Vertical migration of phenol in air-dried soil under capillary effect |
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| Authors: | Zhu Kun Liu Zhaochang Liu Xiang |
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| Institution: | 1. Research Group of Groundwater Pollution, Department of Environmental Engineering, Tsinghua University, 100084, Beijing, The People's Republic of China
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| Abstract: | Migration of pollutants in soils obeys the advection-dispersion law in the direction of decreasing the concentration. However, some of the organic chemicals carried by capillary water in air-dried soils could show unusual reversing distribution, i.e. concentration close to the pollution source seemed lower while the highest concentration appeared far from the pollution source. Column tests were carried out to verify the reversing phenomena of concentration distribution, and solutions of phenol, a detergent (LAS), Vitamin-C, Cl? and Ca2+ were utilized to investigate the migration regulation. It was found that the reversing phenomena could occur only in air-dried soils affected by capillary flow and depended on the chemical properties and vapor-phase of pollutants, but the soil properties or arrangement, or combination of soil layers did not affect the reversing phenomena. |
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