Method and system for determining heavy metal migration trend in soil

Abstract

The invention provides a method and a system for determining a heavy metal migration trend in soil. The method comprises the steps of 1) selecting a soil area contaminated with heavy metals; 2) determining a test area in the area; 3) setting sampling points in the test area and sampling at the sampling points at different depths; 4) measuring the heavy metal content in each sampling point at different depths, averaging the measured heavy metal content to obtain the heavy metal content in real soil, the heavy metal content in the overground part and heavy metal content in underground part of each plant in the test area; and 5) comparing the heavy metal content in the overground part and the heavy metal content in underground part of each plant with the heavy metal content in the real soil to obtain the heavy metal migration trend. The method and the system provided by the invention can determine the heavy metal migration trend accurately, and provide reference data for obtaining plant species suitable for repairing the soil contaminated with the heavy metals and solving the problem that the soil contaminated with the heavy metals can not well match with the plant species for repairing the contaminated soil.

Description

technical field [0001] The invention relates to the field of remediation of heavy metal polluted soil, in particular to a method and system for determining the migration tendency of heavy metals in soil. Background technique [0002] The production and utilization of coal have made great contributions to human civilization and social progress, but with the exploitation and utilization of coal resources, mining activities have produced a large amount of mining solid waste, such as coal gangue, which has become the largest industrial solid waste in my country One, the current utilization ratio of coal gangue as a resource is less than 30%. A large amount of coal gangue is stored as a coal gangue hill, and the coal gangue hill is piled up in the natural environment. Under the effects of weathering and rainwater leaching, the coal gangue Trace heavy metal elements in the soil (including mercury, cadmium, lead, copper, cobalt, zinc, nickel, arsenic, selenium, tin, etc.) migrate int...

AI Technical Summary

Problems solved by technology

[0004] The invention provides a method for determining the migration trend of heavy metals in soil. By comprehensively considering the soil polluted by heavy metals and the plants distributed on it, scientifically setting sampling points and sampling depths, the concentration of heavy metals from the soil to the plants planted on it is obtained. It provides good reference data for determining the plant species suitable for remediation of heavy metal-contaminated soil and solving the problem that heavy metal-contaminated soil and remediation plant species cannot be well matched

Images