Citation: | XIN You-tao, LI Yun-feng, CHEN Zhuo, YU Jun-bo, LI Shao-wen. EVALUATION AND ANALYSIS OF SOIL HEAVY METAL POLLUTION BASED ON NEMEROW INDEX AND GEOACCUMULATION INDEX METHODS: A Case Study of Songling Area in Daxinganling Mountains[J]. Geology and Resources, 2024, 33(2): 196-201. doi: 10.13686/j.cnki.dzyzy.2024.02.008 |
According to the "Soil Environmental Quality Agricultural Land Soil Pollution Risk Control Standard (Trial)", 601 soil samples are collected in Songling area of Daxinganling Mountains to test the contents of 5 heavy metal elements of As, Cd, Cr, Hg and Pb in soil. The distribution and pollution degree of soil heavy metals in the area are studied based on Nemerow index and geoaccumulation index methods, assisted by Excel and ArcGIS software. The results show that the average contents of As, Cd, Cr, Hg and Pb are lower than the national standard risk screening values and pollution control values. In a few high value areas, the contents of Cd, Cr and Pb exceed the national standard risk screening values but not exceed the pollution control values, which has certain pollution risk, belonging to still clean level. As and Hg are at the pollution-free level.
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Distribution map of sampling sites
Evaluation results of pollution by Nemerow index
Evaluation results of pollution by geoaccumulation index