| 基于有机污染物扩散的复合衬垫厚度的概率设计 |
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| 引用本文： | 何俊,冶雪艳.基于有机污染物扩散的复合衬垫厚度的概率设计[J].吉林大学学报(地球科学版),2013,43(1):228-234. |
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| 作者姓名： | 何俊 冶雪艳 |
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| 作者单位： | 1.湖北工业大学土木工程与建筑学院，武汉430068;
2.吉林大学环境与资源学院，长春130021 |
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| 基金项目： | 国家自然科学基金项目(51008120);湖北省教育厅优秀中青年人才项目(Q20101408);武汉市青年科技晨光计划项目(201271031418);湖北省杰出青年人才项目(2010CDA091) |
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| 摘 要： | 有机污染物在复合衬垫中的运移以扩散方式为主。目前关于运移参数不确定性及其对衬垫性能影响的研究还不多，复合衬垫厚度的设计也没有考虑不确定性的影响。总结了运移参数已有的成果，采用蒙特卡罗法研究了半无限条件下运移参数的变异性对衬垫底部污染物质量浓度和通量的影响，并对衬垫厚度进行了设计。研究表明:土工膜中有机污染物的分配系数和扩散系数的变异性对质量浓度和通量的影响可以忽略，而土中有机污染物的扩散系数和阻滞系数的变异性对其影响则非常显著。确定性方法计算的结果偏于危险，有必要加强对土中有机污染物的扩散系数和阻滞系数概率特性的研究。以甲苯为例进行黏土衬垫厚度设计，结果表明:概率计算方法得到的黏土衬垫厚度约为确定性方法的1.71~1.81倍，采用概率方法进行衬垫设计更合理。
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| 关 键 词： | 有机污染物 扩散 变异性 失效 概率 衬垫厚度 |
| 收稿时间： | 2012-06-13 |
Probability Design of Thickness of Composite Liners Based on Organic Pollutant Diffusion |
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| He Jun,Ye Xueyan.Probability Design of Thickness of Composite Liners Based on Organic Pollutant Diffusion[J].Journal of Jilin Unviersity:Earth Science Edition,2013,43(1):228-234. |
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| Authors: | He Jun Ye Xueyan |
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| Institution: | 1.College of Civil and Architectural Engineering, Hubei University of Technology, Wuhan430068, China;
2.College of Environment and Resources, Jilin University, Changchun130021, China |
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| Abstract: | Diffusion is the main mode for organic pollutant transporting through composite liners. At present, research about the uncertainty of transport parameters and its effect on performance of liners are lack. The design method of liner thickness is mostly deterministic. Based on the existing research on the transport parameters, the effect of variability of transport parameters on concentration and flux at the base of liner using Monte Carlo method have been studied in the paper. The variability of partition coefficient and diffusion coefficient of organic pollutant through geomembrane can be neglected, while the variability of diffusion coefficient and retardation factor has very significant effect. The result of deterministic method is pronounced dangerous. So it is necessary to study the probability characteristics of diffusion and retardation of organic pollution through soils. Taking toluene as an example, the thickness of the liner is designed, which is 1.71-1.81 times of that based on certainty method. It is more reasonable to design the thickness of the liner through the transport calculation based on probabilistic perspective. |
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| Keywords: | organic pollutant diffusion variability failure probability thickness of clay liner |
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