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Removal of cerium ions from aqueous solution by hydrous ferric oxide – A radiotracer study
- Dubey, Som Shankar, Rao, Battula Sreenivasa
- Journal of hazardous materials 2011 v.186 no.2-3 pp. 1028-1032
- adsorption, anions, aqueous solutions, cations, cerium, desorption, ferric oxide, irradiation, pH, temperature, tungsten oxide
- Radiotracer technique has been used to study the removal behavior of Ce (III) ions from aqueous solutions by synthesized and well characterized hydrous ferric oxide (HFO). Adsorptive concentration (10⁻⁴–10⁻⁸moldm⁻³), pH (ca 4.0–10.0) and temperature (303–333K) were examined for assessing optimal conditions for removal of these ions. The uptake of Ce (III) ions, which fitted well for Freundlich and D-R isotherms, increased with increase in the temperature and no significant desorption took place in the studied temperature range. The presence of some anions/cations affected the uptake of metal ion markedly. Irradiation of hydrous ferric oxide and tungsten oxide by using a 11.1×10⁹Bq (Ra–Be) neutron source having a neutron flux of 3.9×10⁶cm⁻²s⁻¹ with associated γ-dose rate of 1.72Gy/h did not influence the extent of adsorption of Ce (III) significantly.