| 镍和锌在粉煤灰-粘土介质中的扩散试验求解方法 |
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| 引用本文： | 席永慧,陈光敬.镍和锌在粉煤灰-粘土介质中的扩散试验求解方法[J].粉煤灰综合利用,2008(6):3-6. |
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| 作者姓名： | 席永慧 陈光敬 |
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| 作者单位： | 1. 同济大学建筑工程系,上海,200092
2. Department of Geotechnical Engineering and Geosciences,Technical University of Catalunya,Barcelona 08034,Spain |
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| 基金项目： | 国家自然科学青年基金项目(编号:50708079); 同济大学文远基金; 上海市城乡建设和交通委员会项目“上海城市污染(受损图)处置与修复关键技术研究”(重科:2008-006) |
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| 摘 要： | 进行了金属离子Zn^2＋和Ni^2＋在粉煤灰-粘土介质中的扩散试验，用Laplace方法计算出离子的扩散系数D和分布系数kd值。该方法通过Laplace转换同时求得D和kd值。为了验证该Laplace方法的正确性，把试验中间屏障部分看成半无限体，用解析解与Laplace解进行比较，结果发现：两种解的结果很接近。这一方面说明了Laplace方法的正确性，另一方面也说明了对该试验模型中长／宽为2．45／1的屏障可近似为半无限体。
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| 关 键 词： | 扩散系数 粉煤灰 Laplace方法 半无限 |
Comparison of Solutions of Diffusion Coefficients of Zn2+ and Ni2+ in Fly Ash-Clay Medium |
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| Xi Yonghui,Chen Guangjing.Comparison of Solutions of Diffusion Coefficients of Zn2+ and Ni2+ in Fly Ash-Clay Medium[J].Fly Ash Comprehensive Utilization,2008(6):3-6. |
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| Authors: | Xi Yonghui Chen Guangjing |
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| Affiliation: | ( 1. Department of Building Engineering,Tongji University , Shanghai 200092, China ; 2. Department of Geotechuiacal Engineering and Geosciences, Technical University of Catalunya, Barcelon 08034, Spain) |
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| Abstract: | Diffusion tests of Zn2+ and Ni2+ through saturated fly ash-clay medium are made.A Laplace technique is used to analyze the one-dimensional diffusion equation of the experimental model.Diffusion coefficient D and distribution coefficient k are calculated through Laplace transform technique.In order to verify the feasibility of the Laplace technique,the barrier in the middle of the test model is considered to be a half space.In such a case,an analytical solution to one-dimensional diffusion transport equation... |
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| Keywords: | diffusion coefficient Fly ash Laplace technique Diffusion half space |
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