Kinetics of ion flotation of Co(II)–EDTA complexes from aqueous solutions
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Mohamed A. Soliman
Abstract
The flotation kinetics of Co(II)-EDTA complexes from aqueous solutions using cetylpyridinium chloride (CPyCl) is studied and discussed in the present work. The effects of many variables on the ultimate recovery and the flotation rate are investigated. The data obtained from solutions of different pH values showed that Co(II)-EDTA complexes are successfully floated at pH 7.8. While at pH 3.4 and 11.2, both the ultimate recovery and the flotation rate are dependent on the concentration of CPyCl. Flotation of Co(II)-EDTA at different air flow rates, CPyCl concentrations and ionic strength showed that the ultimate recovery and the flotation rate are markedly affected. The other parameters (cobalt, EDTA and ethanol concentrations) had no effect on the ultimate recovery, while significantly affected the flotation rate. At the optimum conditions (Co(II) : EDTA = 1:1; CPyCl : Co(II) = 4:1; pH7.8; G = 25 cm3/min), removals more than 99% are achieved for radiocobalt. The classical first-order and the second-order kinetic models are used throughout the work to analyze the experimental kinetic data. At all the studied parameters, the kinetic data of Co(II)-EDTA complexes are better fitted to the classical first-order model.
©2015 Walter de Gruyter Berlin/Boston
Artikel in diesem Heft
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Artikel in diesem Heft
- Frontmatter
- Ground-state and isomeric-state cross sections for the 138Ce(n,2n)137Ce reaction from its threshold to 20 MeV
- Determination of the 151Sm half-life
- Kinetics of reductive stripping of Np(VI) by acetohydroxamic acid from 30%TBP/kerosene to nitrate medium using a high-speed stirred cell
- Characteristic and mechanism of Th4+ sorption from nitric acid solutions by rice and wheat bran
- Kinetics of ion flotation of Co(II)–EDTA complexes from aqueous solutions
- Preparation and biodistribution assessment of 111In-BPAMD as a novel agent for bone SPECT imaging
- Iodine-125 Chitosan-Vitamin C Complex: preparation, characterization and application
- Neutron activation analysis of polyethylene from neutron shield of EDELWEISS experiment
