Distribution Characteristics and Source Analysis of Soil Heavy Metals in the Liaoyang—Dandong Region

The Liaoyang—Dandong region is an important grain and cash crop production area in Liaoning Province. It is of great significance for monitoring the quality of black soil and studying the migration and transformation of heavy metals in soil to understand the distribution characteristics and sources of heavy metals in soil from 0 to 500cm. Soil samples were collected from different layers, and the contents of 8 heavy metal elements and Sc elements were determined. The average contents did not exceed the pollution risk screening value, Cd and Hg were obviously enriched in the surface soil, and Pb and Zn showed a certain enrichment trend. Cd, Hg, Pb and Zn in the surface soil were slightly polluted, the middle layer of soil was slightly polluted by Pb, and the deep layer of soil was not polluted. Pb, As, Co, Cu, Cr, Sc and Zn were affected mainly by natural background, Pb and Zn were affected slightly by local human factors, and Cd and Hg were affected significantly by human activities. In the future, it will be necessary to strengthen the monitoring of the enrichment trend of Hg, Cd, Pb and Zn elements in different plots. The BRIEF REPORT is available for this paper at http://www.ykcs.ac.cn/en/article/doi/10.15898/j.ykcs.202404070080.