A new approach to extracting cobalt(II) from non-borate and borate solutions of liquid radioactive wastes containing ligands of ethylenediaminetetraacetate and oxalic acid is proposed. The approach is based on the difference in the stability of complexes of organic ions with metals. Substituting iron(III) for cobalt results in almost complete liberation of Co2+ from the complex. Coprecipitation of Co2+ with Fe3+ in the form of oxohydroxides results in the liberation of Co2+ from solution into the solid phase. An excess of Fe3+ cations with respect to Co2+ and an increase of acidity, processing temperature, and aging time of the solutions at the preliminary stage results in complete liberation of cobalt from the solution for pH ≥ 12.
This is a preview of subscription content, log in via an institution to check access.
Similar content being viewed by others
References
B. E. Ryabchikov, Purification of Liquid Radwastes, DeLi print, Moscow (2008).
V. N. Epimakhov, M. S. Oleinik, E. B. Pankina, et al., Method of Decontamination of Low-Mineralized, Weakly Radioactive, Contaminated Waters under Field Conditions, RF Patent 2158449, MPK7 G 21 F 9/12, appl. June 22, 1999, 99113475/06, Byull. Izobret. Polez. Modeli, No. 30 (2010).
V. V. Omelchuk, M. R. Stakhiv, A. E. Savkin, et al., “Development of a technology and reprocessing of bottoms at the Kola nuclear power plant,” Bezop. Okruzh. Sredy, No. 3. 34–37 (2007).
A. S. Barinov, M. I. Ozhovan, A. I. Sobolev, and N. V. Ozhovan, “Potential danger of solidified radwastes,” Radiokhimiya, 32, No. 4, 127–131 (1990).
Yu. M. Vishnyakov, S. P. Malyshev, and V. M. Pchelintsev, and V. G. Khoroshev, “Small plant for complex reprocessing of liquid radwastes,” Sudostroenie, No. 3, 44–48 (1999).
A. I. Ratko and A. S. Panasyugin, “Sorption of 137Cs and 90Sr modified by sorbents based on clinoptilolite,” Radiokhimiya, 8, No. 1, 66–68 (1996).
V. N. Kosyakov, I. E. Veleshko, N. G. Yakovlev, et al., “Water-soluble chitosans as flocculents for decontamination of liquid radwastes,” ibid., 45, No. 4, 366–369 (2003).
E. P. Lokshin, V. I. Ivanenko, I. A. Udalova, and V. T. Kalinnikov, “Physicochemical validation of TiONPO4 application for purifying liquid radwastes,” ibid., pp. 357–361.
E. P. Lokshin, V. I. Ivanenko, Kh. B. Avsaragov, and V. T. Kalinnikov, “Decontamination of liquid radwastes with elevated salt content,” in: Innovation Potential of Kola Science, KNTs RAN, Apatity (2005), pp. 160–166.
G. Shwarzenbach, “Complexometric titration,” in: Comlpexometry. Theoretical Foundations and Practical Application [Russian translation], GNTI Khim. Lit. (1958), pp. 4–155.
A. F. Seliverstov, B. G. Ershov,Yu. O. Lagunov, et al., “Oxidative decomposition of EDTA in water solutions under exposure to UV radiation,” Radiokhimiya, 50, No. 1, 62–65 (2008).
V. A. Avramenko, S. Yu. Bratskaya, A. V. Voit, et al., “Application of flow-through hydrothermal technology for reprocessing concentrated liquid radwastes from nuclear power plants,” Khim. Tekhnol., 10, No. 5, 307–314 (2009).
V. I. Ivanenko, E. P. Lokshin, V. V. Vladimirova, and Kh. B. Avsaragov, “Obtaining titanium-phosphate sorbents from the products of reprocessing sphene concentrate and study of their properties,” Zh. Prikl. Khim., 78, No. 1, 66–72 (2005).
Author information
Authors and Affiliations
Additional information
Translated from Atomnaya Énergiya, Vol. 110, No. 5, pp. 285–288, May, 2011.
Rights and permissions
About this article
Cite this article
Lokshin, E.P., Ivanenko, V.I. & Korneikov, R.I. Cobalt(II) cation extraction from solutions containing ethylenediaminetetraacetate and oxalate ions. At Energy 110, 347–351 (2011). https://doi.org/10.1007/s10512-011-9433-1
Received:
Published:
Issue Date:
DOI: https://doi.org/10.1007/s10512-011-9433-1