Environmental Engineering Research

Korean Society of Environmental Engineers (대한환경공학회)
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Modeling the sensitivity of hydrogeological parameters associated with leaching of uranium transport in an unsaturated porous medium

  • Received : 2017.08.29
  • Accepted : 2018.05.03
  • Published : 2018.12.31
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Abstract

The uranium ore residues from the legacies of past uranium mining and milling activities that resulted from the less stringent environmental standards along with the uranium residues from the existing nuclear power plants continue to be a cause of concern as the final uranium residues are not made safe from radiological and general safety point of view. The deposition of uranium in ponds increases the risk of groundwater getting contaminated as these residues essentially leach through the upper unsaturated geological formation. In this context, a numerical model has been developed in order to forecast the $^{238}U$ and its progenies concentration in an unsaturated soil. The developed numerical model is implemented in a hypothetical uranium tailing pond consisting of sandy soil and silty soil types. The numerical results show that the $^{238}U$ and its progenies are migrating up to the depth of 90 m and 800 m after 10 y in silty and sandy soil, respectively. Essentially, silt may reduce the risk of contamination in the groundwater for longer time span and at the deeper depths. In general, a coupled effect of sorption and hydro-geological parameters (soil type, moisture context and hydraulic conductivity) decides the resultant uranium transport in subsurface environment.

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References

  1. Robinson P. Uranium mill tailings remediation performed by the US DOE: An overview. US DOE; 2004.
  2. Elango L, Brindha K, Kalpana L, Sunny F, Nair RN, Murugan R. Groundwater flow and radionuclide decay-chain transport modeling around a proposed uranium tailings pond in India. Hydrogeol. J. 2012;20:797-812. https://doi.org/10.1007/s10040-012-0834-6
  3. Haile SS. VS2DRT: Variably saturated two dimensional reactive transport modelling in the vadose zone. Freiberg, Germany: TU Bergakademie Freiberg; 2013.
  4. IAEA. The long term stabilization of uranium mill tailings. International Atomic Energy Agency, Austria; 2004.
  5. Bossew P, Kirchner G. Modelling the vertical distribution of radionuclides in soil. Part 1: The convection-dispersion equation revisited. J. Environ. Radioact. 2004;73:127-150. https://doi.org/10.1016/j.jenvrad.2003.08.006
  6. Saleh TA. Mercury sorption by silica/carbon nanotubes and silica/activated carbon: A comparison study. J. Water Supply Res. Technol. AQUP 2015:64:892-903. https://doi.org/10.2166/aqua.2015.050
  7. Gupta VK, Ali I, Saleh TA, Nayak A, Agarwal S. Chemical treatment technologies for waste-water recycling - An overview. RSC Adv. 2012:2:6380-6388. https://doi.org/10.1039/c2ra20340e
  8. Saleh TA, Agarwal S, Gupta VK. Synthesis of MWCNT/$MnO_2$ and their application for simultaneous oxidation of arsenite and sorption of arsenate. Appl. Catal. B-Environ. 2011:106:46-53.
  9. Saleh TA. Nanocomposite of carbon nanotubes/silica nanoparticles and their use for adsorption of Pb(II): From surface properties to sorption mechanism. Desalin. Water Treat. 2016:57:10730-10744. https://doi.org/10.1080/19443994.2015.1036784
  10. Gupta VK, Ali I, Saleh TA, Siddiqui MN, Agarwal S. Chromium removal from water by activated carbon developed from waste rubber tires. Environ. Sci. Pollut. Res. 2013:20:1261-1268. https://doi.org/10.1007/s11356-012-0950-9
  11. Saleh TA. Isotherm, kinetic, and thermodynamic studies on Hg(II) adsorption from aqueous solution by silica- multiwall carbon nanotubes. Environ. Sci. Pollut. Res. 2015:22:16721-16731. https://doi.org/10.1007/s11356-015-4866-z
  12. Zare F, Ghaedi M, Daneshfar A, et al. Efficient removal of radioactive uranium from solvent phase using AgOH-MWCNTs nanoparticles: Kinetic and thermodynamic study. Chem. Eng. J. 2015:273:296-306. https://doi.org/10.1016/j.cej.2015.03.002
  13. Saleh TA, Naeemullah, Tuzen M, Sari A. Polyethylenimine modified activated carbon as novel magnetic adsorbent for the removal of uranium from aqueous solution. Chem. Eng. Res. Design 2017:117:218-227. https://doi.org/10.1016/j.cherd.2016.10.030
  14. Camus H, Little R, Acton D, et al. Long-term contaminant migration and impacts from uranium mill tailings. J. Environ. Radioact. 1998;42:289-304.
  15. Kalf F, Dudgeon C. Analysis of long-term groundwater dispersal of contaminants from proposed Jabiluka Mine Tailings repositories. Supervising Scientist Report 143, Supervising Scientist, Canberra, Australia; 1999.
  16. Zhu C, Hu FQ, Burden DS. Multi-component reactive transport modelling of natural attenuation of an acid ground-water plume at a uranium mill tailings site. J. Contamin. Hydrol. 2001;52:85-108. https://doi.org/10.1016/S0169-7722(01)00154-1
  17. Neves O, Matias MJ. Assessment of groundwater quality and contamination problems ascribed to an abandoned uranium mine (Cunha Baixa region, central Portugal). Environ. Geol. 2008;53:1799-1810. https://doi.org/10.1007/s00254-007-0785-8
  18. Leijnse A, van de Weerd H, Hassanizadeh SM. Modelling uranium transport in Koongarra, Australia: The effect of a moving weathering zone. Math. Geol. 2001;33:1:1-29. https://doi.org/10.1023/A:1007554008927
  19. Tricca A, Porcelli D, Wasserburg GL. Factors controlling the groundwater transport of U, Th, Ra and Rn. J. Earth Syst. Sci. 2000;109:95-108. https://doi.org/10.1007/BF02719153
  20. Nitzsche O, Merkel B. Reactive transport modeling of uranium 238 and radium 226 in groundwater of the Konigstein uranium mine, Germany. Hydrogeol. J. 1999;7:423-430. https://doi.org/10.1007/s100400050215
  21. Rotter BE, Barry DA, Gerhard JI, Small JS. Modeling U(VI) biomineralization in single- and dual-porosity porous media. Water Resour. Res. 2008;44:W08437.
  22. Nair RN, Sunny F, Manikandan ST. Modelling of decay chain transport in groundwater from uranium tailings ponds. Appl. Math. Model. 2010;34:2300-2311. https://doi.org/10.1016/j.apm.2009.10.038
  23. Qian T, Li S, Ding Q, Wu G, Zhao D. Two-dimensional numerical modeling of $^{90}Sr$ transport in unsaturated Chinese loess under artificial sprinkling. J. Environ. Radioact. 2009:100:422-428. https://doi.org/10.1016/j.jenvrad.2009.02.004
  24. Merk R. Numerical modeling of the radionuclide water pathway with HYDRUS and comparison with the IAEA model of SR 44. J. Environ. Radioact. 2012;105:60-69. https://doi.org/10.1016/j.jenvrad.2011.10.014
  25. Sanchez DP, Thorne MC. Modelling the behaviour of uranium-series radionuclides in soils and plants taking into account seasonal variations in soil hydrology. J. Environ. Radioact. 2014;131:19-30. https://doi.org/10.1016/j.jenvrad.2013.09.008
  26. Nair RN, Chopra M, Sunny F, Sharma LK, Puranik VD. Source term evaluation model for uranium tailings ponds. J. Hazard. Toxic. Radioact. Waste. 2013;17:211-217. https://doi.org/10.1061/(ASCE)HZ.2153-5515.0000174
  27. Pabich WJ, Valiela I, Hemond HE. Relationship between DOC concentration and vadose zone thickness and depth below water table in groundwater of Cape Cod, U.S.A. Biochemistry 2001;55:247-268.
  28. Holden A, Fierer N. Microbial processes in the vadose zone. Vadose Zone J. 2005;4:1-21. https://doi.org/10.2136/vzj2005.0001
  29. Kartha SA, Srivastava R. Effect of immobile water content on contaminant transport in unsaturated zone. J. Hydro-environ. Res. 2008;1:206-215. https://doi.org/10.1016/j.jher.2007.12.002
  30. Berlin M, Suresh Kumar G, Nambi IM. Numerical modeling on fate and transport of nitrate in an unsaturated system under non-isothermal condition. Eur. J. Environ. Civil Eng. 2013;17:350-373. https://doi.org/10.1080/19648189.2013.788984
  31. Berlin M, Suresh Kumar G, Nambi IM. Numerical modeling of biological clogging on transport of nitrate in an unsaturated porous media. Environ. Earth Sci. 2015;73:3285-3298. https://doi.org/10.1007/s12665-014-3612-z
  32. Wang XS, Ma MG, Li X, Zhao J, Dong P, Zhou J. Groundwater response to leakage of surface water through a thick vadose zone in the middle reaches area of Heihe River Basin, in China. Hydrol. Earth Syst. Sci. 2010;14:639-650. https://doi.org/10.5194/hess-14-639-2010
  33. Ye M, Pan F, Wu YS, Hu BX, Shirley C, Yu Z. Assessment of radionuclide transport uncertainty in the unsaturated zone of Yucca Mountain. Adv. Water Resour. 2007;30:118-134. https://doi.org/10.1016/j.advwatres.2006.03.005
  34. Kim GN, Moon JK, Lee KW. An analysis of the effect of hydraulic parameters on radionuclide migration in an unsaturated zone. Nucl. Eng. Technol. 2010;42:562-567. https://doi.org/10.5516/NET.2010.42.5.562
  35. Winograd IJ. Radioactive waste disposal in thick unsaturated zones. Sci. 1981;212:1457-1460. https://doi.org/10.1126/science.212.4502.1457
  36. Suchomel KH, Kreamer DK, Long A. Production and transport of carbon dioxide in a contaminated vadose zone: A stable and radioactive carbon isotope study. Environ. Sci. Technol. 1990;24:1824-1831. https://doi.org/10.1021/es00082a006
  37. Viswanathan HS, Robinsor BA, Gable CW, Carey JW. A geostatistical modeling study of the effect of heterogeneity on radionuclide transport in the unsaturated zone, Yucca Mountain. J. Contam. Hydrol. 2003;62-63:319-336. https://doi.org/10.1016/S0169-7722(02)00162-6
  38. Antonopoulos VZ. Water movement and heat transfer simulations in a soil under ryegrass. Biosyst. Eng. 2006;95:127-138. https://doi.org/10.1016/j.biosystemseng.2006.05.008
  39. Berlin M, Suresh Kumar G, Nambi IM. Numerical modeling on transport of nitrogen from wastewater and fertilizer applied on paddy fields. Ecol. Model. 2014a;278:85-99. https://doi.org/10.1016/j.ecolmodel.2014.02.008
  40. Berlin M, Suresh Kumar G, Nambi IM. Numerical modeling on the effect of dissolved oxygen on nitrogen transformation and transport in unsaturated porous system. Environ. Model. Assess. 2014b;19:283-299. https://doi.org/10.1007/s10666-014-9399-1
  41. Van Genuchten M.Th. A closed-form equation for predicting hydraulic conductivity of unsaturated soils. Soil Sci. J. 1980;44:892-898. https://doi.org/10.2136/sssaj1980.03615995004400050002x
  42. Van Dam JC, Feddes RA. Numerical simulation of infiltration, evaporation and shallow groundwater levels with the Richards equation. J. Hydrol. 2000;233:72-85. https://doi.org/10.1016/S0022-1694(00)00227-4
  43. Bauer P, Attinger S, Kinzelbach W. Transport of a decay chain in homogeneous porous media: Analytical solution. J. Contam. Hydrol. 2001;49:217-239. https://doi.org/10.1016/S0169-7722(00)00195-9
  44. Mitchell RJ, Mayer AS. A numerical model for transient-hysteretic flow and solution transport in unsaturated porous media. J. Contam. Hydrol. 1998;50:243-264.
  45. Lee MS, Lee KK, Hyun Y, Clement TP, Hamilton D. Nitrogen transformation and transport modeling in groundwater aquifers. Ecol. Model. 2006;192:143-159. https://doi.org/10.1016/j.ecolmodel.2005.07.013
  46. Carsel RF, Parrish RS. Developing joint probability distributions of soil water retention characteristics. Water Resour. Res. 1998;24:755-769.