[1]CUI Song,FU Qiang,LI Tianxiao,et al.Effect of Soil Temperature on Migration Behavior of Organic Pollutants During Freeze-Thaw Period[J].Research of Soil and Water Conservation,2016,23(03):314-320.
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Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume:
23
Number of periods:
2016 03
Page number:
314-320
Column:
Public date:
2016-06-28
- Title:
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Effect of Soil Temperature on Migration Behavior of Organic Pollutants During Freeze-Thaw Period
- Author(s):
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CUI Song1,2, FU Qiang1,2, LI Tianxiao1,2, LI Yifan3
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1. School of Water Conservancy & Civil Engineering, Northeast Agricultural University, Harbin 150030, China;
2. International Joint Research Center for Persistent Toxic Substances, Northeast Agricultural University, Harbin 150030, China;
3. International Joint Research Center for Persistent Toxic Substances, Harbin Institute of Technology, Harbin 150090, China
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- Keywords:
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freeze-thaw period; soil temperature; organic pollutants; migration behavior
- CLC:
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X592;S152.8
- DOI:
-
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- Abstract:
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In order to understand soil effects of temperatures in different vertical layers on migration and diffusion behavior of organic pollutants during freeze-thaw period, the coefficient of migration and diffusion flux was used to assess the migration behavior of the soil-air exchange layer and adjacent soil layers. We deeply discussed the soil temperature effect on migration of organic pollutants and systematically analyzed differences on simulation results applying different temperature data. The results show that the migration and diffusion D value of α-HCH in deep soil was related with the thickness of soil layer; the soil temperatures of different vertical layers affected the migration and diffusion behavior of α-HCH; the change of diurnal average air temperature strongly affected the environmental behavior of α-HCH at soil-air exchange layer (R=0.999, p=0.000); the established regression equation between diurnal average air temperature and soil vertical layer temperature could well coincide with measured temperatures of different soil depths: y=-0.788+0.818x (3 cm, R=0.964, p < 0.01);y=-1.214+0.705x (10 cm, R=0.942, p < 0.01); y=0.912+0.474x (20 cm, R=0.836, p < 0.01);y=1.004+0.361x (40 cm, R=0.714, p < 0.01);The relative error of migration and diffusion D value used to predict temperature was less than using diurnal average air temperature as surrogate data. The established regression equation applying diurnal average air temperature in this study has great significance for examining the soil temperature effects of different vertical layers on migration and diffusion behavior of organic pollutants, and can further improve and enhance the accuracy of simulation results applying multimedia environmental modeling and diffusion modeling.