| 毛细管法研究pH值对放射性核素152+154Eu(III)在紧密皂土中的扩散影响 |
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| 引用本文： | 陈磊,王祥学.毛细管法研究pH值对放射性核素152+154Eu(III)在紧密皂土中的扩散影响[J].山东理工大学学报,2006,20(2). |
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| 作者姓名： | 陈磊 王祥学 |
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| 作者单位： | 山东理工大学化学工程学院 山东淄博255049(陈磊)，中国铝业公司山东分公司 山东淄博255051(王祥学) |
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| 摘 要： | 利用毛细管法研究了pH值对放射性核素152 154Eu在紧密皂土中的吸附和扩散影响.实验结果与Fick定律理论计算值非常一致,与近似条件下其他方法的测量结果非常相近,表明毛细管法的正确性.研究结果表明,放射性核素152 154Eu(III)在紧密皂土中的扩散随pH值的升高而减小,152 154Eu(III)在紧密皂土上的吸附随pH值的升高而增加,Eu(III)在皂土上吸附的分配系数随皂土密度的增加而减小.皂土的密度(皂土的空隙数)对放射性核素的吸附、扩散和迁移起重要的作用.
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| 关 键 词： | 皂土 放射性核素152 154Eu(III) 扩散 吸附 |
Effect of pH on the diffusion of 152+154Eu(III) in compacted bentonite studied with capillary method |
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| CHEN Lei,WANG Xiang-xue.Effect of pH on the diffusion of 152+154Eu(III) in compacted bentonite studied with capillary method[J].Journal of Shandong University of Technology:Science and Technology,2006,20(2). |
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| Authors: | CHEN Lei WANG Xiang-xue |
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| Abstract: | Effect of pH on the sorption and diffusion of ~(152 154)Eu in compacted bentonite was studied with capillary method.The results fit the Fick's second law very well and in good agreement with the literature data under similar experimental conditions,this indicates the validity of the capillary method.The results suggest that diffusion of ~(152 154)Eu in compacted bentonite decreases with the increase of pH and the sorption of ~(152 154)Eu increases with the increase of pH,the distribution coefficients of Eu(III) sorption decreases with the increase of bentonite bulk density.The intensity of bentonite,i.e.,the interlaminary space of compacted bentonite,contributes significantly to the diffusion and sorption of radionuclides in compacted bentonite. |
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| Keywords: | bentonite radionuclide ~(152 154)Eu diffusion sorption |
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