| 多环芳烃室内土柱淋溶行为的CDE模型模拟 |
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| 引用本文： | 胡俊栋,陈静,王学军,叶友斌,沈琼,陶澍.多环芳烃室内土柱淋溶行为的CDE模型模拟[J].环境科学学报,2005,25(6):821-828. |
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| 作者姓名： | 胡俊栋 陈静 王学军 叶友斌 沈琼 陶澍 |
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| 作者单位： | 北京大学环境学院,地表过程分析与模拟教育部重点实验室,北京,100871;北京大学环境学院,地表过程分析与模拟教育部重点实验室,北京,100871;北京大学环境学院,地表过程分析与模拟教育部重点实验室,北京,100871;北京大学环境学院,地表过程分析与模拟教育部重点实验室,北京,100871;北京大学环境学院,地表过程分析与模拟教育部重点实验室,北京,100871;北京大学环境学院,地表过程分析与模拟教育部重点实验室,北京,100871 |
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| 基金项目： | 国家重点基础研究专项 (No.2 0 0 3CB15 0 0 4)，国家自然科学基金 (No .40 3 3 2 0 15 ,40 3 7110 5 )~~ |
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| 摘 要： | 采用土柱淋溶实验方法对多环芳烃(PAHs)在人工污染士柱中表面活性剂淋溶下的运移进行了实验室研究，获得了示踪剂Br^-和PAHs的穿透曲线(BTCs)；并通过室内批量平衡试验(PAHs和表面活性剂吸附试验和表面活性剂对PAHs吸附／解吸影响试验)获得了吸附系数，进而获得阻滞因子．基于这些实验室结果，通过CXTFIT2．1软件，用平衡CDE模型拟合了Br^-的BTCs，获得物理和水动力参数；并在此基础上应用CDE非平衡模型拟合PAHs在表面活性剂淋溶条件下土柱中的BTCs以及不同时刻、不同埋深处PAHs浓度的动态变化，预测了PAHs在土柱中的迁移趋势。
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| 关 键 词： | 多环芳烃 CDE 模拟 表面活性剂 淋溶 土柱 |
| 文章编号： | 0253-2468(2005)06-0821-08 |
| 收稿时间： | 2004/11/1 0:00:00 |
| 修稿时间： | 2004年11月1日 |
CDE model simulation of PAHs transport in laboratory soil columns |
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| HU Jundong,CHEN Jing,WANG Xuejun,YE Youbin,SHEN Qiong and TAO Shu.CDE model simulation of PAHs transport in laboratory soil columns[J].Acta Scientiae Circumstantiae,2005,25(6):821-828. |
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| Authors: | HU Jundong CHEN Jing WANG Xuejun YE Youbin SHEN Qiong and TAO Shu |
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| Institution: | College of Environmental Sciences, MOE Lab. of Earth Surface Process, Peking University, Beijing 100871, China,College of Environmental Sciences, MOE Lab. of Earth Surface Process, Peking University, Beijing 100871, China,College of Environmental Sciences, MOE Lab. of Earth Surface Process, Peking University, Beijing 100871, China,College of Environmental Sciences, MOE Lab. of Earth Surface Process, Peking University, Beijing 100871, China,College of Environmental Sciences, MOE Lab. of Earth Surface Process, Peking University, Beijing 100871, China and College of Environmental Sciences, MOE Lab. of Earth Surface Process, Peking University, Beijing 100871, China |
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| Abstract: | Polycyclic Aromatic Hydrocarbons (PAHs) transport behaviors in soil column when surfactant (LAS) worked as the leaching solvent were studied. By the soil column experiments, the breakthrough curves (BTCs) of the tracer bromide (Br-) and PAHs were obtained. The batch equilibrium experiments were conducted to achieve the absorption coefficients, and then the retardation factor (R) was calculated. A nonlinear least-squares optimization approach (CXTFIT 2.1) was used to fit BTCs of Br- and PAHs. The symmetrical BTC for Br- was best described by the equilibrium CDE model, and then the physical and hydrodynamic parameters from the fitting result were obtained, i.e. the dispersion coefficient (D). Based on these, the equilibrium and non-equilibrium CDE models were applied to fit the asymmetrical and tailing BTCs of PAHs. The comparison showed that two-site CDE model best fitted the observed data. The trends of PAHs transport at different time and depth in the soil column was also estimated using two-site CDE model. |
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| Keywords: | PAHs CDE Model simulation Surfactant leaching transport soil column |
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