Soil leaching device for researching heavy metal pollution source-sink relationship

The utility model discloses a soil leaching device used for studying a heavy metal pollution source-sink relationship, the device comprises a rainwater storage tank and a leaching column, the rainwater storage tank is communicated with a top cover of the leaching column through a hose, the hose is provided with a peristaltic pump used for adjusting the flow velocity of rainwater, and the peristaltic pump is communicated with the leaching column. A soil filling area, a filtering device and a water distribution device are arranged in the leaching column, the filtering device is located at the bottom of the soil filling area, the water distribution device is located at the top of the soil filling area, and a drain valve is arranged at the bottom end of the leaching column. The device can better simulate the natural environment, studies the migration and transformation rule of heavy metal in soil through rainwater spraying, analyzes the source-sink relationship of heavy metal pollution according to the migration