| Interaction between uranium and humic acid （Ⅰ）： Adsorption behaviors of U（Ⅵ） in soil humic acids |
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| 引用本文： | WEI Min LIAO Jiali LIU Ning ZHANG Dong KANG Houjun YANG Yuanyou YANG Yong JIN Jiannan. Interaction between uranium and humic acid （Ⅰ）： Adsorption behaviors of U（Ⅵ） in soil humic acids[J]. 核技术(英文版), 2007, 18(5): 287-293. DOI: 10.1016/S1001-8042(07)60063-3 |
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| 作者姓名： | WEI Min LIAO Jiali LIU Ning ZHANG Dong KANG Houjun YANG Yuanyou YANG Yong JIN Jiannan |
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| 作者单位： | WEI Min1 LIAO Jiali1 LIU Ning1 ZHANG Dong2 KANG Houjun2 YANG Yuanyou1 YANG Yong JIN Jiannan1 (1 Key Laboratory of Radiation Physics and Technology (Sichuan University)，Ministry of Education; Institute of Nuclear Science and Technology，Sichuan University，Chengdu 610064，China; 2 Institute of Nuclear Physics and Chemistry，CAEP，Mianyang 621900，China) |
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| 基金项目： | NSFA Joint Fund (China National Natural Science Foundation and the Chinese Academy of Engineering Physics) (10476015) |
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| 摘 要： | The adsorption behaviors of uranium on three soil humic acids (HAs), which were extracted from soils of different depths at the same site, were investigated under various experimental conditions. The adsorption results showed that U(Ⅵ) in solutions can be adsorbed by the three soil HAs, with the order of FHA (HA from 5 m depth of soil) >SHA (HA from the surface) >THA (HA from 10 m depth of soil) for adsorption efficiency in each desirable condition, and the adsorption reached equilibrium in about 240 min. Although the maximum adsorption efficiency was achieved at a suitable uranium concentration (10 mg·L-1 U(Ⅵ) for SHA and THA, 20 mg·L-1 U(Ⅵ) for FHA), the adsorption could be described with Langmiur isotherm or Freundlich isotherm equation. The L/S (liquid/solid, mL/g) ratio and pH were important factors influencing the adsorption in our adsorption system besides uranium concentration. The adsorption efficiency decreased with the increase of the L/S ratio and pH at the pH range of 2.0-3.0 for SHA and THA or 2.5-6.0 for FHA. However, no significant difference in adsorption of U(Ⅵ) was observed at the experimental temperature. All the results implied that humic substances have different characteristics in samples even collected at the same site.
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| 关 键 词： | 腐殖狻 土壤 天然放射物 环境放射学 |
| 收稿时间： | 2007-05-30 |
| 修稿时间： | 2007-05-30 |
Interaction between uranium and humic acid (I): Adsorption behaviors of U(VI) in soil humic acids |
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| WEI Min,LIAO Jiali,LIU Ning,ZHANG Dong,KANG Houjun,YANG Yuanyou,YANG Yong,JIN Jiannan,. Interaction between uranium and humic acid (I): Adsorption behaviors of U(VI) in soil humic acids[J]. , 2007, 18(5): 287-293. DOI: 10.1016/S1001-8042(07)60063-3 |
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| Authors: | WEI Min LIAO Jiali LIU Ning ZHANG Dong KANG Houjun YANG Yuanyou YANG Yong JIN Jiannan |
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| Affiliation: | 1. Key Laboratory of Radiation Physics and Technology (Sichuan University), Ministry of Education; Institute of Nuclear Science and Technology, Sichuan University, Chengdu 610064, China;2. Institute of Nuclear Physics and Chemistry, CAEP, Mianyang 621900, China;1. Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, PR China;2. School of Nuclear Science and Technology, University of Chinese Academy of Sciences, Beijing 100049, PR China |
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| Abstract: | The adsorption behaviors of uranium on three soil humic acids (HAs), which were extracted from soils of different depths at the same site, were investigated under various experimental conditions. The adsorption results showed that U(VI) in solutions can be adsorbed by the three soil HAs, with the order of FHA (HA from 5 m depth of soil) >SHA (HA from the surface) >THA (HA from 10m depth of soil) for adsorption efficiency in each desirable condition, and the adsorption reached equilibrium in about 240 min. Although the maximum adsorption efficiency was achieved at a suitable uranium concentration (10 mg•L−1 U(VI) for SHA and THA, 20 mg•L−1 U(VI) for FHA), the adsorption could be described with Langmiur isotherm or Freundlich isotherm equation. The L/S (liquid/solid, mL/g) ratio and pH were important factors influencing the adsorption in our adsorption system besides uranium concentration. The adsorption efficiency decreased with the increase of the L/S ratio and pH at the pH range of 2.0–3.0 for SHA and THA or 2.5 – 6.0 for FHA. However, no significant difference in adsorption of U(VI) was observed at the experimental temperature. All the results implied that humic substances have different characteristics in samples even collected at the same site. |
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| Keywords: | Soil Humic acid Uranium Extraction Adsorption Effect factors |
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