A sorbent of expanded rice husk powder for removal of uranyl ion from aqueous solution

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• 作者：Yong-De Zhang ; Xue-Gang Luo ; Song-Tao Huang ; Jing Wang ; You-Li Zong…
• 刊名：Rare Metals
• 出版年：2016
• 出版时间：May 2016
• 年：2016
• 卷：35
• 期：5
• 页码：425-432
• 全文大小：1,168 KB
• 刊物类别：Chemistry and Materials Science
• 刊物主题：Chemistry
  Metallic Materials
  Chinese Library of Science
  
• 出版者：Journal Publishing Center of University of Science and Technology Beijing, in co-publication with Sp
• ISSN：1867-7185
• 卷排序：35

文摘

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.KeywordsExpanded rice husk powderUraniumAdsorption