Remediation of Trichloroethylene by FeS-Coated Iron Nanoparticles in Simulated and Real Groundwater: Effects of Water Chemistry.

Ind. Eng. Chem. Res., 2013, 52 (27), pp 9343–9350.

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

School of Environmental Science and Engineering,Pohang University of Science and Technology (POSTECH), Pohang, 790-784, Republic of Korea and

Department of Environmental and Biomolecular Systems, Oregon Health & Science University, Beaverton, Oregon 97006, United States.

 

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.

 

Copyright © 2013 American Chemical Society.

Go To Journal

 

Check Also

Computational Insights into High-Pressure Equilibria of Supercritical Gases in Ammonia - Advances in Engineering

Computational Insights into High-Pressure Equilibria of Supercritical Gases in Ammonia