1. Selective separation of cesium from simulated high level liquid waste solution using 1,3-dioctyloxy calix[4]arene-benzo-crown-6
- Author
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J. N. Sharma, P. V. Achuthan, Vikas Kumar, and R.C. Hubli
- Subjects
Chemistry ,Health, Toxicology and Mutagenesis ,Extraction (chemistry) ,Public Health, Environmental and Occupational Health ,Aqueous two-phase system ,Analytical chemistry ,chemistry.chemical_element ,Ether ,Pollution ,Analytical Chemistry ,chemistry.chemical_compound ,Nuclear Energy and Engineering ,Phase (matter) ,Yield (chemistry) ,Caesium ,Radiology, Nuclear Medicine and imaging ,Spectroscopy ,Equilibrium constant ,Stoichiometry ,Nuclear chemistry - Abstract
The 25,27-di(octyloxy)calix[4]arenebenzocrown-6 (CBC) in 1,3-alternate conformation was synthesized indigenously starting from its intermediates in good yield and purity. The extraction studies of CBC were carried out by using two different phase modifiers namely isodecyl alcohol and ortho-nitrophenyl hexyl ether. Detailed investigations on the effect of various parameters like, concentration of phase modifiers, aqueous phase acidity, ligand concentration, nitrate ion concentration and effect of temperature on extraction of cesium have been carried out. The concentration of phase modifiers was optimized to be 30 % in n-dodecane to ensure optimum extraction of cesium. Stoichiometry of the extracted complex determined by slope analysis method reveals 1:1:1 molar ratio for CsNO3:CBC:HNO3. The extraction process was found to be exothermic as determined from the plot of log K ex versus 1/T. The solvent system with a composition 0.01 M CBC/30 % phase modifier/n-dodecane was found to be effective for selective separation of cesium from simulated high level liquid waste solution.
- Published
- 2014
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