Remediation of trichloroethylene by fes-coated iron nanoparticles in simulated and real groundwater: Effects of water chemistry

Eun Ju Kim; Kumarasamy Murugesan; Jae Hwan Kim; Paul G. Tratnyek; Yoon Seok Chang

doi:10.1021/ie400165a

Remediation of trichloroethylene by fes-coated iron nanoparticles in simulated and real groundwater: Effects of water chemistry

Eun Ju Kim, Kumarasamy Murugesan, Jae Hwan Kim, Paul G. Tratnyek, Yoon Seok Chang

Center for Coastal Margins

Research output: Contribution to journal › Article › peer-review

124 Scopus citations

Abstract

The reactivity of FeS-coated iron nanoparticles (nFe/FeS) toward trichloroethylene (TCE) reduction was examined in both synthetic and real groundwater matrices to evaluate the potential performance of nFe/FeS in field treatment. The rate of TCE reduction increased with increasing pH, which is consistent with the pH effect reported previously for iron sulfide systems, but opposite that has been observed for (nonsulfidic) Fe⁰ systems. The rates of TCE reduction were unaffected by ionic strength over the range of 0.1-10 mM NaCl, increased with Ca²⁺ or Mg²⁺ concentrations, and inhibited by the presence of humic acid. The inhibitory effect of humic acid on the reactivity of nFe/FeS was largely alleviated when humic acid was combined with Ca²⁺/Mg²⁺, presumably due to decreased adsorption of humic acid onto nFe/FeS surface by the formation of humic acid-Ca²⁺/Mg²⁺ complexes.

Original language	English (US)
Pages (from-to)	9343-9350
Number of pages	8
Journal	Industrial and Engineering Chemistry Research
Volume	52
Issue number	27
DOIs	https://doi.org/10.1021/ie400165a
State	Published - Jul 10 2013

ASJC Scopus subject areas

Chemistry(all)
Chemical Engineering(all)
Industrial and Manufacturing Engineering

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title = "Remediation of trichloroethylene by fes-coated iron nanoparticles in simulated and real groundwater: Effects of water chemistry",

abstract = "The reactivity of FeS-coated iron nanoparticles (nFe/FeS) toward trichloroethylene (TCE) reduction was examined in both synthetic and real groundwater matrices to evaluate the potential performance of nFe/FeS in field treatment. The rate of TCE reduction increased with increasing pH, which is consistent with the pH effect reported previously for iron sulfide systems, but opposite that has been observed for (nonsulfidic) Fe0 systems. The rates of TCE reduction were unaffected by ionic strength over the range of 0.1-10 mM NaCl, increased with Ca2+ or Mg2+ concentrations, and inhibited by the presence of humic acid. The inhibitory effect of humic acid on the reactivity of nFe/FeS was largely alleviated when humic acid was combined with Ca2+/Mg2+, presumably due to decreased adsorption of humic acid onto nFe/FeS surface by the formation of humic acid-Ca2+/Mg2+ complexes.",

author = "Kim, {Eun Ju} and Kumarasamy Murugesan and Kim, {Jae Hwan} and Tratnyek, {Paul G.} and Chang, {Yoon Seok}",

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T2 - Effects of water chemistry

AU - Kim, Eun Ju

AU - Murugesan, Kumarasamy

AU - Kim, Jae Hwan

AU - Tratnyek, Paul G.

AU - Chang, Yoon Seok

PY - 2013/7/10

Y1 - 2013/7/10

N2 - The reactivity of FeS-coated iron nanoparticles (nFe/FeS) toward trichloroethylene (TCE) reduction was examined in both synthetic and real groundwater matrices to evaluate the potential performance of nFe/FeS in field treatment. The rate of TCE reduction increased with increasing pH, which is consistent with the pH effect reported previously for iron sulfide systems, but opposite that has been observed for (nonsulfidic) Fe0 systems. The rates of TCE reduction were unaffected by ionic strength over the range of 0.1-10 mM NaCl, increased with Ca2+ or Mg2+ concentrations, and inhibited by the presence of humic acid. The inhibitory effect of humic acid on the reactivity of nFe/FeS was largely alleviated when humic acid was combined with Ca2+/Mg2+, presumably due to decreased adsorption of humic acid onto nFe/FeS surface by the formation of humic acid-Ca2+/Mg2+ complexes.

AB - The reactivity of FeS-coated iron nanoparticles (nFe/FeS) toward trichloroethylene (TCE) reduction was examined in both synthetic and real groundwater matrices to evaluate the potential performance of nFe/FeS in field treatment. The rate of TCE reduction increased with increasing pH, which is consistent with the pH effect reported previously for iron sulfide systems, but opposite that has been observed for (nonsulfidic) Fe0 systems. The rates of TCE reduction were unaffected by ionic strength over the range of 0.1-10 mM NaCl, increased with Ca2+ or Mg2+ concentrations, and inhibited by the presence of humic acid. The inhibitory effect of humic acid on the reactivity of nFe/FeS was largely alleviated when humic acid was combined with Ca2+/Mg2+, presumably due to decreased adsorption of humic acid onto nFe/FeS surface by the formation of humic acid-Ca2+/Mg2+ complexes.

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Remediation of trichloroethylene by fes-coated iron nanoparticles in simulated and real groundwater: Effects of water chemistry

Abstract

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