DOI QR코드

DOI QR Code

Removal of Cs by Adsorption with IE911 (Crystalline Silicotitanate) from High-Radioactive Seawater Waste

IE911 (crystalline silicotitanate) 의한 고방사성해수폐액으로부터 Cs의 흡착 제거

  • Received : 2015.04.13
  • Accepted : 2015.06.18
  • Published : 2015.09.30

Abstract

This study was performed on the removal of Cs, one of the main high- radioactive nuclides contained in the high-radioactive seawater waste (HSW), by adsorption with IE911 (crystalline silicotitanate type). For the effective removal of Cs and the minimization of secondary solid waste generation, adsorption of Cs by IE911 (hereafter denoted as IE911-Cs) was effective to carry out in the m/V (ratio of absorbent weight to solution volume) ratio of 2.5 g/L, and the adsorption time of 1 hour. In these conditions, Cs and Sr were adsorbed about 99% and less than 5%, respectively. IE911-Cs could be also expressed as a Langmuir isotherm and a pseudo-second order rate equation. The adsorption rate constants (k2) were decreased with increasing initial Cs concentrations and particle sizes, and increased with increasing ratios of m/V, solution temperatures and agitation speeds. The activation energy of IE911-Cs was about 79.9 kJ/mol. It was suggested that IE911-Cs was dominated by a chemical adsorption having a strong bonding form. From the negative values of Gibbs free energy and enthalpy, it was indicated that the reaction of IE911-Cs was a forward, exothermic and relatively active at lower temperatures. Additionally, the negative entropy values were seen that the adsorbed Cs was evenly distributed on the IE911.

Keywords

Cesium;Adsorption;Removal;Crystalline silicotitanate;Kinetics;Activation energy;High-radioactive seawater waste

References

  1. S.C. Tsai, T.H. Wang, M.H. Li, Y.Y. Wei, and S.P. Teng, “Cesium adsorption and distribution onto crushed granite under different physico- chemical conditions”, J. Hazard Mater. 161, 854-861 (2009). https://doi.org/10.1016/j.jhazmat.2008.04.044
  2. N. Bektas, B. Akman, and S. Kara, “Kinetic and equilibrium studies in removing lead ions from aqueous solution by natural sepiolite”, J. Hazard Mater., B112, 115-122 (2004).
  3. A. Bouzidi, F. Souahi, and S. Hanini, “Sorption behavior of cesium on Ain Oussera soil under different physicochemical conditions”, J. Hazard Mater., 184, 640-646 (2010). https://doi.org/10.1016/j.jhazmat.2010.08.084
  4. K. Volchek, M.Y. Miah, W. Kuang, Z. Demaleki, and F. H. Tezel, “Adsorption of cesium on cement mortar from aqueous solutions”, J. Hazard Mater., 194, 331-337 (2011). https://doi.org/10.1016/j.jhazmat.2011.07.111
  5. T. Shahwan, D. Akar, and A.E. Eroglu, “Physicochemical characterization of the retardation of aqueous Cs+ ions by natural kaolinite and clinoptilolite minerals”, J. Colloid and Interface Sci. 285, 9-17 (2005). https://doi.org/10.1016/j.jcis.2004.11.016
  6. J.S. Hoskins, T. Karanfil, and S.M. Serkiz, “Removal and sequestration of iodide using silver impregnated active carbon”, Environ. Sci. Tech., 36, 784-789 (2002). https://doi.org/10.1021/es010972m
  7. K. Banerjee, G.L. Amy, M. Prevost, S. Nour, M. Jekel, P.M. Gallagher, and C.D. Blumenschein, “Kinetic and thermodynamic aspects of adsorption of arsenic onto granular ferric hydroxide”, Water Res. 42, 3371-3378 (2008). https://doi.org/10.1016/j.watres.2008.04.019
  8. T. Shahwan, H.N. Erten, and S. Unugur, “A characterization study of some aspects of the adsorption of aqueous Co++ ions on natural bentonite clay”, J. Colloid and Interface Sci. 300, 447-452 (2006). https://doi.org/10.1016/j.jcis.2006.04.069
  9. T. Shahwan and H.N. Erten, “Thermodyamic parameters of Cs+ sorption on natural clays”, J. Radioanal. Nucl. Chem., 253(1), 115-120 (2002). https://doi.org/10.1023/A:1015824819940
  10. F. Fu and Q. Wang, “Removal of heavy metal ions from wastewaters : A review”, J. Envior. Management, 92(3), 407-418 (2011). https://doi.org/10.1016/j.jenvman.2010.11.011
  11. M. Suss and G. Pfrepper, “Investigation of the sorption of cesium from acid solutions by various inorganic absorbents”, Radiochimica Acta, 29(1), 33-40 (1981).
  12. T.M. Nenoff and J.L. Krumhansl, “Cs+ removal from seawater by commercially available molecular sieves”, Sol. Extr. Ion Exch. 30, 33-40 (2012). https://doi.org/10.1080/07366299.2012.639224
  13. “UOP IONSIVTM Ion exchangers-Efficient treatment of liquid nuclear wastes” UOP, Honeywell company. (2012).
  14. D.V. Marinin and G.N. Brown, “Studies of sorbent/ion exchange materials for the removal of radioactive Sr from liquid radioactive waste and high hardness groundwaters”, Waste Manage., 20 545-553 (2000). https://doi.org/10.1016/S0956-053X(00)00017-9
  15. “Current status of Fukushima Daiichi nuclear power station”, Side event by government of Japan at 56th IAEA General Conference, September 17, 2012. http://www.nsr.go.jp/archive/nisa/english/files/P-3-1.pdf
  16. R. Harjula and J. Lehto, “Effect of sodium and potassium ions on cesium absorption from nuclear power plant waste solutions on synthetic zeolites”, Nucl. Chem. Waste Manage. 6, 133-137 (1986) https://doi.org/10.1016/0191-815X(86)90051-3
  17. D. M. Ruthven, Principles of adsorption and adsorption process, Wiley- Interscience Press, New York, (1984).
  18. T.H. Wang, M.H. Li, W.C. Yeh, Y.Y. Wei, and S.P. Teng, “Removal of cesium ions from aqueous solution by adsorption onto local Taiwan laterite”, J. Hazard Mater., 160, 638-642 (2008). https://doi.org/10.1016/j.jhazmat.2008.03.050
  19. “Supplementary materials related multi-nuclide removal equipments”, A specific nuclear facility assessment review meeting (The 2nd), Note 4, Tokyo Electric Power Company, January 24 (2013).
  20. "Nuclide analysis results of water at water treatment facility", March 26 2013. Tokyo Electric Power Company Web Site: http://www.tepco.co.jp/en/ nu/fukushima-np/images/handouts_120326_08-e.pdf.
  21. H. Rindo, “Current status and perspective of Fukushim aaccident remediation”, 10th Anniversary of Korean Radioactive Waste Society, Jeju, Korea, (Oct. 17, 2013).
  22. “Status of contaminated water treatment and tritium at Fukushima Daiichi nuclear power station”, April 22, 2014. Tokyo Electric Power Company Web Site: http://www.meti.go.jp/earthquake/nuclear/pdf/140424/140424_02_008.pdf.
  23. W. Faubel and S.A. Ali, “Separation of cesium from acid ILW-Purex solutions by sorption on inorganic ion exchangers”, Radochimica Acta, 40(1), 49-56 (1986).
  24. R.O.A. Rahman, H.A. Ibrahium, and Y.T. Hung, “Liquid radioactive wastes treatment : A Review”, Waters, 3, 551-565 (2011). https://doi.org/10.3390/w3020551
  25. E.D. Collins, D.O. Compbell, L.J. King, J.B. Knauer, and R.M. Wallace, "Evaluation of zeolite mixture for decontaminating high-activity level waster at the Three Mile Island Unit 2 nuclear power station", IAEA TC-518/4, (1984).
  26. B. Yu, J. Chen and C. Song, “Crystalline silicotitanate: a new type of ion exchanger for Cs removal from liquid waste”, J. Mater. Sci. Tech., 18(30), 206-210 (2002).
  27. IAEA Report, "Handing and Treatment of radioactive aqueous wastes", IAEA-TECDOC-654 (1992).
  28. Report of Japanese government to the IAEA Ministerial Conference on nuclear safety, “The accident at TEPCO’s Fukushima nuclear power stations”, June (2011).

Cited by

  1. Study of Composite Adsorbent Synthesis and Characterization for the Removal of Cs in the High-salt and High-radioactive Wastewater vol.15, pp.1, 2017, https://doi.org/10.7733/jnfcwt.2017.15.1.1
  2. Removal of heavy metals and pollutants by membrane adsorption techniques vol.8, pp.1, 2018, https://doi.org/10.1007/s13201-018-0661-6
  3. High-temperature Thermal Decomposition of Cs-adsorbed CHA-Cs and CHA-PCFC-Cs Zeolite System, and Sr-adsorbed 4A-Sr and BaA-Sr Zeolite System vol.16, pp.1, 2018, https://doi.org/10.7733/jnfcwt.2018.16.1.49

Acknowledgement

Grant : 해체특수폐기물처리기술 개발