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Transport and retention of colloidal aggregates of C60 in porous media: effects of organic macromolecules, ionic composition, and preparation method.

Publication ,  Journal Article
Espinasse, B; Hotze, EM; Wiesner, MR
Published in: Environmental science & technology
November 2007

The physical-chemical behavior of the fullerene C60 in environmental and physiological media is of interest for understanding the potential transport, exposure, and impacts of these materials on organisms and ecosystems. We considerthe role of electrolyte composition and concentration, the effect of organic macromolecules, and the mode of preparation of colloidal aggregates of C60 (nC60) on the deposition of these colloids in a porous medium such as a groundwater aquifer or a water treatment filter. Results for nC60 deposition are qualitatively consistent with trends anticipated by theory. Deposition was found to increase with increasing ionic strength, the presence of polysaccharide-type organic matter, and lower Darcy velocities. Factors that will tend to decrease the retention of these materials in porous media include a low ionic strength and the presence of humic-like substances, while the ionic strengths typical of many natural waters and the presence polysaccharide-based natural organic matter, as may be produced by algae or bacteria, will tend to favor deposition and reduced potential for exposure. Variability in the method of preparing colloidal aggregates of fullerenes was observed to yield significant differences in nC60 properties and transport behavior.

Duke Scholars

Published In

Environmental science & technology

DOI

EISSN

1520-5851

ISSN

0013-936X

Publication Date

November 2007

Volume

41

Issue

21

Start / End Page

7396 / 7402

Related Subject Headings

  • Water Pollutants, Chemical
  • Tannins
  • Sodium Chloride
  • Porosity
  • Osmolar Concentration
  • Hexuronic Acids
  • Glucuronic Acid
  • Furans
  • Fullerenes
  • Environmental Sciences
 

Citation

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Espinasse, B., Hotze, E. M., & Wiesner, M. R. (2007). Transport and retention of colloidal aggregates of C60 in porous media: effects of organic macromolecules, ionic composition, and preparation method. Environmental Science & Technology, 41(21), 7396–7402. https://doi.org/10.1021/es0708767
Espinasse, Benjamin, Ernest M. Hotze, and Mark R. Wiesner. “Transport and retention of colloidal aggregates of C60 in porous media: effects of organic macromolecules, ionic composition, and preparation method.Environmental Science & Technology 41, no. 21 (November 2007): 7396–7402. https://doi.org/10.1021/es0708767.
Espinasse, Benjamin, et al. “Transport and retention of colloidal aggregates of C60 in porous media: effects of organic macromolecules, ionic composition, and preparation method.Environmental Science & Technology, vol. 41, no. 21, Nov. 2007, pp. 7396–402. Epmc, doi:10.1021/es0708767.
Espinasse B, Hotze EM, Wiesner MR. Transport and retention of colloidal aggregates of C60 in porous media: effects of organic macromolecules, ionic composition, and preparation method. Environmental science & technology. 2007 Nov;41(21):7396–7402.
Journal cover image

Published In

Environmental science & technology

DOI

EISSN

1520-5851

ISSN

0013-936X

Publication Date

November 2007

Volume

41

Issue

21

Start / End Page

7396 / 7402

Related Subject Headings

  • Water Pollutants, Chemical
  • Tannins
  • Sodium Chloride
  • Porosity
  • Osmolar Concentration
  • Hexuronic Acids
  • Glucuronic Acid
  • Furans
  • Fullerenes
  • Environmental Sciences