Risk Assessments of Plant Leaf and Soil Mercury Pollution in Different Functional Areas of Changchun City

Mercury is a global pollutant that has attracted widespread attention due to its persistence, concealment, and ease of migration. As the main setting for human production life, urban ecosystems play significant roles in mercury cycle. Urban vegetation also plays an important role regional cycles. In this study, several common tree species green Changchun were used as research objects examine pollution characteristics leaf litter surrounding soil. investigation, 100 sampling sites set up City collect topsoil. An RA-915+ Hg analyzer was determine total concentration levels. The results showed content levels plants ranged between 0.0133 0.1945 mg/kg, different displayed varying accumulation. For example, Pyrus ussuriensis Maxim. found be 0.0755 mg/kg higher than other examined subjects. It determined plant highest older industrial zones, while lowest new economic development zones. Furthermore, roadside areas vehicle discharge. Regarding surface-layer soil, soil old zones’ surface layers had tested sites. However, no notable connection observed those This study’s revealed not severe. zones graded moderate, regions low.