Pollution halo layered observation device and method for simulating pollutant contaminated soil

Abstract

The invention relates to a pollution halo layered observation device and method for simulating pollutant contaminated soil. The device comprises a soil sample box and a feeding device for feeding pollutants, wherein the feeding device is positioned above a feeding box; the soil sample box is formed by splicing multiple soil layer cavities (1) which are laminated vertically; and a calibrated scale (5) is arranged on a side plate of the soil layer cavities (1). The observation method comprises the following steps of: 1, borrowing soil; 2, feeding pollutants into the soil sample box through the feeding device; 3, separating the soil sample box into independent soil layer cavities; 4, projecting a pollutant range on the soil surface layer in each soil layer cavity to a two-dimensional coordinate system by using the calibrated scale; and 5, projecting a two-dimensional projection drawing on the soil surface layer in each soil layer cavity into a three-dimensional coordinate system according to the height position of the soil surface layer in each soil layer cavity, and connecting to form a three-dimensional pollution halo. According to the observation device and method, the pollution halo can be conveniently, directly and accurately observed on the basis that the influence to the soil structure is minimum.

Description

technical field [0001] The invention relates to the field of soil pollution observation, in particular to a pollution halo layered observation device and method for simulating pollutant-contaminated soil. Background technique [0002] With the acceleration of urbanization and the continuous development of industry, various pollutions caused by human factors to the soil in the vadose zone are also intensified. Heavy metals from factories, radioactive materials, seepage from landfills, and spills of petroleum hydrocarbons threaten vadose zone soils. The soil in the vadose zone is a necessary resource for human survival, and it is also a channel for pollutants to migrate to groundwater. The pollution in the vadose zone is called "invisible pollution". At present, my country's soil pollution is becoming more and more serious, and the soil in the vadose zone is polluted to varying degrees, which poses a serious threat to the ecological environment, food safety and sustainable ag...

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Problems solved by technology

[0003] Soil pollution in the vadose zone is irreversible, so pollution should be mainly focused on prevention. However, due to the lack of human understanding of the vadose zone, it is difficult to prevent and control the pollution of the vadose zone

In recent years, experts at home and abroad have conducted extensive research on the pollution of vadose zone soil, but because the vadose zone is underground, it is inconvenient to observe, and it is difficult to directly study the law of pollutant migration

Although some numerical simulation software can be used to simulate the pollution halo in the process of pollutants polluting the vadose zone, but the error is too large to study the mechanism of pollutant migration in depth

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