| 非平衡-非线性吸附情况下填埋场污染物运移分析 |
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| 引用本文： | 栾茂田,张金利,杨庆.非平衡-非线性吸附情况下填埋场污染物运移分析[J].岩土力学,2004,25(12):1855-1861. |
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| 作者姓名： | 栾茂田 张金利 杨庆 |
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| 作者单位： | 1. 大连理工大学 海岸和近海工程国家重点实验室, 辽宁 大连 116024; 2. 大连理工大学 土木水利学院岩土工程研究所, 辽宁 大连 116024; 3. 中国科学院武汉岩土力学研究所, 湖北 武汉 430071 |
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| 基金项目： | 教育部跨世界人才培养计划研究基金项目资助(教技函[1999]2号)和中国科学院武汉岩土力学研究所前沿领域基础研究基金项目资助(No.Q110305) |
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| 摘 要： | 采用Langmuir等温吸附线方程描述非线性吸附性能, 基于改进的混合元方法，通过数值计算与分析，探讨了非平衡吸附条件下污染物运移过程及其机理。计算结果表明: 当考虑非平衡、非线性吸附性能时, 污染物穿透曲线即浓度的时程变化曲线尖锐而狭窄、峰值点前移, “拖长尾”现象不明显, 由此说明，土颗粒对污染物的非平衡、非线性吸附使得污染物的穿透能力增强, 滞留能力下降。进一步的变动参数比较分析表明：Langmuir等温线方程中的参数B、压实粘土衬里的渗透性及地下水渗流速度对污染物运移过程具有显著的影响。
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| 关 键 词： | 非平衡吸附过程 非线性吸附性能 污染物运移 穿透曲线 污染物峰值浓度 |
| 文章编号： | 1000-7598-(2004)12-1855-07 |
| 收稿时间： | 2004-04-14 |
| 修稿时间： | 2004年4月14日 |
Numerical analysis of contaminant transport process through landfill considering nonequilibrium and nonlinear sorption behaviour |
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| LUAN Mao-tian-,ZHANG Jin-li,YANG Qing.Numerical analysis of contaminant transport process through landfill considering nonequilibrium and nonlinear sorption behaviour[J].Rock and Soil Mechanics,2004,25(12):1855-1861. |
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| Authors: | LUAN Mao-tian- ZHANG Jin-li YANG Qing |
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| Institution: | 1. State Key Laboratory of Coastal and Offshore Engineering, Dalian University of Technology, Dalian 116024, China; 2. Institute of Geotechnical Engineering, School of Civil and Hydraulic Engineering, Dalian University of Technolology, Dalian 116024, China; 3. Institute of Rock and Soil Mechanics, Chinese Academy of Sciences, Wuhan 430071, China |
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| Abstract: | The Langmuir’s isothermal equation is employed to consider the nonlinear sorption characteristics. The improved mixing cell method is applied in the numerical analysis of contaminant transport in saturated porous medium. The combined effects of both nonlinear and nonequilibrium sorption on contaminant migration are examined. The computed results show that while the nonequilibrium and nonlinear sorption is considered, the breakthrough curve generally exhibits sharp fronts with a forward-shifted peak and shorten tailing. Both the parameter B in Langmuir isotherm equation and hydraulic conductivity of compacted clay liners as well as seepage velocity of groundwater play significant roles in governing contaminant transport through porous media. |
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| Keywords: | nonequilibrium sorption process non-linear sorption behaviour contaminant transport break through curve peak concentration of contaminant |
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