Abstract
The adsorption of {sup 99}Tc on the adsorbers Fe, Fe{sub 2}O{sub 3} and Fe{sub 3}O{sub 4} was studied by batch experiments under aerobic and anoxic conditions. The effects of pH and CO{sub 3}{sup 2-} concentration of the simulated ground water on the adsorption ratios were also investigated, and the valences of Tc in solution after the adsorption equilibrium were studied by solvent extraction. The adsorption isotherms of TcO{sub 4}{sup -} on the adsorbers Fe, Fe{sub 2}O{sub 3} and Fe{sub 3}O{sub 4} were determined. Experimental results have shown that the adsorption ratio of Tc on Fe decreases with the increase of pH in the range of 5-12 and increases with the decrease of the CO{sub 3}{sup 2-} concentration in the range of 10{sup -8}M-10{sup -2}M. Under aerobic conditions, the adsorption ratios of {sup 99}Tc on Fe{sub 2}O{sub 3} and Fe{sub 3}O{sub 4} were not influenced by pH and CO{sub 3}{sup 2-}concentration. When Fe was used as adsorbent, Tc existed mainly in the form of Tc(IV) after equilibrium and in the form of Tc(VII) when the adsorbent was Fe{sub 2}O{sub 3} or Fe{sub 3}O{sub 4} under aerobic conditions. The adsorption ratios of Tc on Fe, Fe{sub 2}O{sub 3} and Fe{sub 3}O{sub 4}
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Citation Formats
Liu, D J, and Fan, X H.
Adsorption behavior of {sup 99}Tc on Fe, Fe{sub 2}O{sub 3} and Fe{sub 3}O{sub 4}.
Hungary: N. p.,
2005.
Web.
doi:10.1007/s10967-005-0772-z.
Liu, D J, & Fan, X H.
Adsorption behavior of {sup 99}Tc on Fe, Fe{sub 2}O{sub 3} and Fe{sub 3}O{sub 4}.
Hungary.
https://doi.org/10.1007/s10967-005-0772-z
Liu, D J, and Fan, X H.
2005.
"Adsorption behavior of {sup 99}Tc on Fe, Fe{sub 2}O{sub 3} and Fe{sub 3}O{sub 4}."
Hungary.
https://doi.org/10.1007/s10967-005-0772-z.
@misc{etde_20618059,
title = {Adsorption behavior of {sup 99}Tc on Fe, Fe{sub 2}O{sub 3} and Fe{sub 3}O{sub 4}}
author = {Liu, D J, and Fan, X H}
abstractNote = {The adsorption of {sup 99}Tc on the adsorbers Fe, Fe{sub 2}O{sub 3} and Fe{sub 3}O{sub 4} was studied by batch experiments under aerobic and anoxic conditions. The effects of pH and CO{sub 3}{sup 2-} concentration of the simulated ground water on the adsorption ratios were also investigated, and the valences of Tc in solution after the adsorption equilibrium were studied by solvent extraction. The adsorption isotherms of TcO{sub 4}{sup -} on the adsorbers Fe, Fe{sub 2}O{sub 3} and Fe{sub 3}O{sub 4} were determined. Experimental results have shown that the adsorption ratio of Tc on Fe decreases with the increase of pH in the range of 5-12 and increases with the decrease of the CO{sub 3}{sup 2-} concentration in the range of 10{sup -8}M-10{sup -2}M. Under aerobic conditions, the adsorption ratios of {sup 99}Tc on Fe{sub 2}O{sub 3} and Fe{sub 3}O{sub 4} were not influenced by pH and CO{sub 3}{sup 2-}concentration. When Fe was used as adsorbent, Tc existed mainly in the form of Tc(IV) after equilibrium and in the form of Tc(VII) when the adsorbent was Fe{sub 2}O{sub 3} or Fe{sub 3}O{sub 4} under aerobic conditions. The adsorption ratios of Tc on Fe, Fe{sub 2}O{sub 3} and Fe{sub 3}O{sub 4} decreased with the increase of pH in the range of 5-12 and increased with the decrease of the CO{sub 3}{sup 2-} concentration in the range of 10{sup -8}M-10{sup -2}M under anoxic conditions. Tc existed mainly in the form of Tc(IV) after equilibrium when Fe, Fe{sub 2}O{sub 3} and Fe{sub 3}O{sub 4} was the adsorbent under anoxic conditions. The adsorption isotherms of TcO{sub 4}{sup -} on the adsorbers Fe, Fe{sub 2}O{sub 3} and Fe{sub 3}O{sub 4} are fairly in agreement with the Freundlich's equation under both aerobic and anoxic conditions. (author)}
doi = {10.1007/s10967-005-0772-z}
journal = []
issue = {3}
volume = {264}
journal type = {AC}
place = {Hungary}
year = {2005}
month = {Jun}
}
title = {Adsorption behavior of {sup 99}Tc on Fe, Fe{sub 2}O{sub 3} and Fe{sub 3}O{sub 4}}
author = {Liu, D J, and Fan, X H}
abstractNote = {The adsorption of {sup 99}Tc on the adsorbers Fe, Fe{sub 2}O{sub 3} and Fe{sub 3}O{sub 4} was studied by batch experiments under aerobic and anoxic conditions. The effects of pH and CO{sub 3}{sup 2-} concentration of the simulated ground water on the adsorption ratios were also investigated, and the valences of Tc in solution after the adsorption equilibrium were studied by solvent extraction. The adsorption isotherms of TcO{sub 4}{sup -} on the adsorbers Fe, Fe{sub 2}O{sub 3} and Fe{sub 3}O{sub 4} were determined. Experimental results have shown that the adsorption ratio of Tc on Fe decreases with the increase of pH in the range of 5-12 and increases with the decrease of the CO{sub 3}{sup 2-} concentration in the range of 10{sup -8}M-10{sup -2}M. Under aerobic conditions, the adsorption ratios of {sup 99}Tc on Fe{sub 2}O{sub 3} and Fe{sub 3}O{sub 4} were not influenced by pH and CO{sub 3}{sup 2-}concentration. When Fe was used as adsorbent, Tc existed mainly in the form of Tc(IV) after equilibrium and in the form of Tc(VII) when the adsorbent was Fe{sub 2}O{sub 3} or Fe{sub 3}O{sub 4} under aerobic conditions. The adsorption ratios of Tc on Fe, Fe{sub 2}O{sub 3} and Fe{sub 3}O{sub 4} decreased with the increase of pH in the range of 5-12 and increased with the decrease of the CO{sub 3}{sup 2-} concentration in the range of 10{sup -8}M-10{sup -2}M under anoxic conditions. Tc existed mainly in the form of Tc(IV) after equilibrium when Fe, Fe{sub 2}O{sub 3} and Fe{sub 3}O{sub 4} was the adsorbent under anoxic conditions. The adsorption isotherms of TcO{sub 4}{sup -} on the adsorbers Fe, Fe{sub 2}O{sub 3} and Fe{sub 3}O{sub 4} are fairly in agreement with the Freundlich's equation under both aerobic and anoxic conditions. (author)}
doi = {10.1007/s10967-005-0772-z}
journal = []
issue = {3}
volume = {264}
journal type = {AC}
place = {Hungary}
year = {2005}
month = {Jun}
}