Spatial variability characteristics and source analysis of heavy metals in soils of the Daxia River basin

Abstract

In order to understand the influence of heavy metals on the surrounding environment in the Daxia River basin and provide a scientific basis for environmental pollution prevention and control, 30 heavy metal samples were collected and the contents of five heavy metals, As, Cd, Cr, Cu and Pb, were detected. The contribution rates of As and Cr were 98.36% and 56.14%, respectively, which were mainly influenced by agricultural activities; the contribution rates of Cu and Pb were 42.28% and 89.80%, respectively, which were more influenced by traffic factors; and the contribution rate of Cd was 35.50%, which was influenced by industrial activities. industrial activities, the estimated probabilities indicate a risk of heavy metal pollution in the northeastern part of the study area in the Daxia River basin.