Open AccessAnchoring of CoHFC nanoparticles on clinoptilolite for remedy of nuclear wastes
Author(s) -
Taher Yousefi,
Hamid Reza Mahmudian,
Meisam TorabMostaedi,
Mohammad Ali Moosavian,
Reza Davarkhah
Publication year - 2017
Publication title -
nuclear technology and radiation protection
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.31
H-Index - 16
eISSN - 1452-8185
pISSN - 1451-3994
DOI - 10.2298/ntrp1701025y
Subject(s) - sorption , clinoptilolite , adsorption , zeolite , langmuir adsorption model , aqueous solution , fourier transform infrared spectroscopy , materials science , langmuir , cobalt , ion exchange , metal ions in aqueous solution , precipitation , nuclear chemistry , chemistry , inorganic chemistry , chemical engineering , metal , ion , organic chemistry , metallurgy , physics , meteorology , engineering , catalysis
To improve the mechanical properties, the cobalt ferrocyanide precipitation was carried out on clinoptilolite as an inorganic polymer. In this work the combination of two important factors, stability (zeolite) and high adsorption capacity (cobalt ferrocyanide) were considered to improve the ions uptake ability of adsorbent. The modification was approved by X-ray diffraction, Scanning electronic microscopy and Fourier transform infrared spectroscopy. The modified zeolite was applied to remove Sr(II) and Cs(I) ions from aqueous solution in a batch system. The adsorption capacities of modified zeolite for Cs(I) and Sr(II) improved to 90 and 130 mgg-1, respectively. The Sr(II) and Cs(I) removal were investigated as a function of shaking time, pH, Sr(II), and Cs(I) initial concentration and temperature. The experimental data were fitted well to Langmuir isotherm model for two sorbet metal ions. The time dependence sorption data showed that the uptakes of Cs(I) and Sr(II) were very rapid and apparent sorption equilibriums were achieved within 100 min of contact time. The kinetic experimental data were fitted to the pseudo-first order, pseudo-second order, the double exponential, Elovich and intraparticle diffusion models. The sorption rates and capacities as well as rate constants were evaluated