Analysis of water retention characteristics of oil-polluted earthy materials with different textures based on van Genuchten model

Analysis of water retention characteristics of oil-polluted earthy materials with different... Purpose The water retention characteristics of polluted soil systems are affected not only by the properties of the soil (e.g., texture) but also by those of the pollutants. This study aimed to evaluate the effect of oil pollution on the water-holding capacity of earthy materials with different textures. Materials and methods Three earthy materials (Lou, Loessial, and Aeolian sandy earthy materials) with different textures were treated with crude oil at five pollution levels (0, 0.5, 1, 2, and 4%). The soil water retention curve (SWRC) obtained for each treated sample was analyzed using the van Genuchten model. Results and discussion Oil pollution resulted in lower soil water retention in each case, with a leftward shift of the corresponding SWRC, and led to a decrease in the saturated water content of the earthy material, characterized by a marked increase in incomplete saturation, and a decrease in the residual water content (i.e., irreducible saturation). Oil pollution also determined a marked increase in the slope of the SWRC. The response of the SWRC to oil pollution was significantly influenced by the texture of earthy material, and the saturated water content of all earthy materials was strongly affected by the level of oil http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Journal of Soils and Sediments Springer Journals

Analysis of water retention characteristics of oil-polluted earthy materials with different textures based on van Genuchten model

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Publisher
Springer Berlin Heidelberg
Copyright
Copyright © 2018 by Springer-Verlag GmbH Germany, part of Springer Nature
Subject
Environment; Soil Science & Conservation; Environment, general; Environmental Physics
ISSN
1439-0108
eISSN
1614-7480
D.O.I.
10.1007/s11368-018-2026-z
Publisher site
See Article on Publisher Site

Abstract

Purpose The water retention characteristics of polluted soil systems are affected not only by the properties of the soil (e.g., texture) but also by those of the pollutants. This study aimed to evaluate the effect of oil pollution on the water-holding capacity of earthy materials with different textures. Materials and methods Three earthy materials (Lou, Loessial, and Aeolian sandy earthy materials) with different textures were treated with crude oil at five pollution levels (0, 0.5, 1, 2, and 4%). The soil water retention curve (SWRC) obtained for each treated sample was analyzed using the van Genuchten model. Results and discussion Oil pollution resulted in lower soil water retention in each case, with a leftward shift of the corresponding SWRC, and led to a decrease in the saturated water content of the earthy material, characterized by a marked increase in incomplete saturation, and a decrease in the residual water content (i.e., irreducible saturation). Oil pollution also determined a marked increase in the slope of the SWRC. The response of the SWRC to oil pollution was significantly influenced by the texture of earthy material, and the saturated water content of all earthy materials was strongly affected by the level of oil

Journal

Journal of Soils and SedimentsSpringer Journals

Published: May 30, 2018

References

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