Characterization of iron nanoparticles stabilized for enhanced delivery to TCE source zones

Bahngmi Jung, Nataphan Sakulchaicharoen, Denis M. O'Carroll, Jose E. Herrera, Brent E. Sleep

Research output: Chapter in Book/Report/Conference proceedingConference contribution

1 Citation (Scopus)

Abstract

In-situ dechlorination by direct injection of zerovalent iron nanoparticles (NZVI) into the contaminated subsurface is a promising technology to treat chlorinated hydrocarbons including trichloroethylene (TCE). However one significant problem is the delivery of the reactive NZVI to the chlorinated solvent source zone where they can react. There are several reports in the literature indicating the use of different polymers to stabilize both commercially available and synthesized iron nanoparticles. However a systematic study on the ability of different polymers to form stable suspensions has yet to be presented. Moreover reports indicate that formulations used to achieve stable suspensions vary widely. This contribution investigates the ability of a variety of polymers (CMC, PSS, PAP, and GUAR) to stabilize NZVI synthesized from sodium borohydride reduction of ferrous iron (Fe/B) and commercially available nanoiron particles (RNIP). Results were interpreted in terms of iron particle size, surface area, viscosity and zeta potential. Stability of the obtained Fe nanoparticles suspensions depends on the concentration of the polymer in the solution, its molecular weight and nature of electrostatic and steric interactions between the polymer molecules themselves as well as between the iron nanoparticles and the polymer. Zeta potential of the particles was measured over a wide range of pH values (5 to 10) and ionic strengths (0.01 to 10mM), and size and structures of particles were investigated by Zetasizer and transmission electron microscopy (TEM). Selection of appropriate NZVI source and polymer type will be discussed, as they will depend on site conditions. These will be discussed with regards to optimum conditions selected for remediation at an industrial site with chlorinated hydrocarbon contamination.

Original languageEnglish
Title of host publicationAmerican Chemical Society - 237th National Meeting and Exposition, ACS 2009, Abstracts of Scientific Papers
Publication statusPublished - 2009
Externally publishedYes
Event237th National Meeting and Exposition of the American Chemical Society, ACS 2009 - Salt Lake City, UT, United States
Duration: 22 Mar 200926 Mar 2009

Other

Other237th National Meeting and Exposition of the American Chemical Society, ACS 2009
CountryUnited States
CitySalt Lake City, UT
Period22/3/0926/3/09

Fingerprint

Trichloroethylene
Polymers
Iron
Nanoparticles
Chlorinated Hydrocarbons
Suspensions
Zeta potential
Dechlorination
Direct injection
Ionic strength
Remediation
Electrostatics
Contamination
Molecular weight
Particle size
Sodium
Viscosity
Transmission electron microscopy
Molecules

ASJC Scopus subject areas

  • Chemistry(all)
  • Chemical Engineering(all)

Cite this

Jung, B., Sakulchaicharoen, N., O'Carroll, D. M., Herrera, J. E., & Sleep, B. E. (2009). Characterization of iron nanoparticles stabilized for enhanced delivery to TCE source zones. In American Chemical Society - 237th National Meeting and Exposition, ACS 2009, Abstracts of Scientific Papers

Characterization of iron nanoparticles stabilized for enhanced delivery to TCE source zones. / Jung, Bahngmi; Sakulchaicharoen, Nataphan; O'Carroll, Denis M.; Herrera, Jose E.; Sleep, Brent E.

American Chemical Society - 237th National Meeting and Exposition, ACS 2009, Abstracts of Scientific Papers. 2009.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Jung, B, Sakulchaicharoen, N, O'Carroll, DM, Herrera, JE & Sleep, BE 2009, Characterization of iron nanoparticles stabilized for enhanced delivery to TCE source zones. in American Chemical Society - 237th National Meeting and Exposition, ACS 2009, Abstracts of Scientific Papers. 237th National Meeting and Exposition of the American Chemical Society, ACS 2009, Salt Lake City, UT, United States, 22/3/09.
Jung B, Sakulchaicharoen N, O'Carroll DM, Herrera JE, Sleep BE. Characterization of iron nanoparticles stabilized for enhanced delivery to TCE source zones. In American Chemical Society - 237th National Meeting and Exposition, ACS 2009, Abstracts of Scientific Papers. 2009
Jung, Bahngmi ; Sakulchaicharoen, Nataphan ; O'Carroll, Denis M. ; Herrera, Jose E. ; Sleep, Brent E. / Characterization of iron nanoparticles stabilized for enhanced delivery to TCE source zones. American Chemical Society - 237th National Meeting and Exposition, ACS 2009, Abstracts of Scientific Papers. 2009.
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