Kinetics of chromium(VI) reduction by ferrous iron

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Description

Chromium is a primary inorganic contaminant of concern at the Pantex Plant. Chromium concentrations have been found to be two orders of magnitude higher than the drinking water standards, particularly in certain wells in the perched aquifer below Zone 12. In situ reduction of a mobile form of chromium, Cr(VI) to an immobile form, Cr(III), was examined as a viable option to active soil restoration. Successfully immobilizing chromium in the vadose zone as Cr(III) will reduce the amount of chromium that reaches the groundwater table. The results from the solution experiments indicated that chromium was rapidly and stoichiometrically reduced by ... continued below

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27 p.

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Batchelor, B.; Schlautman, M.; Hwang, I. & Wang, R. September 1, 1998.

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Description

Chromium is a primary inorganic contaminant of concern at the Pantex Plant. Chromium concentrations have been found to be two orders of magnitude higher than the drinking water standards, particularly in certain wells in the perched aquifer below Zone 12. In situ reduction of a mobile form of chromium, Cr(VI) to an immobile form, Cr(III), was examined as a viable option to active soil restoration. Successfully immobilizing chromium in the vadose zone as Cr(III) will reduce the amount of chromium that reaches the groundwater table. The results from the solution experiments indicated that chromium was rapidly and stoichiometrically reduced by Fe(II) in solution. Also, the slurry experiments showed that the aquifer solids removed Fe(II) from solution, but a portion of the iron removed remained available for reaction with Cr(VI), but at a slower rate. A model to predict different amounts of iron pseudo-components was developed, which allowed prediction of iron amounts required to reduce chromium under in situ conditions.

Physical Description

27 p.

Notes

INIS; OSTI as DE99000893

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  • Other Information: PBD: Sep 1998

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  • Other: DE99000893
  • Report No.: ANRCP--1998-13
  • Grant Number: FC04-95AL85832
  • DOI: 10.2172/290853 | External Link
  • Office of Scientific & Technical Information Report Number: 290853
  • Archival Resource Key: ark:/67531/metadc686930

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Office of Scientific & Technical Information Technical Reports

Reports, articles and other documents harvested from the Office of Scientific and Technical Information.

Office of Scientific and Technical Information (OSTI) is the Department of Energy (DOE) office that collects, preserves, and disseminates DOE-sponsored research and development (R&D) results that are the outcomes of R&D projects or other funded activities at DOE labs and facilities nationwide and grantees at universities and other institutions.

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Creation Date

  • September 1, 1998

Added to The UNT Digital Library

  • July 25, 2015, 2:20 a.m.

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  • Jan. 22, 2018, 12:25 p.m.

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Batchelor, B.; Schlautman, M.; Hwang, I. & Wang, R. Kinetics of chromium(VI) reduction by ferrous iron, report, September 1, 1998; [Amarillo,] Texas. (digital.library.unt.edu/ark:/67531/metadc686930/: accessed June 19, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.