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金属矿山 ›› 2009, Vol. 39 ›› Issue (05): 149-151+185.

• 安全与环保 • 上一篇    下一篇

壳聚糖吸附铀的机理探讨

王洁1,黄晓乃2,刘迎九2,丁德馨1   

  1. 1.南华大学铀矿冶生物技术国防重点学科实验室;2.南华大学
  • 出版日期:2009-05-15 发布日期:2011-11-09

Discussion on the Mechanism of Chitosan Adsorption for Uranium

Wang Jie1,Huang Xiaonai2,Liu Yingjiu2,Ding Dexin1   

  1. 1.Key Discipline Laboratory for National Defence for Biotechnology in Uranium Mining and  Hydrometallurgy, University of South China;2.University of South China
  • Online:2009-05-15 Published:2011-11-09

摘要: 试验探讨了壳聚糖吸附水中铀时的影响因素、吸附动力学和吸附等温线。结果表明,当溶液初始铀质量浓度1 000 mg/L,pH=5左右,壳聚糖用量2.0 g,固液比1∶50,反应时间为120 min时,壳聚糖对铀的去除率最大为94%,吸附量为1.43 mg/g。吸附过程动力学更适合二级反应,相关系数0.999 2~0.999 7,吸附等温式较符合Langmuir方程,相关系数0.997 2~0.998 4。  

关键词: 壳聚糖, 铀, 吸附机理

Abstract: The influencing factors, adsorption kinetics and adsorption isotherm of uranium adsorption on chitosan were investigated by experiments. The result shows that when the solution has an initial uranium mass concentration of 1 000 mg/L, a pH value of around 5, a chitosan dosage of 2.0 g, and a solid-liquid ratio of 1∶50, and the adsorption time is 120 min, the maximum uranium removal by chitosan can be 94% and the adsorption capacity is 1.43 mg/g. Its adsorption process is more like a second-order reaction, with a correlation coefficient of 0.999 2~0.999 7, and its adsorption isotherm is more in conformity with Langmuir equation,with a correlation coefficient of 0.997 2~0.998 4.

Key words: Chitosan, Uranium, Adsorption mechanism