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[1]YANG Hua,SHI Hui,LI Zhuo,et al.Influence of Petroleum Hydrocarbon Pollution on Soil Water Holding Characteristics and Soil Water Availability[J].Research of Soil and Water Conservation,2022,29(03):142-146.

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Influence of Petroleum Hydrocarbon Pollution on Soil Water Holding Characteristics and Soil Water Availability

Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume: 29 Number of periods: 2022 03 Page number: 142-146 Column: Public date: 2022-04-20

Title:: Influence of Petroleum Hydrocarbon Pollution on Soil Water Holding Characteristics and Soil Water Availability

Author(s):: YANG Hua, SHI Hui, LI Zhuo, HU Fan; (School of Environmental and Municipal Engineering, Key Laboratory of Northwest Water Resources and Ecological, Environment, ministry of Education, Xi'an University of Architecture and Technology, Xi'an 710055, China)

Keywords:: soil water holding characteristics; apparent soil available water content; soil water characteristic curve; diesel; crude oil

CLC:: S152.7; X53

DOI:: -

Abstract:: Petroleum hydrocarbon contaminated soil has become a serious environmental problem in China. The physical and chemical properties of the polluted soil have changed due to the pollution, which directly affects the water retention characteristics and water availability of the soil. Determining the effects of petroleum hydrocarbon pollution on soil water retention characteristics and water availability and its degree can provide a new scientific understanding for revealing the effects of petroleum hydrocarbon pollution on soil properties. We made up the contaminated soil by different pollution concentrations of diesel and crude oil, and measured these soil moisture characteristic curve by the centrifuge method. The soil water-holding characteristics and soil water availability were explored. The results show that:(1)after the soil was polluted by petroleum hydrocarbons with different concentrations of diesel oil and crude oil, the water characteristic curves were all in the lower part of the unpolluted soil, and the influence of crude oil pollution was even more significant;(2)the parameters θ_s and θ_r of the Van Genuchten model of water characteristic curve decreased exponentially with the increase of pollution concentration; the α value decreased as a power function, while the n value increased with the logarithm of the pollution concentration;(3)soil saturated water content, field water capacity and wilting water content all showed a decreasing trend with the increase of pollution concentration; the soil available water content of diesel oil and crude oil showed a U-shaped change pattern of decreasing first and then rising with the increse of pollution concentration. Whether the soil is polluted by crude oil or refined diesel, it will affect the soil water holding characteristics and water availability, and the magnitude of the impact is closely related to the type and concentration of petroleum hydrocarbons.

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Last Update: 2022-04-20