Device for simulating soil pollution release in different soil environment conditions

Abstract

The invention discloses a device for simulating soil pollution release in different soil environment conditions. The device comprises at least a sample pot used for containing a soil sample, the sample pot is internally provided with a water distribution device, the bottom of the sample pot is provided with a liquid outlet, a lower side of the sample pot is communicated with a gas inlet pipe, an inlet end of the gas inlet pipe is provided with a gas generating device, and the gas inlet pipe is in series connection with a gas flowmeter, a gas temperature control device and a gas moisture control device. The water distribution device is used for simulating the release of pollutants in a sprinkling or rain falling condition, the gas pressure in the sample pot is adjusted by a pressure system,the soil condition in different temperature conditions can be simulated by the gas temperature control device, and the soil condition in different moisture conditions can be simulated by the gas moisture control device; after the gas temperature control device and the gas moisture control device are arranged in series, the device can be better used for simulating multiple soil environment conditions such as dry cold, clamminess, dry heat, wet heat, anaerobism and aerobiosis. The device is used in the field of pollutant simulation tests.

Description

technical field [0001] The invention relates to the field of pollutant simulation testing, in particular to a device for simulating soil pollution release under different soil environmental conditions. Background technique [0002] Pollutants in soil and sediment are closely related to groundwater and food chain pollution risks, and their release, migration and transformation behaviors have received extensive attention. The release, migration and transformation of pollutants are affected by a series of soil environmental factors, mainly including soil texture, pH value, temperature, moisture content, soil gas type and content, etc. Although the environmental factors of the soil are unstable, the content of pollutants in the polluted soil can be changed and the environmental quality can be improved by studying the environment that is most suitable for the release, migration and transformation of pollutants in the soil. In order to accurately grasp the release, migration and ...

AI Technical Summary

Problems solved by technology

[0003] Existing experimental devices for studying the release of pollutants often simulate a single experimental environmental condition, such as the influence of soil temperature, soil texture, etc.

However, soil is a very complex system composed of solid particles (mineral and organic matter), water and gas. Changes in factors may cause corresponding changes in other factors, and these changes will cause corresponding changes in the release, migration and transformation of soil pollutants. Therefore, only a single environmental condition is considered and the interaction of multiple soil environmental factors is ignored. It is difficult to simulate the differences in the release, migration and transformation of soil pollutants under the influence of different environmental factors in the natural environment

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