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Silicate mercapto Duolite composite (SMDC) and activated Duolite A 101 D (AD) were prepared, characterized, and tested for uranium removal from sulfate solution using batch experiment technique. The capability of newly adsorbents for sorption of uranium was estimated and optimized under different controlling variables, including the impact of uranium initial concentration, pH of the medium, equilibrium time, temperatures, dose and interfering ions. Testing of different adsorbents for adsorption isotherms revealed that the achieved experimental data were fitting well with the Langmuir isotherm model with 68.02 mg·g -1 and 208.33 mg·g -1 as theoretical ca-* L. A. Yousef E-Mail: drlamiayousef_77@live.com [a] Nuclear Materials Authority

The leaching of thorium from representative samples collected from Abu Rusheid area, south Eastern Desert, Egypt using sulphuric acid has been studied.