NDLI: Behavior of cadmium(II) in irradiated aqueous solutions

Content Provider	Springer Nature Link
Author	Drtivá, Barbora Pospíšil, Milan
Copyright Year	2010
Abstract	Behavior of cadmium(II) in aqueous solutions irradiated by accelerated electrons was studied. A concentration of 8.8 × 10$^{−4}$ mol L$^{−1}$ of cadmium dissolved from Cd(NO$_{3}$)$_{2}$ requires dose of 15 kGy to be effectively removed from the system containing 1 × 10$^{−2}$ mol L$^{−1}$ of HCOOK as a scavenger of OH radicals. The positive effect of deaeration with N$_{2}$O or N$_{2}$ was observed in the range of lower doses. The addition of solid modifiers (bentonite, active carbon, zeolite, Cu$_{2}$O, NiO, TiO$_{2}$ and CuO) reduced the effectivity of radiation removal of cadmium. Product of irradiation is CdCO$_{3}$. On the contrary, in the system with cadmium dissolved from CdCl$_{2}$ radiation reduction takes place. Systems contained organic complexants (ethylene diamine tetraacetic acid–EDTA, citric acid) were also studied. The solutions of Cd(NO$_{3}$)$_{2}$ containing initial concentration 2.37 × 10$^{−4}$ mol L$^{−1}$ of Cd$^{II}$ were mixed with 3 × 10$^{−4}$ mol L$^{−1}$ EDTA. In this system the efficient degradation proceeds up to 90% at a dose of 45 kGy with addition of 5 × 10$^{−3}$ mol L$^{−1}$ carbonate (pH 10.5). The product of irradiation is CdCO$_{3}$. The presence of 1 × 10$^{−2}$ mol L$^{−1}$ of HCOOK in the solution is necessary for radiation removal of cadmium complexed with citric acid (1 × 10$^{−3}$ mol L$^{−1}$) at pH 8. With increasing concentration of HCOOK (up to 5 × 10$^{−2}$ mol L$^{−1}$) decreases the pH value necessary for the radiation induced precipitation of cadmium. The best result was obtained in the system containing zeolite as a solid modifier.
Starting Page	631
Ending Page	636
Page Count	6
File Format	PDF
ISSN	02365731
Journal	Journal of Radioanalytical and Nuclear Chemistry
Volume Number	286
Issue Number	3
e-ISSN	15882780
Language	English
Publisher	Springer Netherlands
Publisher Date	2010-08-19
Publisher Place	Dordrecht
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Cadmium Radiation removal EDTA Citric acid Scavenger Inorganic Chemistry Diagnostic Radiology Nuclear Physics, Heavy Ions, Hadrons Physical Chemistry Nuclear Chemistry
Content Type	Text
Resource Type	Article
Subject	Spectroscopy Pollution Health, Toxicology and Mutagenesis Radiology, Nuclear Medicine and Imaging Analytical Chemistry Public Health, Environmental and Occupational Health Nuclear Energy and Engineering

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