Phytoremediation of a radiocesium-contaminated soil: Field evaluation of {sup 137}Cs bioaccumulation in the shoots of three plant species. Quarterly technical progress report, October 1, 1996--December 31, 1996

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A field study was conducted to investigate the potential of three plant species for phytoremediation of a {sup 137}Cs-contaminated site. From the contaminated soil, approximately 40-fold more radiocesium was removed in shoots of red root pigweed (Amaranthus retroflexus L.) compared with those of Indian mustard (Brassica juncea (L.) Czern) and tepary bean (Phaseolus acutifolius A. Gray). The greater potential for {sup 137}Cs removal from the soil by Amaranthus was associated with both high concentration of radiocesium in shoots and high shoot biomass production. Approximately 3% of the total {sup 137}Cs was removed from the top 15 cm of the soil ... continued below

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22 p.

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Lasat, M.M.; Ebbs, S.D.; Kochian, L.V.; Fuhrman, M. & Cornish, J. August 1, 1997.

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  • Lasat, M.M.
  • Ebbs, S.D.
  • Kochian, L.V. Cornell Univ., Ithaca, NY (United States). US Plant, Soil and Nutrition Lab.
  • Fuhrman, M. Brookhaven National Lab., Upton, NY (United States). Environmental and Waste Technology Center
  • Cornish, J. MSE Technology Applications, Inc., Butte, MT (United States)

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Description

A field study was conducted to investigate the potential of three plant species for phytoremediation of a {sup 137}Cs-contaminated site. From the contaminated soil, approximately 40-fold more radiocesium was removed in shoots of red root pigweed (Amaranthus retroflexus L.) compared with those of Indian mustard (Brassica juncea (L.) Czern) and tepary bean (Phaseolus acutifolius A. Gray). The greater potential for {sup 137}Cs removal from the soil by Amaranthus was associated with both high concentration of radiocesium in shoots and high shoot biomass production. Approximately 3% of the total {sup 137}Cs was removed from the top 15 cm of the soil in shoots of three-month-old Amaranthus plants. Soil leaching tests conducted with 0.1 and 0.5 M NH{sub 4}NO{sub 3} solutions eluted as much as 15 and 19%, respectively, of the soil {sup 137}Cs. Addition of NH{sub 4}NO{sub 3} to the soil, however, had no positive effect on {sup 137}Cs accumulation in shoots in any of the species investigated. It is proposed that either NH{sub 4}NO{sub 3} solution quickly percolated through the soil before interacting at specific {sup 137}Cs binding sites or radiocesium mobilized by NH{sub 4}NO{sub 3} application moved below the rhizosphere becoming unavailable for root uptake. Further research is required to enhance the phytotransfer of the NH{sub 4}NO{sub 3}-mobilized {sup 137}Cs. With two croppings of Amaranthus per year and a sustained rate of extraction, phytoremediation of this {sup 137}Cs-contaminated soil appears feasible in less than 15 years.

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22 p.

Notes

OSTI as DE97053484

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  • Other Information: PBD: [1997]

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  • Other: DE97053484
  • Report No.: DOE/PC/95701--T8
  • Grant Number: AI22-95PC95701
  • DOI: 10.2172/527484 | External Link
  • Office of Scientific & Technical Information Report Number: 527484
  • Archival Resource Key: ark:/67531/metadc698257

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  • August 1, 1997

Added to The UNT Digital Library

  • Aug. 14, 2015, 8:43 a.m.

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  • Nov. 10, 2015, 9:16 p.m.

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Lasat, M.M.; Ebbs, S.D.; Kochian, L.V.; Fuhrman, M. & Cornish, J. Phytoremediation of a radiocesium-contaminated soil: Field evaluation of {sup 137}Cs bioaccumulation in the shoots of three plant species. Quarterly technical progress report, October 1, 1996--December 31, 1996, report, August 1, 1997; United States. (digital.library.unt.edu/ark:/67531/metadc698257/: accessed December 11, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.