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赵玉婷, 潘跃龙, 刘羽, 冷阳春. 粘土岩对铀(Ⅵ)的吸附性能[J]. 环境化学, 2020, (8): 2279-2286. doi: 10.7524/j.issn.0254-6108.2019072502
引用本文: 赵玉婷, 潘跃龙, 刘羽, 冷阳春. 粘土岩对铀(Ⅵ)的吸附性能[J]. 环境化学, 2020, (8): 2279-2286. doi: 10.7524/j.issn.0254-6108.2019072502
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ZHAO Yuting, PAN Yuelong, LIU Yu, LENG Yangchun. Adsorption mechanism of uranium(Ⅵ) by clay rock[J]. Environmental Chemistry, 2020, (8): 2279-2286. doi: 10.7524/j.issn.0254-6108.2019072502
Citation: ZHAO Yuting, PAN Yuelong, LIU Yu, LENG Yangchun. Adsorption mechanism of uranium(Ⅵ) by clay rock[J]. Environmental Chemistry, 2020, (8): 2279-2286. doi: 10.7524/j.issn.0254-6108.2019072502
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粘土岩对铀(Ⅵ)的吸附性能

  • 1. 西南科技大学国防科技学院, 绵阳, 621010;

  • 2. 中广核工程有限公司, 深圳, 518000

    • 通讯作者: 冷阳春, E-mail: leng_yc@swust.edu.cn
  • 基金项目:

    国家自然科学基金（41630646）和国家自然科学青年基金（41603124）资助.

Adsorption mechanism of uranium(Ⅵ) by clay rock

  • 1. College of National Defense Science and Technology, Southwest University of Science and Technology, Mianyang, 621010, China;

  • 2. China Nuclear Power Engineering Co., Ltd, Shenzhen, 518000, China

    • Corresponding author: LENG Yangchun, leng_yc@swust.edu.cn
  • Fund Project: Supported by the National Natural Science Foundation of China (41630646) and the National Natural Science Youth Fund (41603124).

  • 摘要: 以内蒙古阿拉善粘土岩为原料，采用静态吸附的方法，研究了不同因素对吸附铀（Ⅵ）效果的影响，通过吸附量和吸附率对结果进行分析.结果表明，粘土岩对铀（Ⅵ）的吸附效果较好，10 h就达到了平衡；在铀（Ⅵ）的最佳初始浓度为40 μg·mL-1时，吸附率达到最大；不同离子的影响不同，阳离子中，Mg2+的影响最大，Na+和K+几乎没影响，阴离子中，CO32-和HCO3-的影响最大，其次是SO42-，而NO3-基本没有影响；最佳固液比为1：40；吸附率和吸附量都随腐殖酸浓度的升高而减小；pH对吸附的影响较大，最佳pH值为6；吸附率和吸附量都随温度的升高而增大.Freundlich等温吸附模型较Langmuir能更好的拟合吸附过程.
    Abstract: Using the Alashan clay rock in Inner Mongolia as the raw material, the static adsorption method was used to study the influence of different factors on the adsorption of uranium (Ⅵ), and the results were analyzed by adsorption amount and adsorption rate. The results indicated that the clay rock adsorbed uranium (Ⅵ) well, and the equilibrium reached within 10 h. The optimum initial concentration of uranium (Ⅵ) was 40 μg·mL-1, and the adsorption rate reached the maximum. Different ions had different effects. Among the cations, Mg2+ had the greatest influence, Na+ and K+ had almost no effect. Among the anions, CO32- and HCO3- had the greatest influence, followed by SO42-, and NO3- had little effect. The optimum solid-liquid ratio was 1:40. Both adsorption rate and adsorption amount decreased with the increase of the concentration of humic acid. pH had a greater influence on the adsorption, and the optimal pH was 6. The adsorption rate and the adsorption amount increased with the increase of temperature. The Freundlich isotherm adsorption model fit the adsorption process better than Langmuir.
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  • 收稿日期:  2019-07-25

粘土岩对铀(Ⅵ)的吸附性能

    通讯作者: 冷阳春, E-mail: leng_yc@swust.edu.cn
  • 1. 西南科技大学国防科技学院, 绵阳, 621010;
  • 2. 中广核工程有限公司, 深圳, 518000
  • 收稿日期:  2019-07-25
基金项目:

国家自然科学基金（41630646）和国家自然科学青年基金（41603124）资助.

摘要: 以内蒙古阿拉善粘土岩为原料，采用静态吸附的方法，研究了不同因素对吸附铀（Ⅵ）效果的影响，通过吸附量和吸附率对结果进行分析.结果表明，粘土岩对铀（Ⅵ）的吸附效果较好，10 h就达到了平衡；在铀（Ⅵ）的最佳初始浓度为40 μg·mL-1时，吸附率达到最大；不同离子的影响不同，阳离子中，Mg2+的影响最大，Na+和K+几乎没影响，阴离子中，CO32-和HCO3-的影响最大，其次是SO42-，而NO3-基本没有影响；最佳固液比为1：40；吸附率和吸附量都随腐殖酸浓度的升高而减小；pH对吸附的影响较大，最佳pH值为6；吸附率和吸附量都随温度的升高而增大.Freundlich等温吸附模型较Langmuir能更好的拟合吸附过程.

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