基于PMF模型的矿区土壤重金属来源解析

通过在某矿区采集农田土壤和菠菜样品，分析其中重金属含量，基于相关性分析和PMF模型对该矿区农田土壤重金属来源进行解析。结果表明，研究区土壤中Cd、As、Zn、Cr和Cu 元素明显富集，分别是当地土壤背景值的5.7倍、4.4倍、2.4倍、1.5倍和1.3倍；相关性分析结果显示，研究区内Cu、Zn、As、Cd元素存在一定的相关性，可能具有同一污染源；PMF模型结果说明，研究区土壤中重金属主要来源分别为工业污染源、自然母质源、交通污染源和农业污染源，其对当地土壤重金属污染贡献率分别为39.8%、22.8%、21.6%和15.8%。

Source Analysis of Heavy Metals in Mining Soil Based on PMF Model

In this study， the content of heavy metals in soil and spinach samples collected from farmland in a mining area was determined， and the sources of heavy metals were analyzed based on correlation analysis and PMF model. The results showed that the contents of Cd， As， Zn， Cr and Cu in the soil were significantly enriched， which were 5.7， 4.4， 2.4， 1.5 and 1.3 times of the local soil background value， respectively. The correlation analysis results showed that Cu， Zn， As and Cd in the study area were correlated to some extent， and might have the same pollution source. The results by PMF model showed that heavy metals in the soil of the study area mainly came from the source of industrial pollution， soil parent material， traffic pollution and agricultural pollution， the contribution rates of heavy metal pollution to local soil were 39.8%， 22.8%， 21.6% and 15.8%，respectively.