| 挥发性有机污染物在土壤中的运移机制与模型 |
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| 引用本文： | 彭胜,陈家军,王红旗.挥发性有机污染物在土壤中的运移机制与模型[J].土壤学报,2001,38(3):315-323. |
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| 作者姓名： | 彭胜 陈家军 王红旗 |
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| 作者单位： | 北京师范大学环境科学研究所, |
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| 基金项目： | 高等学校博士学科点专项科研基金资助项目(98002712) |
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| 摘 要： | 挥发性有机污染物在土壤多孔介质中有三种可能的存在状态：溶于水中、挥发为气体及吸附于固体颗粒。挥发性有机污染物在水、气、固体颗粒三相间的物质交换与分配是决定其运移的重要因素，在相间物质交换为平衡的条件下，可用阻滞系数来表示其影响，污染物与土壤固体颗粒间的非平衡吸附解吸是相间交换中影响污染物运移的最重要的机制，由于天然土壤具有固有的不均质性，必须用多个反应系数才能准确描述污染物与固体颗粒间的非平衡吸附解吸。
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| 关 键 词： | 污染物运移 物质交换 非平衡吸附解吸 挥发性有机物 土壤污染 |
| 收稿时间： | 1999/11/17 0:00:00 |
| 修稿时间： | 1999年11月17 |
THE MECHANISMS AND MODELS OF VOLATILE CONTAMINANTS TRANS PORTING IN SOILS |
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| Peng Sheng,Chen Jia-jun and Wang Hong-qi.THE MECHANISMS AND MODELS OF VOLATILE CONTAMINANTS TRANS PORTING IN SOILS[J].Acta Pedologica Sinica,2001,38(3):315-323. |
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| Authors: | Peng Sheng Chen Jia-jun and Wang Hong-qi |
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| Institution: | Institute of Environmental Sciences, Beijing Normal University, State Key Joint Laboratory of Environmental Simulation and Pollution Control, Beijing 100875;Institute of Environmental Sciences, Beijing Normal University, State Key Joint Laboratory of Environmental Simulation and Pollution Control, Beijing 100875;Institute of Environmental Sciences, Beijing Normal University, State Key Joint Laboratory of Environmental Simulation and Pollution Control, Beijing 100875 |
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| Abstract: | Volatile contaminants exist in soils in three possible forms: dissolved in water, volatilized as vapor, and adsorbed by solid particles.The mass partitioning or sorption between them is an important factor that affects contaminant transport, which could be represented by retardation coefficient in the case of that equilibrium partitioning or sorption is attained.The most important mechanism affecting contaminant transport is nonequilibrium in sorption and desorption occurring in soil between solid particles and water phase, which should be described with a series of coefficients due to the innate particle-scale heterogeneity of soils. |
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| Keywords: | Contaminant transport Mass partitioning Nonequilibrium sorption-desorption |
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