelle surface. Cationic multivalent metal ions adsorb or bind to the surface of negatively charged micelles of an anionic surfactant while organic solutes tend to Corresponding author. 280

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“…Neither the structure nor the aggregation state of those molecules is clearly stated. In some cases also, interaction with metal ions is studied with polyelectrolytes [2][3][4] exhibiting no particular hydrophobic microscopic domains, the status of the macromolecule (coiled or uncoiled) not being clearly stated. This review will only take into account partially hydrophobic polymer covalently grafted with complexing functions.…”

Section: Conditions Necessary To Extract Metal Ion From Watermentioning

confidence: 99%

Metal ion extraction in microheterogeneous systems

Hébrant

2009

Coordination Chemistry Reviews

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Polyelectrolyte ultrafiltration of multivalent ions. Removal of copper(2+) by sodium poly(styrenesulfonate)

Cited by 67 publications

References 0 publications

Surface potential of spherical polyelectrolyte brushes in the presence of trivalent counterions

Surface potential of spherical polyelectrolyte brushes in the presence of trivalent counterions

Use of Ligand-Modified Micellar-Enhanced Ultrafiltration to Selectively Remove Copper from Water

Metal ion extraction in microheterogeneous systems

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