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Articles
  • OpenAccess
  • Natural Radioactivity in Miscanthus floridulu Plant from the Uranium Tailing Pile at Guangdong, South China  [RERP 2014]
  • DOI: 10.4236/jamp.2014.29095   PP.848 - 854
  • Author(s)
  • Gang Song, Qiuping Zhu, Minxing Lu, Diyun Chen, Yongheng Chen
  • ABSTRACT
  • Large amounts of uranium waste rocks and tailings resulting from the exploitation and treatment of uranium ore at the Northern Guangdong mine (South China) have been accumulated in dams (tailing ponds). To reduce the dispersion of natural radionuclides into the environment, some dams were revegetated with arbor, bush and sward. Besides these plants, Miscanthus floridulu is the dominant plant growing in some of the dams. The uptake and distribution of naturally occurring uranium (238U), thorium (232Th), radium (226Ra) and potassium (40K) by Miscanthus floridulu plant from different sample sites of uranium mine were studied under native conditions. The bioconcentration factors (BCFs) of soil to Miscanthus floridulu above-ground and root were calculated and observed to be in the range of 0.14 to 7.74 and 2.71 to 17.83 for 238U, 0 to 3.02 and 0 to 3.29 for 232Th, 0.15 to 79.76 and 1.01 to 50.22 for 226Ra and 3.00 to 8.41 and 2.69 to 11.22 for 40K, respectively. The transfer factors (TFs) of Miscanthus floridulu root to aboveground were also calculated and observed to be in the range of 0.01 to 0.73 for 238U, 0 to 0.99 for 232Th, 0.08 to 1.50 for 226Ra and 0.57 to 1.94 for 40K, respectively. The results showed that, Miscanthus floridulu is 238U and 226Ra-accumulating plant with significant absorption and accumulation characteristics.

  • KEYWORDS
  • Natural Radionuclides, Uranium Tailings, Miscanthus floridulu, BCFs and TFs
  • References
  • [1]
    Pulhani, V.A., Dafauti, S., Hegde, A.G., Sharma, R.M. and Mishra, U.C. (2005) Uptake and Distribution of Natural Radioactivity in Wheat Plants from Soil. Journal of Environmental Radioactivity, 79, 331-346.
    http://dx.doi.org/10.1016/j.jenvrad.2004.08.007
    [2]
    Vinogradov, A.P. (1959) The Geochemistry of Rare and Dispersed Chemical Elements in Soils. 2nd Edition, Consultants Bureau, New York.
    [3]
    Chen, Y. and Cutright, T. (2001) EDTA and HEDTA Effects on Cd, Cr, and Ni Uptake by Helianthus annuus. Chemosphere, 45, 21-28.
    http://dx.doi.org/10.1016/S0045-6535(01)00031-5
    [4]
    Meers, E., Ruttens, A., Hopgood, M.J., Samson, D. and Tack, F.M.G. (2005) Comparison of EDTA and EDDS as Potential Soil Amendments for Enhanced Phytoextraction of Heavy Metals. Chemosphere, 58, 1011-1022.
    http://dx.doi.org/10.1016/j.chemosphere.2004.09.047
    [5]
    Blanco Rodríguez, P., Vera Tomé, F., Pérez Fernaández, M. and Lozano, J.C. (2006) Linearity Assumption in Soil-to- Plant Transfer Factors of Natural Uranium and Radium in Helianthus annuus L. Science of the Total Environment, 361, 1-7.
    http://dx.doi.org/10.1016/j.scitotenv.2005.08.020
    [6]
    Prasad, M.N.V. and Freitas, H.M.O. (2003) Metal Hyperaccu-mulation in Plants Biodiversity Prospecting for Phytore-mediation Technology. Electronic Journal of Biotechnology, 6, 285-321.
    http://dx.doi.org/10.2225/vol6-issue3-fulltext-6
    [7]
    Huang, J.W., Blaylock, M.J., Kapulnik, Y. and Ensley, B.D. (1998) Phytoremediation of Uranium-Contaminated Soils: Role of Organic Acids in Triggering Uranium Hyperaccumulation in Plants. Environmental Science Technology, 32, 2004-2008.
    http://dx.doi.org/10.1021/es971027u
    [8]
    Song, G., Chen, D.Y., Zhang, Z.Q. and Xie, W.B. (2012) Natural Radioactivity Levels in Topsoil from the Pearl River Delta Zone, Guangdong, China. Journal of Environmental Radioactivity, 103, 48-53.
    http://dx.doi.org/10.1016/j.jenvrad.2011.06.014
    [9]
    Yunoki, E., Katoaka, T., Michiro, K., Sugiyama, H., Shimizu, M. and Mori, T. (1993) Activity Concentrations of 238U and 226Ra in Agricultural Samples. Journal of Radio Analytical Nuclear Chemistry Articles, 174, 223-228.
    http://dx.doi.org/10.1007/BF02037909

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