Application of Sequential Extractions and X-ray Absorption Spectroscopy to Determine the Speciation of Chromium in Northern New Jersey Marsh Soils Developed in Chromite ore Processing Residue (COPR)

Elzinga, E; Cirmo, A

doi:10.1016/j.jhazmat.2010.06.130

Title: Application of Sequential Extractions and X-ray Absorption Spectroscopy to Determine the Speciation of Chromium in Northern New Jersey Marsh Soils Developed in Chromite ore Processing Residue (COPR)

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Abstract

The Cr speciation in marsh soils developed in weathering chromite ore processing residue (COPR) was characterized using sequential extractions and synchrotron microbeam and bulk X-ray absorption spectroscopic (XAS) analyses. The sequential extractions suggested substantial Cr associated with reducible and oxidizable soil components, and significant non-extractable residual Cr. Notable differences in Cr speciation estimates from three extraction schemes underscore the operationally defined nature of Cr speciation provided by these methods. Micro X-ray fluorescence maps and {mu}-XAS data indicated the presence of {micro}m-sized chromite particles scattered throughout the weathered COPR matrix. These particles derive from the original COPR material, and have relatively high resistance towards weathering, and therefore persist even after prolonged leaching. Bulk XAS data further indicated Cr(III) incorporated in Fe(OH){sub 3}, and Cr(III) associated with organic matter. The low Cr contents of the weathered material (200-850 ppm) compared to unweathered COPR (20,000-60,000 ppm) point to substantial Cr leaching during COPR weathering, with partial repartitioning of released Cr into secondary Fe(OH){sub 3} phases and organics. The effects of anoxia on Cr speciation, and the potential of active COPR weathering releasing Cr(VI) deeper in the profile require further study.

Authors:: Elzinga, E; Cirmo, A

Publication Date:: Fri Jan 01 00:00:00 EST 2010

Research Org.:: Brookhaven National Lab. (BNL), Upton, NY (United States). National Synchrotron Light Source

Sponsoring Org.:: DOE - OFFICE OF SCIENCE

OSTI Identifier:: 1019797

Report Number(s):: BNL-95643-2011-JA
Journal ID: ISSN 0304-3894; JHMAD9; TRN: US201115%%433

DOE Contract Number:: DE-AC02-98CH10886

Resource Type:: Journal Article

Journal Name:: Journal of Hazardous Materials

Additional Journal Information:: Journal Volume: 183; Journal Issue: 1-3; Journal ID: ISSN 0304-3894

Country of Publication:: United States

Language:: English

Subject:: 32 ENERGY CONSERVATION, CONSUMPTION, AND UTILIZATION; ABSORPTION; ABSORPTION SPECTROSCOPY; ANOXIA; CHROMITES; CHROMIUM; FLUORESCENCE; LEACHING; NEW JERSEY; ORE PROCESSING; ORGANIC MATTER; RESIDUES; SOILS; SYNCHROTRONS; WEATHERING; national synchrotron light source

Citation Formats


                    Elzinga, E, and Cirmo, A. Application of Sequential Extractions and X-ray Absorption Spectroscopy to Determine the Speciation of Chromium in Northern New Jersey Marsh Soils Developed in Chromite ore Processing Residue (COPR).  United States: N. p., 2010. 
        Web.  doi:10.1016/j.jhazmat.2010.06.130.

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                    Elzinga, E, & Cirmo, A. Application of Sequential Extractions and X-ray Absorption Spectroscopy to Determine the Speciation of Chromium in Northern New Jersey Marsh Soils Developed in Chromite ore Processing Residue (COPR).  United States.  https://doi.org/10.1016/j.jhazmat.2010.06.130

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                    Elzinga, E, and Cirmo, A. 2010.  
        "Application of Sequential Extractions and X-ray Absorption Spectroscopy to Determine the Speciation of Chromium in Northern New Jersey Marsh Soils Developed in Chromite ore Processing Residue (COPR)".  United States.  https://doi.org/10.1016/j.jhazmat.2010.06.130.

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@article{osti_1019797,

  title        = {Application of Sequential Extractions and X-ray Absorption Spectroscopy to Determine the Speciation of Chromium in Northern New Jersey Marsh Soils Developed in Chromite ore Processing Residue (COPR)},

  author       = {Elzinga, E and Cirmo, A},

  abstractNote = {The Cr speciation in marsh soils developed in weathering chromite ore processing residue (COPR) was characterized using sequential extractions and synchrotron microbeam and bulk X-ray absorption spectroscopic (XAS) analyses. The sequential extractions suggested substantial Cr associated with reducible and oxidizable soil components, and significant non-extractable residual Cr. Notable differences in Cr speciation estimates from three extraction schemes underscore the operationally defined nature of Cr speciation provided by these methods. Micro X-ray fluorescence maps and {mu}-XAS data indicated the presence of {micro}m-sized chromite particles scattered throughout the weathered COPR matrix. These particles derive from the original COPR material, and have relatively high resistance towards weathering, and therefore persist even after prolonged leaching. Bulk XAS data further indicated Cr(III) incorporated in Fe(OH){sub 3}, and Cr(III) associated with organic matter. The low Cr contents of the weathered material (200-850 ppm) compared to unweathered COPR (20,000-60,000 ppm) point to substantial Cr leaching during COPR weathering, with partial repartitioning of released Cr into secondary Fe(OH){sub 3} phases and organics. The effects of anoxia on Cr speciation, and the potential of active COPR weathering releasing Cr(VI) deeper in the profile require further study.},

  doi          = {10.1016/j.jhazmat.2010.06.130},

  url          = {https://www.osti.gov/biblio/1019797},
  journal      = {Journal of Hazardous Materials},

  issn         = {0304-3894},

  number       = 1-3,

  volume       = 183,

  place        = {United States},

  year         = {Fri Jan 01 00:00:00 EST 2010},

  month        = {Fri Jan 01 00:00:00 EST 2010}

}

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