Uranium Removal from Its Liquid Waste Using ChemicallyTreated Rice Husk

In this study, rice husk (RH) was modified by HCl and HNO3, and the activated RHs were used as adsorbents for removal of UO22+ ions from aqueous solutions through batch equilibrium technique. Materials and methods: The influence of pH, equilibrium time,temperature, adsorbent dosage, and initial uranium concentration on adsorption percent was investigated. Results: Obtained results declaredthat the pH of aqueous solutions had affected UO22+ ions removal, which was indicated by the increased removal efficiency with increasingsolution pH till pH 3. Conclusion: Experimental data were verified with Langmuir and other isotherms and were found to be well fitting withLangmuir isotherm models. A feasibility study for the whole process was performed.

Keywords:

Adsorption , feasibility study , isotherm models , modified rice husk , uranium