الفهرس 
Essential properties of uraniumOnly 14 pages are availabe for public view
 |  | from | 136 |  |  |
| | | from | 136 | | |
Abstract
Hp-8 microporous chelating resin that characterized by FTIR and TGA,
it contains divinylbenzene crosslinked structure, sulfonic type functional
group and secondary amine group.In haighly acidic concentration of acid
secondery mines acts as a good chelating group for uranyl ions while in
moderetly acidic solution sulphonic groups act as ion exchanger.
According to the TGA curves, there are three temperature ranges observed in
which the majority of the weight variations for Hp-8 resin occur.at first there
is weight loss about 5.87% at temperature 112.87 to 242.120C, then fast
degradation with weight loss about 23.574% at temperature around 344.890C
leaving remaining mass about 70.513% and finally complete degradation with
weight loss 42.004% at temperature higher than 502.730C.
This resin can be used as an efficient and economical sorbent to adsorb U (II)
and Gd (III). The adsorption of uranium from a synthetic solution onto the
chelating resin in this study might be optimised. The ideal adsorption
circumstances, sorption isotherm models, kinetics characteristic models, and
thermodynamic parameters are identified. On the extent of sorption, the
effects of pH, contact time, temperature, and initial uranium concentrations
have been investigated. The findings reveal that is a good adsorbent for U (II).
The radioactive ion could be absorbed and formed a stable complex over a
wide pH range. At the current experimental condition, it is discovered that a
pH range of 3 is the optimal environment for U sorption, and that uranium
sorption efficiency peaks, at room temperature, 0.5 g of resin required 60
minutes to interact with 50 mL of a synthetic solution containing 200 mg/L of
uranium. Pseudo-second order kinetics governs the sorption process. The
frendluich isotherm is found to be obeyed by the experimental result