[Evaluation and Source Analysis of Soil Heavy Metal Pollution Around Typical Industrial Parks in Upper Reaches of Yellow River].

In order to explore the status and sources of soil heavy metal pollution around typical industrial parks in the upper reaches of the Yellow River， 377 surface soil samples were systematically collected from an important industrial park in Zhongwei area， Ningxia Hui Autonomous Region， and the content characteristics of the eight heavy metal elements As， Hg， Cr， Ni， Pb， Cd， Co， and Mn in the soil were analyzed. Single-factor pollution index， ground accumulation index， Nemerow index， pollution load index， and potential ecological risk index were used to comprehensively evaluate the soil heavy metal pollution level and potential ecological risk in the study area. Multivariate statistical analysis and the absolute principal component multiple linear regression （APCS-MLR） model were employed to quantitatively identify the sources of heavy metals in the soil.