Soil heavy metal migration and transformation simulating device

Abstract

The invention relates to a soil heavy metal migration and transformation simulating device. The device comprises a leaching column, a liquid storage system, multiple collection and detection units and a data acquisition and control system, variation of soil water potential in the leaching column is controlled through the liquid storage system, and thereby migration and transformation of heavy metal in soil are achieved. Leaching solutions in the leaching column are collected and detected through the collection and detection units, and leaching solution parameters and soil parameters can be acquired, stored and controlled through the data acquisition and control system. The simulating device integrates the functions of leaching solution storage, collection and detection and data acquisition, the structure is compact, the operation is convenient, a parameter optimization means is provided for establishing a migration and transformation model of heavy metal ions in soil, the test cycle is shortened, test precision is improved, a research result is more scientific and reliable, and the simulating device is a tool for conducting experimental research such as soil heavy metal ion migration.

Description

technical field [0001] The invention relates to the technical field of environmental geotechnical engineering, in particular to a soil heavy metal migration and conversion simulation device. Background technique [0002] According to the National Soil Pollution Survey Bulletin issued by the Ministry of Environmental Protection, the overall soil environment in the country is not optimistic. Some areas have serious soil pollution, the soil environment quality of cultivated land is worrying, and the soil environment problems of industrial and mining wasteland are prominent. The total exceeding rate of national soil is 16.1%, of which the proportions of slightly, lightly, moderately and heavily polluted sites are 11.2%, 2.3%, 1.5% and 1.1% respectively. Inorganic pollutants are the main type of pollution, followed by organic pollutants, and compound pollutants account for 82.8% of the total. The survey results show that heavy metal pollution accounts for a considerable proporti...

AI Technical Summary

Problems solved by technology

[0005] A soil heavy metal migration and conversion simulation device provided by the present invention solves or partially solves the problem that the method in the prior art can only do the heavy metal migration test in soil saturated water, which leads to unscientific test results, long experiment period and the authenticity of the experiment. And the technical problems that the accuracy cannot be verified have achieved the technical effect of short test period, small experimental error, high test accuracy and dynamic monitoring of the migration and transformation process of heavy metals in the soil.

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