Measurement of Strontium-90 in Radioactive Liquid Waste

Document Type : Original Article

Authors

1 Nuclear Fuel Research School, Nuclear Science and Technology Research Institute, AEOI, P.O. Box 11365-3486, Tehran, Iran

2 Faculty of Chemical Engineering, School of Engineering, University of Tehran, Tehran, Iran

10.22052/rsm.2026.257046.1135

Abstract

The measurement of Sr-90 is important because of its half-life and environmental hazards, so research is very important in this regard. The purpose of this research is to review the measurement and determination techniques of Sr-90 radiation to the standard ISO-18589. Efforts are made to safely dispose of waste by following guidelines for determining the amount of radiation, ensuring that the environmental and health hazards of waste products do not exceed acceptable levels.
First, for characterization, the radioactive waste sample was analyzed using inductive plasma coupled spectroscopy, liquid scintillation, and gamma spectroscopy, and the concentrations and activities of the elements in the matrix were determined. In the following, parameters such as time, nitric acid concentration, and strontium concentration were evaluated, and the distribution coefficient of strontium was calculated by batch method. on the other hand, adsorption isotherms were also checked.
In the continuous method based on the ISO standard, first, the column containing Resin Sr was prepared. The sample was then loaded on the column. Strontium was selectively adsorbed in the column in an acidic medium and then washed with a elution and separated from other impurities such as barium and calcium. In order to measure the amount of radioactivity, the sample containing strontium-90 was measured with a liquid scintillation device after separation and removal of impurities. In order to determine the chemical yield, stable strontium was added to it with a specific concentration as a carrier. Based on this, the chemical efficiency was reported as 98.8%.

Keywords

References

  1. S. Abbadi, H. Diercks, A. Knöchel, R. S. Gupta, K. Tödter. Rapid procedures for the determination of radioactive strontium isotopes in food and environmental samples/Schnellverfahren zur Bestimmung von radioaktiven Strontiumisotopen in Lebensmitteln und Umweltproben. Kerntechnik 62 (1997) 91-95.
  2. A. Sajeniouk. Routine radiochemical method for the determination of 90 Sr, 238 Pu, 239+ 240 Pu, 241 Am and 244 Cm in environmental samples. J. Radioanal. Nucl. Chem. 264 (2005) 337-342.
  3. V. Ageev, V. Satsuk, A. Sajeniouk, A. Odintsov. Radiochemical method of simultaneous determination of 90Sr, 238Pu, 239+ 240Pu, 241Am and 244Cm in the environmental samples. In 14th Radiochemical Conference. Booklet of Abstracts (2002) 43-43.
  4. 4. Altzitzoglou. Radioactivity determination of individual radionuclides in a mixture by liquid scintillation spectra deconvolution. Appl. Radiat. Isot. 66 (2008) 1055-1061.
  5. F. Asgharizadeh, B. Salimi, M. G. Maragheh, M. K. Mahani, M. Aliabadi. Determination of 90Sr concentration in soil and sediment samples from southern shores of Iran using a Sr Resin and LSC method. LSC (2008) 299-303.
  6. I. Chmielewska, S. Chalupnik, E. Bokori. Application of calcium carrier to avoid losses of 90Sr during the chemical preparation of liquid samples for Liquid Scintillation Spectrometry. in LSC 2008: Adv. Liq. Scintill. Spectrom. J. Eikenberg, M. Jäggi, H. Beer, H. Baehrle (Eds.), Tucson, AZ, USA: The Arizona Board of Regents on behalf of the University of Arizona (2009) 53–57.
  7. P. Gaca, E. Tomankiewicz, J. W. Mietelski, B. Kubica, S. Błażej, M. Stobiński, M. Tuteja-Krysa, S. Skiba. 90Sr, 137Cs and Pu isotopes in moss and bilberry leaf from the Tatra mountains. in LSC 2005: Adv. Liq. Scintill. Spectrom. Tucson, AZ, USA: The Arizona Board of Regents on behalf of the University of Arizona (2005) 305–310.
  8. E. Minne, F. Heynen, C. Delporte, S. Hallez. Effect on 90Sr determination resulting from a possible over-estimation of the external standard quench parameter on Quantulus 1220. In J. Eikenberg, M. Jäggi, H. Beer, & H. Baehrle (Eds.), LSC 2008: Adv. Liq. Scintill. Spectrom. Tucson, AZ, USA: The Arizona Board of Regents on behalf of the University of Arizona (2009) 183-192.
  9. T. Ohno, M. Hirono, S. Kakuta, S. Sakata. Determination of strontium 90 in environmental samples by triple quadrupole ICP-MS and its application to Fukushima soil samples. J. Anal. At. Spectrom 33 (2018) 1081-1085.
  10. R.-D. Wilken, R. Oiehl. Strontium-90 in environmental samples from northern Germany before and after the Chernobyl accident. Radiochim. Acta 41 (1987) 157-162.
  11. J. Zhong, M. Dujovny, H. K. Park, E. Perez, A. R. Perlin, F. G. Diaz. Advances in ICP monitoring techniques. Neurol. Res. Int. 25 (2003) 339-350.
  12. G. Tyler, J. Yvon. ICP-OES, ICP-MS and AAS Techniques Compared. ICP Opt. Emiss. Spectrosc. Tech. Note 5 (1995) 1-11.
  13. M. A. Al-Ghouti, D. A. Da'ana. Guidelines for the use and interpretation of adsorption isotherm models: A review. J. Hazard. Mater. 393 (2020) 122383.
  14. M. Musah, Y. Azeh, J. Mathew, M. Umar, Z. Abdulhamid, A. Muhammad. Adsorption kinetics and isotherm models: a review. CaJoST 4 (2022) 20-26.
  15. C. Hinz. Description of sorption data with isotherm equations. Geoderma 99 (2001) 225-243.
  16. E. Heraldy, Y. Hidayat, M. Firdaus. The langmuir isotherm adsorption equation: the monolayer approach. IOP Conf. Ser. Mater. Sci. Eng. 107 (1) (2016) 012067.
  17. S. Azizian, S. Eris, L. D. Wilson. Re-evaluation of the century-old Langmuir isotherm for modeling adsorption phenomena in solution. Chem. Phys. 513 (2018) 99-104.
  18. M. Vigdorowitsch, A. Pchelintsev, L. Tsygankova, E. Tanygina. Freundlich isotherm: An adsorption model complete framework. Appl. Sci. 11 (17) (2021) 8078.
  19. A. Proctor, J. Toro-Vazquez, The Freundlich isotherm in studying adsorption in oil processing. J. Am. Oil Chem. Soc. 73 (1996) 1627-1633.

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