Abstract

A series of experiments was performed to measure the retention of a class of functionalized nanoparticles (NPs) on porous (microfiltration and ultrafiltration) membranes. The findings impact engineered water and wastewater treatment using membrane technology, characterization and analytical schemes for NP detection, and the use of NPs in waste treatment scenarios. The NPs studied were composed of silver, titanium dioxide, and gold; had organic coatings to yield either positive or negative surface charge; and were between 2 and 10nm in diameter. NP solutions were applied to polymeric membranes composed of different materials and pore sizes (ranging from ~2nm [3kDa molecular weight cutoff] to 0.2μm). Greater than 99% rejection was observed of positively charged NPs by negatively charged membranes even though pore diameters were up to 20 times the NP diameter; thus, sorption caused rejection. Negatively charged NPs were less well rejected, but behavior was dependant not only on surface functionality but on NP core material (Ag, TiO 2, or Au). NP rejection depended more upon NP properties than membrane properties; all of the negatively charged polymeric membranes behaved similarly. The NP-membrane interaction behavior fell into four categories, which are defined and described here.

Original languageEnglish (US)
Pages (from-to)288-295
Number of pages8
JournalJournal of Hazardous Materials
Volume211-212
DOIs
StatePublished - Apr 15 2012

Fingerprint

Polymeric membranes
Nanoparticles
membrane
Membranes
nanoparticle
Membrane technology
Organic coatings
Microfiltration
Waste treatment
Water Purification
Ultrafiltration
waste treatment
Surface charge
Waste Water
ultrafiltration
Water treatment
Silver
Gold
Wastewater treatment
Titanium dioxide

Keywords

  • Adsorption
  • Fouling
  • Microfiltration
  • Separation
  • Ultrafiltration

ASJC Scopus subject areas

  • Health, Toxicology and Mutagenesis
  • Pollution
  • Waste Management and Disposal
  • Environmental Chemistry
  • Environmental Engineering

Cite this

Functionalized nanoparticle interactions with polymeric membranes. / Ladner, D. A.; Steele, M.; Weir, A.; Hristovski, Kiril; Westerhoff, Paul.

In: Journal of Hazardous Materials, Vol. 211-212, 15.04.2012, p. 288-295.

Research output: Contribution to journalArticle

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