In this paper, the contents of polycyclic aromatic hydrocarbons (PAHs) in soil samples around three different oily sludge
plants in winter were analyzed by high performance liquid chromatography (HPLC) and the pollution degree with PAHs in soil
samples was determined. Soil samples were collected from the agricultural soil around three different oily sludge plants (the
Third Wenming Plant, the Third Mazhai Plant, and the Fourth Wener Plant) along with the leeway in Zhongyuan oil field. The
distances from collected sample sites to oily sludge plants are 10, 20, 50, 100, 200, and 500 m, respectively. The results
show that the contents of PAHs in soil samples decrease dramatically with the increase of the distance from the oily sludge,
and that the PAHs with 2–4 rings are major pollutants in the oily sludge and soil samples. The main factors, which influenced
the distribution of PAHs are discussed. Based on Nemero Index P, the classification evaluation shows that the soils around
the oily sludge are heavily polluted in winter. The health risk assessment and ecological risk assessment of the soils around
the oily sludge in Zhongyuan oil field in winter are analyzed. 相似文献
The transversely isotropic (TISO) constitutive and frost heave models for the freezing of fine-grained soils are more accurate than the isotropic model and simpler than the orthotropic models. First, in combination with the mesoscopic composition of freezing soils, a mechanical model for the interaction between the equivalent ice lens and the soil in frozen soils is established based on the series and parallel models in the theory of composite mechanics. Second, the TISO constitutive model together with the analytic expression of five elastic constants is provided for analysis of the freezing soils. Third, a preliminary elastoplastic model for TISO freezing soil is established based on the Hill plastic model. Fourth, the heat–moisture–deformation coupling TISO model and the hydrodynamic frost heave model are derived according to a thermodynamics equation, a soil water motion equation, and generalized Hooke’s law. Synchronization and uniformity of the TISO constitutive model and the TISO frost heave model are realized for analyzing the interaction between permafrost soils and buildings. Finally, an indoor standard frost heave test and the frost heave of a prototype canal are simulated based on the above models. The numerical results indicated that the models presented in this paper accurately described the frost heave and revealed the interaction between permafrost and buildings.