Abstract
Heavy metal pollution in soil is an unavoidable problem along with mining activities. This paper has reviewed the current research status of heavy metal pollution in mine soils in five aspects. They are evaluation methods of heavy metal pollution, migration activities of heavy metals in soil, migration mechanism, spatial distribution model and development trend of mine pollution research.
Highlights
The total amount method is the earliest adopted method
Recent studies have shown that the content of heavy metals is not the decisive factor to determine the degree of heavy metal pollution to the environment
Chemical speciation analysis has become the dominant method for heavy metal pollution assessment
Summary
In the evaluation of heavy metal pollution in mining areas, the commonly used evaluation methods includes total amount method, chemical speciation analysis method and biological indicator method. In the polluted soil adjacent to mining area, some plants are found as biological indicators to directly determine the degree of soil pollution according to the amount of heavy metals absorbed by them. This method is still in the process of developing with some problems remains to be solved, such as the selection of indicative plants, the scope of application and which part of the tissue roots, stems, leaves, fruits and which growing stage plants can be used as indicators
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