Abstract
A novel sorbent for the removal of uranyl ion was prepared by expanded rice husk powder. Batch adsorption experiments were performed on factors of pH, temperature, initial uranyl ion concentration, adsorbent dosage and contact time to evaluate the adsorption capacity. The results show that the saturation adsorption capacity is 5.7 mg·g−1 using expanded rice husk powder treating uranyl ion aqueous solution (80 mg·L−1) for 24 h at 25 °C with initial pH 3. Adsorption process could be well described by Langmuir isotherm model. The adsorption kinetic data are fitted well with pseudo-second-order model. The results obtained show that expanded rice husk adsorbent is a promising adsorbent for the removal of uranium from aqueous solutions.
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Acknowledgments
This study was financially supported by the National Natural Science Foundation of China (No. 21406182), the National Decommissioning of Nuclear Facilities and Radioactive Waste Management Research Projects Focus, State Administration of Science, Technology and Industry for National Defense (SASTIND), China (No. 2014-806), and the Science and Technology Project of Qinghai Province (No. 2014-GX-Q04).
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Zhang, YD., Luo, XG., Huang, ST. et al. A sorbent of expanded rice husk powder for removal of uranyl ion from aqueous solution. Rare Met. 35, 425–432 (2016). https://doi.org/10.1007/s12598-016-0715-6
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DOI: https://doi.org/10.1007/s12598-016-0715-6