Research Progress on Remediation of Heavy Metal Contaminated Soil in Mines

Abstract

The environmental problems caused by heavy metal pollution in mines are becoming more and more serious, especially the large-scale heavy metal pollution will cause the waste of land resources. At present, there are many remediation methods for heavy metal contaminated soil in mines, and the results of research and practice are scattered, without big data analysis. This paper summarizes the current remediation methods of heavy metal contaminated soil in mines, and puts forward some suggestions for remediation of heavy metal contaminated soil in mines in the future. China is one of the countries rich in mineral resources. With the rapid growth of national economy, the development speed of mineral resources is accelerating, forming a large area of mined-out areas and abandoned land of metal mines, and the land area polluted by mineral resources development is expanding accordingly. The development of metal mines not only promotes the development of national economy, but also brings severe environmental problems. Chemical agents are usually used in the mining and dressing process of metal mines, and the harmful substances produced are fixed in the soil after circulation, which causes soil pollution and damages to the soil in different degrees. Soil pollution in metal mines is hidden, irreversible and lasting for a long time. Heavy metals are ingested by human body through food chain flow and atmospheric circulation, threatening human health and ecological security. During the "14th Five-Year Plan" period, the state attaches great importance to the construction of ecological civilization. Mine ecological restoration is one of the quantitative indicators assessed by local governments, and the restoration of heavy metal contaminated soil is an unavoidable problem. Therefore, it is necessary to conduct in-depth research and try to find the best solution.