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The effects of various amendments on the biostimulation of perchlorate reduction in laboratory microcosm and flowthrough soil columns

Publication ,  Journal Article
Wang, Y; Jin, L; Deshusses, MA; Matsumoto, MR
Published in: Chemical Engineering Journal
October 1, 2013

Perchlorate (ClO4-) is a contaminant of concern in groundwater and drinking water. In the presence of a suitable electron donor, perchlorate can be reduced to non-toxic chloride via either biotic or abiotic mechanisms. The objective of this study was to evaluate a variety of amendments (Emulsified Oil Substrate (EOS®598), EHC® and a compost/mulch mixture) and supplemental nutrients to stimulate in situ perchlorate bioremediation. Both laboratory microcosm and column experiments were conducted with groundwater from a contaminated site that had an initial perchlorate concentration of about 500μg/L. Complete perchlorate removal was observed within 5-12days in all the microcosms. The addition of 1g/L (NH4)2HPO4 as nutrient increased the reduction rate of perchlorate in EOS and compost/mulch microcosms, but had no effect in the EHC amended microcosms. Two different flowthrough experiments were conducted. Phase 1 used two parallel columns packed with EOS-amended compost/mulch/gravel media and EHC-amended compost/mulch/gravel media, while in Phase 2, a series of varying length columns ranging from 0.15m to 0.60m were packed with EOS-amended soil and EHC-amended soil. No perchlorate was detected in the effluent of both EOS- and EHC-amended compost/mulch/gravel columns after 20days. In Phase 2, no significant treatment difference was observed between the EOS- and EHC-amended soil columns. Complete perchlorate removal was observed after 6 to 11days in all different length columns when they were operated at a hydraulic loading rate of 0.15m3/m2-d. Perchlorate removal was completely lost in all the columns when the hydraulic loading rate was increased to 0.60m3/m2-d. Nitrate competed with perchlorate for electrons, and was a preferred acceptor over perchlorate. Overall, based on the results of this study, the two commercial amendments can be considered as effective means for perchlorate bioremediation, although EHC had a shorter period of effectiveness. © 2013 Elsevier B.V..

Duke Scholars

Published In

Chemical Engineering Journal

DOI

ISSN

1385-8947

Publication Date

October 1, 2013

Volume

232

Start / End Page

388 / 396

Related Subject Headings

  • Chemical Engineering
  • 4016 Materials engineering
  • 4011 Environmental engineering
  • 4004 Chemical engineering
  • 0907 Environmental Engineering
  • 0905 Civil Engineering
  • 0904 Chemical Engineering
 

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Wang, Y., Jin, L., Deshusses, M. A., & Matsumoto, M. R. (2013). The effects of various amendments on the biostimulation of perchlorate reduction in laboratory microcosm and flowthrough soil columns. Chemical Engineering Journal, 232, 388–396. https://doi.org/10.1016/j.cej.2013.07.060
Wang, Y., L. Jin, M. A. Deshusses, and M. R. Matsumoto. “The effects of various amendments on the biostimulation of perchlorate reduction in laboratory microcosm and flowthrough soil columns.” Chemical Engineering Journal 232 (October 1, 2013): 388–96. https://doi.org/10.1016/j.cej.2013.07.060.
Wang Y, Jin L, Deshusses MA, Matsumoto MR. The effects of various amendments on the biostimulation of perchlorate reduction in laboratory microcosm and flowthrough soil columns. Chemical Engineering Journal. 2013 Oct 1;232:388–96.
Wang, Y., et al. “The effects of various amendments on the biostimulation of perchlorate reduction in laboratory microcosm and flowthrough soil columns.” Chemical Engineering Journal, vol. 232, Oct. 2013, pp. 388–96. Scopus, doi:10.1016/j.cej.2013.07.060.
Wang Y, Jin L, Deshusses MA, Matsumoto MR. The effects of various amendments on the biostimulation of perchlorate reduction in laboratory microcosm and flowthrough soil columns. Chemical Engineering Journal. 2013 Oct 1;232:388–396.
Journal cover image

Published In

Chemical Engineering Journal

DOI

ISSN

1385-8947

Publication Date

October 1, 2013

Volume

232

Start / End Page

388 / 396

Related Subject Headings

  • Chemical Engineering
  • 4016 Materials engineering
  • 4011 Environmental engineering
  • 4004 Chemical engineering
  • 0907 Environmental Engineering
  • 0905 Civil Engineering
  • 0904 Chemical Engineering