New purification technique for the removal of organics from aqueous solutions using silicone polymers

Andrews, Anthony R. J.; Zlatkis, A.; Tang, Mingshu; Zhang, Wensheng; Shanfield, H.

doi:10.1021/es00043a013

Cited by 12 publications

(6 citation statements)

References 14 publications

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“…Jones et al ( 1993) presented a hydraulic model for continuous-flow hollowfiber ultrafiltration systems under both fouling and nonfouling conditions. Silicon polymers in the form of hollow fiber membranes were used to remove organic contaminants from aqueous solutions (Andrews et al. 1993).…”

Section: Membrane Processesmentioning

confidence: 99%

Physicochemical processes

Matsumoto¹,

Jensen²,

McGinley³

et al. 1994

Water Environment Research

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Section: Membrane Processesmentioning

confidence: 99%

Physicochemical processes

Matsumoto¹,

Jensen²,

McGinley³

et al. 1994

Water Environment Research

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“…However, the difficulties associated with the regeneration of carbon and low mechanical strength make this technology less attractive. 39 Another promising technology, solvent extraction, 40,41 also suffers from drawbacks, including emulsification with the feed phase, and counter-contamination of the feed by the solvent. This motivates the need for the development of new techniques for removal of organic compounds from aqueous solutions.…”

Section: Introductionmentioning

confidence: 99%

Redox-Responsive Gels with Tunable Hydrophobicity for Controlled Solubilization and Release of Organics

Akhoury

Bromberg

Hatton

2011

ACS Appl. Mater. Interfaces

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The hydrophobicity of the chemical environment within a redox-responsive polymer gel synthesized by copolymerization of hydroxybutyl methacrylate (HBMA) and vinylferrocene (VF) can be controlled by tuning the oxidation state of the redox-responsive moiety, ferrocene. When ferrocene is in the uncharged reduced state, the gel is hydrophobic and selectively extracts butanol from aqueous solution. Upon oxidation to ferricenium ions, charge is induced at the ferrocene sites making the gel hydrophilic, with a reduced capacity for butanol relative to water. Equilibrium distribution coefficients and separation factors provide quantitative evidence for this changing preference for butanol depending on oxidation state. The selection of the monomer constituting the polymer backbone, HBMA, was based on an initial screening using the Hansen solubility parameters of commercially available monomers. The effect of the various constituents of the gel on the gel's butanol extraction ability has been ascertained experimentally.

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“…Trihalomethanes (THMs) are among the principal DBPs of concern with respect to their effects on health 1. The technologies available for removing DBPs from water include granular activated carbon (GAC) adsorption, biological degradation, distillation, air stripping, ozone oxidation, reverse osmosis, and pervaporation 2–8. Another option for removing DBP from water may be a combination of adsorption and absorption, hereafter referred to as sorption, by porous polymeric absorbents contained in a packed column 9–13…”

Section: Introductionmentioning

confidence: 99%

Polymerized high internal phase emulsions containing a porogen: Specific surface area and sorption

Sergienko

Tai

Narkis

et al. 2004

J of Applied Polymer Sci

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ABSTRACT:Highly porous, open-cell polymers [poly-(HIPE)] were prepared by polymerizing the monomers in the continuous phase (ϳ 10%) of high internal phase emulsions (HIPE). This paper discusses using poly(HIPE) to remove bromoform from an aqueous solution through sorption, a combination of adsorption and absorption. The crosslinked polystyrene (xPS) and crosslinked poly(ethylhexyl acrylate) (xPEHA) had cell diameters from 1.5 to 15 m, intercellular pore diameters from 0.3 to 1.5 m, and densities of about 0.10 g/cc. The specific surface area of the glassy xPS increased from 7.9 to 28.8 m 2 /g on extraction in methanol, most likely due to crazing. The use of a toluene porogen in the xPS (xPS-T) reduced the density to 0.05 g/cc and yielded a rough surface with nanoscale porosity and a specific surface area of 132 m 2 /g. xPS and xPEHA, with very different molecular structures but with similar specific surface areas, exhibited similar sorption behavior. Extraction produced increases in the xPS and xPS-T sorption plateaus and sorption capacities. For larger specific surface areas, the sorption at low concentrations was relatively independent of concentration, indicating a case of adsorption with the sites occupied. For all the other cases, absorption seems to dominate and sorption is more strongly dependent upon concentration.

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New purification technique for the removal of organics from aqueous solutions using silicone polymers

Cited by 12 publications

References 14 publications

Physicochemical processes

Physicochemical processes

Redox-Responsive Gels with Tunable Hydrophobicity for Controlled Solubilization and Release of Organics

Polymerized high internal phase emulsions containing a porogen: Specific surface area and sorption

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